Pentax AF 280T camera flash User manual

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CONTENTS
FEATURES OF THE AF 280T .....we.coonerrererereco 1
PRECAUTIONS . .....oococcxoorreceroereorecrarmec 3
DESCRIPTION OF PARTS. ....ocomeoecroeeracrerer 4
FLASH PREPARATION ....ocecoccnmeoereccreceermecros 6
e inserting the Batteries .....roresreorcrererecrrr 6
e Test Flash . . ..oosrecsrroerreroacretcreco roce 6
eMounting ......ooecoereserererecrecrerrere т 7
e Indexing the ASA/ISO Film Speed. ......e.e.eeecrrvet> 7
THE MODE SÉLECTOR ....... 120004000050 00 4 8 500080 8
FLASH SYNCHRONIZATION/OPERATIONAL FEATURES...... 10
e Method of Synchronization . . . ...o.eoce.rrecsrerervre 19
e Synchronization/Operational Features Chart ....oÑoo.Xo remos 10
TWO-LEVEL AUTO FLASH OPERATION 2.242000 00050088 0 12
TTL AUTO FLASH OPERATION 000000000080 0A 16
M/S MANUAL (Manual Fiash with Auto Synch EEE о 20
MANUAL FLASH AT "MT. 220224000000 0450 000 8001880 22
ROTATING FLASH HEAD ...eoooesrererererrecereo 23
e Bounce Flash .....ooeorrrrserererrerrerceco ..24
eClose-up Flash .....eQeresreceo. aaa recrecroe. 24
BATTERY PRECAUTIONS ...e..-—eeorereerreverer 25
WIDE ANGLE/TELEPHOTO LENS ADAPTORS . .. cn vv vv ev os 26
SPECIFICATIONS . . . ..eoenverecrrarerecrererrr 28
AAC OCC ac a
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The Pentax AF 280T offers you two-level
automatic flash control through the built-in
sensor and two-level High/Low manual flash.
Additional standard features include
a convenient rotating flash head that permits
180° horizontal and 90° vertical bounce flash
operation. There's also a click-stop setting
at -15° for close-ups. And for difficult
bounce or other complex flash situations, the
auto check lamp confirms the lens aperture
setting by pressing the test button in Auto
modes.
Moreover, in addition to the above benefits,
the AF 280T also features the special
benefits of a “dedicated” and TTL flash
with many of the latest Pentax cameras.
How to use this manual
Regardless of the type of camera you own,
be sure to read the “Flash Preparation”
section of this manual beforehand, after
which, pause briefly at the “Flash Synchro-
nization/Operational Features” section
(pages 10-11) to examine the particular
features that the AF 280T has to offer when
used with your camera.
Cameras without “dedicated” /TTL
flash provision:
All sections of the manual, except TTL Auto
Flash Operation, contain information pertinent
to the operation of this flash unit with your
camera. Please read carefully.
Cameras with “dedicated” flash provision
When operated at the two-level auto mode
settings and also at the MS (manual w/auto
sync) settings, your camera will have the NOTE: For operation of the AF 280T with
added benefits of automatic flash synchro- late model Pentax cameras not specifically
nization and viewfinder flash data indication mentioned in this manual, refer to your
with the AF 280T. camera instruction booklet.
Cameras with TTL Auto Flash Provision:
Pentax cameras featuring a TTL flash
metering system were designed for TTL
Auto Flash operation with the AF 280T. With
such cameras, the “TTL Auto” is the main
operating mode, so after examining the chart
on pages 10-11, skip directly to the “TTL
ps Auto Flash Operation” section to gain
ВИТЯ an understanding of basic flash operation
with your camera. Then, go on to read the
other sections. In the “MS (Manual with
auto-sync) or “M” (Manual) modes, “Slow-
Speed sync” (Flash synchronization at a
slower shutter speed) is possible.
2
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Do not use the flash unit where it may
come in contact with rain or water because
the flash unit is not weather resistant.
Should the flash unit get dripping or
splashing water, wipe it off immediately
with a dry soft cloth.
* Do not expose the batteries to excessive
heat such as sunshine, fire or the like.
® Do not recharge the alkaline batteries.
* As flash unit contains high voltage cir-
cuitry, never disassemble. If repair is re-
quired, contact a Pentax service facility.
* Never touch internal parts of the flash if
they become exposed from dropping the
flash uint for some other reason, as there
is danger of an electric shock.
* Do not use the flash near anyone's eyes, as
it may hurt them. Be particularly careful
with the flash around infants.
¢ “RED EYE”
The RED EYE phenomenon occurs when the
flash illumination reflects off the retina because
the pupils open up in the dark. Although it is
impossible to prevent it entirely, it can be
minimized by lighting up the location up to
about EVS (ISO 100) level or shooting in a close
distance from the subject.
BENE
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O Flash head
O Slots for Wide-Angle/
Tele Adaptors
O Auto flash sensor
Battery compartment
lock lever
© Battery compartment
cover
© Flash head lock lever
© Flash head angle scale
© Hotshoe bracket
Auto exposure check
lamp
O Thumbscrew
® Test button
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Fh LM OFF UN
Flash Control Panel
O L Distance scale
(for MS “L” setting)
O Aperture scale
O ASA/ISO window
O ASA/ISO film speed index mark
© Viewfinder auto check
ON/OFF switch
GO Flash mode selector lever
Q Distance scale
© Wide-Angle/Tele Adaptor
aperture indices
© Two-level Auto aperture indices
@® ON/OFF Switch
@ Flash ready lamp
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Inserting the batteries
1. Press down on the arrowhead marking on the
battery compartment cover and slide the lever with
your thumb until the cover pops open.
2. Insert four AA size penlight batteries into the
battery compartment in accordance with the plus/
minus (+ -) markings and close the cover.
Test flash: Before mounting the flash unit on the
camera, it's a good idea to test it to see if the flash
is functioning properly. Slide the flash unit's ON/
OFF switch to the ON position.
In a few seconds, the flash ready lamp above the
power switch will light, indicating that the capacitor
has charged. After the lamp lights, press the test
button (TEST) to discharge the flash; then, slide
the power switch back to OFF.
NOTE: If the ready lamp fails to light within 30
seconds, batteries may be inserted improperly (if
new) or worn out (if old).
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Mounting the flash unit
1. Slide the flash unit's hotshoe bracket into the
camera hotshoe (this is easier if you grasp the flash
unit at the bottom near the bracket). Make sure the
bracket slides all the way into the hotshoe to ensure
proper contact.
2. Turn the thumbscrew in the direction of the
arrow (FIX) so that the unit is firmly fixed to
the camera.
To remove the flash unit: Loosen the thumbscrew
and slide the bracket out of the hotshoe.
® When the flash unit is attached to the 6711
camera, an optional Hotshoe Grip 67 I is
required.
Indexing the ASA/ISO film speed
Before operating the flash unit, index the ASA/1SO
film speed number of the film loaded in your camera
by sliding the ASA/ISO film speed lever of the flash
unit's control panel until the ASA/ISO film speed
number aligns with the white film speed index mark.
NOTE: If you neglect to index the film speed
properly, the indicated f-stops will not give the
proper exposure.
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Located at the base of the control panel on
the back of the flash unit, the mode selector
lever enables selection of any of the AF 280T's
six flash operating modes. To select the mode
of operation, slide the mode selector lever
until the white index mark on the back of the
selector corresponds with the index mark for
the desired operating mode.
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COMPATIBLE CAMERAS AND FLASH
MODES
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TTL AUTO This setting is used for the Through-
The-Lens flash contro! with Pentax cameras
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featuring TTL flash metering systems (see page 16).
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TWO-LEVEL AUTO These settings are used for
auto flash operation with all cameras; flash output
is controlled by the built-in auto flash sensor.
The GREEN setting is used for low flash output;
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the RED setting for high output flash (see page 12).
TTL AUTO — Aug AS
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MS (H, L) At these settings, manual flash with
automatic flash synchronization and viewfinder
flash ready indication is offered with recent
Pentax cameras. With other cameras, these settings
offer normal high/low manual flash {see page 19).
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TTL AUTO “AUTO MS
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M (Manual) This setting offers full output manual
operation. With Pentax cameras offering TTL/
dedicated flash mode, this setting enables you
to override the camera's TTL /dedicated flash
features (see page 21).
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The method of flash synchronization
and the operational features of the
AF 280T vary depending upon the
camera you are using. Two-level Auto,
MS (Manual with auto sync) and M
(standard Manual) flash operation are
featured with all cameras that offer
hotshoe synchronization, and TTL
Auto flash operation is available with
the Pentax cameras that have TTL
flash sensor built-in. With optional
accessories such as the Hotshoe Grip
and the Sync Cord 4P, you can use
the AF 280T as a grip type flash,
away from the camera. In addition,
with certain other Pentax cameras,
automatic flash synchronization and
viewfinder flash ready indication are
offered along with other dedicated
flash features (as indicated in the
chart). For further information about
features, be sure to refer to your
camera instruction manual.
10
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Flash TTL Auto, TTL Auto, #
Mode Two-level Auto, Two-level Auto, =
Two-levei MS, M Two-level MS, M Е.
Automatic With shutter dial With any of Auto exposure”
Sync-speed set at AUTO modes and Metered-Manua -.
setting еее mode 00 4a
Automatic No With the lens aperture E
Aperture ring set at the “A” =
setting Ë
Flash ready LED sign in viewfinder | 1) LED sign in viewfinder %
Indication 2) LCD sign on external E:
on camera 000 display 8
Auto Flash LED sign in viewfinder | LED sign in viewfinder £
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OTTL Auto O Auto modes © Ms
Two-level Auto,
Two-level MS, M
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TTL Auto, TTL Auto, Two-level Auto
Two-level Auto,
Two-level MS, M
Two-level MS, M
With any of Auto exposure
modes and Metered-Manual
mode 000
With any of Auto eXposure
modes and Metered-Manual
mode 000
With any of Auto exposure modes and
Metered-Manual mode
(Except A3/A3000) 00
With the lens aperture
ring set at the “A”
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With the lens aperture
ring set at the “A”
(Except 671) © ©
With the lens aperture ring set at the “A”
LED or LCD sign in
LCD sign in viewfinder
LED/LCD sign in viewfinder
viewfinder
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LED or LCD sign in No LED/LCD sign in viewfinder
viewfinder
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The AF 280T offers Two-Level {high/low} auto eWhen used with Pentax cameras having
flash operation via the flash unit's built-in sensor a programmed AE function with the aperture ring
with all cameras featuring hotshoe synchronization. of th lens set at A, ths aperture is automatically
set to the programmed f-stop on completion
1) Set the ASA/1SO film speed of the film in your of the charging.
camera in the ASA/1SO window of the flash unit
control panel (see page 7). -
2) Set the camera's shutter speed/contro! dial to
the proper synchronization mode (pages 10 - 11).
3) Set the mode selector lever on the flash control
panel to either the RED or GREEN Auto setting in
accordance with the adjacent chart. Either mode
may be used for the Tm — 3.5m operating range;
with subjects closer than 1m, however, the GREEN
setting must be used to obtain the proper exposure.
Conversely, for subjects beyond 3.5 meters
the high output RED mode must be used.
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GREEN or RED: 1m — 3.5m (3.2ft — 11.5ft)
It is simplest to use the RED mode for this
range and also saves batteries. The GREEN
setting may be used when a smaller lens
aperture is desired.
GREEN ONLY: 0.5—1m (1.6ft—3.2ft)
Overexposure resuits when the RED setting
is used for subjects closer than 1 meter; for
subjects closer than 0.5 meter, switch to
manual flash (see pages 19 - 21).
RED ONLY: 3.5—7m (11.5--24ft)
Underexposure will result if the GREEN set-
ting is used for subjects beyond 3.5 meters;
use manual flash for subjects further than
7 meters (see pages 19 - 21).
Setting the F-Stop
1} Pick out the f-stop on the aperture scale of the
flash control panel that is directly above the index
mark for the mode you have selected. if you are
using ASA/ISO 100 film, and the GREEN setting,
for example, you would use an aperture of 1/8;
with the RED setting, it would be f/4.
2) Set the aperture ring of the lens to the correct
f-stop.
NOTE: The RED and GREEN W and T markings
are provided for indexing the f-stop when using the
Wide-Angle and Telephoto Adaptors (see page 26).
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Shooting:
Slide the flash unit ON/OFF switch to the ON and
compose the picture. Shoot anytime after the flash
ready lamp lights.
Automatic Exposure Check:
Another advantage of the AF 280T is that you can
make sure your subject is within the flash unit's
automatic exposure control range by pressing the
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‘’Test’’ button before actually making the exposure.
If the subject is within the auto operating range
and proper exposure is possible, the auto check
lamp (A. CHECK) of the flash unit will light after
the exposure. If the lamp does not light, use
a more powerful flash setting or move closer to
the subject.
Viewfinder Flash Ready Indication:
Pentax cameras featuring dedicated flash provision
also offer the additional benefit of flash ready
indication inside the viewfinder. When the flash
unit reaches its charge, the LED or LCD flash ready
indicator inside the viewfinder will glow to
signal that the flash is ready. (The method of
indication varies from camera to camera; refer to
rating details.)
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Viewfinder Exposure Confirmation
In addition to the auto check lamp on the flash
unit, the LX, 645, and other ‘’programmed””
Pentax models (refer to pages 10 and 11} also
provide auto flash confirmation inside the
viewfinder, foilowing your flash exposures. If
the subject received sufficient light, the LED or
LCD flash ready indicator inside the viewfinder
will flicker.
FINDER ON
ACHECK OFF
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Flash Override
With the Pentax LX featuring IDM system, when
the flash is set in TTL Auto or Two-level Auto
flash mode, the camera's auto exposure system will
override the flash when the shutter speed exceeds
the required flash speed (see “TTL AUTO
OPERATION,’ page 16).
15
tE A TA
TNA ть
Using the AF 280T on the Pentax cameras
featuring TTL flash metering system enables you
to take flash photographs in the TTL Auto Flash
mode. The LX couples with the flash within the
camera's ASA/1SO range of 6 - 800, while other
models featuring TTL flash metering system, 25 -
800. In this mode, the flash is directly controlled
by the amount of light coming in through the lens
and reflected from the film plane. This automatic
flash mode permits you to use any lens aperture
~ within the flash unit’s operating range and
eliminates all the complicated calculations in using
filters and close-up accessories. Moreover, bounce
flash operation is made easier, while full
integration with the camera’s automatic exposure
system enables metering of both ambient and
electronic flash lighting during the exposure.
16
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Shooting
1) Set the ASA/ISO film speed in the ASA/1SO
window on the back of the flash unit (see page 7).
2) Set the flash mode selector to “TTL AUTO.”
3) Leave the camera's shutter dial set to
“Automatic,” and switch the flash unit “ON.” The
camera automatically synchronizes for flash at ‘X‘’
when the flash unit charges. In addition, both
the flash ready indicator in the finder and the
ready lamp on the back of the flash unit illuminate
as ready lights.
4) Select the desired f-stop, then after checking
that the subject is within the flash range offered
at your f-stop (see following paragraph or TTL
Auto Flash Range Chart), take the picture.
F-Stop Selection
The flash range varies of course depending upon
the f-stop in use. At small apertures, distance
is reduced considerably. It's a good idea to check
that the f-stop in use will offer adequate exposure,
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Checking the Exposure
Maximum distances: With distant subjects, merely
glance at the aperture scale on the back of the flash
unit. The figure on distance scale below the f-stop
you have selected is the maximum flash range for
that aperture. With ASA/ISO 100 film at f/8, for
example, the maximum range is 3.5m, at f/2, it is
14m.
Minimum distances: When shooting closer subjects
at wider apertures, it's a good idea to check the
flash range.
For details, refer to the TTL AUTO FLASH
Quick calculation of minimum distances: In
situations where it is inconvenient to carry the
chart or you shouid forget it, you can also easily
determine the ‘’safe’’ minimum distances by the
following simple calculation. With the AF 280T,
the minimum distance is approximately 1/5 of
the maximum distance at any given f-stop. When
using ASA/ISO 100 film at f/2, for example
14 (meters) + 5 = 2.8 (meters)
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Auto Flash Exposure Check
Pre-exposure checks for the auto
flash range cannot be made with
the flash mode selector set at
TTL Auto as the sensor is inside
the camera. However, if the aper-
ture you select is the same or
wider than the aperture indicated by the red or green
marks, you can make an approximate check by
moving the mode selector to either the red or green
Two-Level Auto flash setting {whichever js
appropriate) and pressing the test button. If the
subject is Properly expose , the A. CHECK lamp will
light. Turn the lever to the TTL Auto mode setting
before making the actual exposure.
e When the subject is closer than the auto operating
range or white or black even in the auto operating
range, the Auto Flash Exposure Check function
may not properly work, due to reflectance. In sych
a case, use the M or MS mode by referring to the
flash control panel,
18
A
Viewfinder Auto Exposure Confirmation
On TTL Auto, the AF-280T
signals confirmation inside
the viewfinder after the picture
is taken ensuring that your
subject received adequate flash
exposure. Immediately after
3 properly exposed photo on TTL Auto, the view-
finder flash ready indicator flickers. |f the
indicator does not light, additional distance
Or aperture adjustments are required.
The viewfinder signal can be turned off with
the FINDER A. CHECK switch on the back of
the flash.
® When this flash is used on Pentax cameras featuring
a TTL flash metering system (except the LX), with
its A-, F- or FA- lens sat at the “A* position, the pro-
grammed f-stop will be automatically set as soon as
the flash is fully charged.
TTL AUTO FLASH RANGE (ASA/ISO 100)
E 1 4
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e The chart is based on ASA
; 25, the distances halved.
* When used on the Pentax cameras featuring a TTL flash metering system (except the LX), with its A-, F- or
FA- lens set to “A” position, the programmed f-stop will be automatically set according to the ASA/ISO.
And the TTL Auto Flash range will be fixed distance of 1.3 - 7m (f/4 at ASA/1SO 100).
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/1SO 100. So, at ASA/ISO 400, the distances are doubled, while at ASA/ISO
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There are options of full output flash at the high
(H) setting, or a low-level flash output at the low
(L) setting— the latter is very convenient for ciose-
ups or work requiring a fast recycle time. In
addition, when Pentax cameras offering TTL/
dedicated flash functions are used at either of the
MS settings, the camera synchronizes automatically
for flash on charging. When used on a Pentax
cameras featuring a Programmed AE with
“Manual” exposure mode, “Siow-Speed Sync.”
synchronization at any shutter speed slower than
the sync speed. When the AF-280F is used at
the MS settings with cameras not having dedicated
flash provision, the standard two-level manual
flash operation is offered.
®When this flash unit is used on any “programmed”
Pentax camera in this flash mode, with its A-series,
F-series or FA-series lens set to “A” (Auto), the dedi-
cated flash provision does not function.
20
1) Set the ASA/ISO film speed of the film in your
camera on the back of the flash unit (see page 7).
2) Set the flash mode selector to the desired H or
L mode setting.
3) For automatic synchronization with cameras
offering TT L/dedicated flash provision, camera's
“Auto” or “Manual” mode may be used. For
cameras without TTL/dedicated provision, set
the shutter speed at *X” or slower.
NOTE: With the LX, the fail-safe feature
whereby the non-flash exposure overrides
flash at fast shutter speeds is still offered,
even when synchronized at ”X.” When
manual flash without the flash override
feature is desired, or when synchronization
is desired at speeds other than “X. switch
to the “M” manual flash mode (see page 21).
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Exposure Setting
1) First focus on the subject and look up the subject
distance with the distance scale on the back of the
flash unit. Then pick out the f-stop aligned with the
distance indicated. When using the high setting, use
the standard white distance scale below the aperture
scale; for the low setting, use the yellow L distance
scale above the aperture scale. -
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When you wish to use a specific lens aperture,
choose the lens aperture first, then adjust the subject
distance accordingly.
2) Set the selected f-stop considering flash range
and switch the flash unit on. When the flash ready
lamp lights either on the back of the flash or inside
the viewfinder (with cameras having dedicated/
TTL flash provision), press the shutter button all the
way to take the picture.
Be sure to turn the flash unit off immediately when
no longer needed.
Guide Numbers:
You can also calculate the correct aperture setting
for manual flash by dividing the guide number by
the flash-to-subject distance. With ASA/ISO 100
film at H and the subject at 7 meters, for example,
the correct f/stop would be GN28 + 7 = À or f/4
(to determine the aperture setting with guide
numbers that are in feet, divide the guide number
in feet by the distance in feet).
Guide Number Chart
CASA/ISO--. 50 100 200 400
m (G.No.) 20 28 40 55
ft. (G.No.) 65 92 130 180
m (G.No.) 5.7 8 11 15
ft. (G.No.) 18.7 26 36 49
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21
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When the flash mode lever of the AF 280T is set to
“M,” fui! output manual flash is obtained as with
the H setting of the MS mode. In this mode,
however, automatic synchronization at “X” and
viewfinder flash ready indication are not offered
with cameras having TTL /dedicated flash provision.
22
1) Set the ASA/ISO film speed on the film loaded
in the camera in the ASA/ISO window on the back
of the flash (see page 7).
2) Set the flash mode selector to 'M."’
3) Set the shurter dial to “X” (sync speed) or
below.
4) Caiculate the exposure as indicated in
“Exposure Setting” on page 21 using the standard
white distance scale below the aperture scale.
Then, switch the flash unit ON; take the picture
when the ready lamp on the back of the flash glows.
pais же нар Pn LE Ay E Paes E 44
The flash head of the AF 280T features full 105°
vertical and 180° horizontal rotation which is
highly convenient for bounce flash and other special
flash techniques.
Bouncing the light off of ceilings or walls is a very
effective way of avoiding the flat lighting or harsh
shadows which often accompany direct flash
lighting,
Bounce Flash on Auto: When bounce flash is
performed in either the TTL Auto or Two-Level
Auto flash modes, compensation isn’t required as
the automatic flash sensor automatically computes
the exposure. Moreover, to assure that the angle
you have chosen includes your subject, you can
perform a test flash by first pressing the “Test”
button at either two-level Auto modes; if your
subject is correctly exposed, the A. CHECK lamp
will light in green after YOu press the test button;
if it doesn't, exposure adjustments are required.
23
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Bounce Flash on Manual: When performing bounce
flash on manual, it is generally sufficient to exposure
one or two additional stops beyond the f-stop.
indicated by the guide number calculation,
However, because exposure is highly influenced by
the nature of the reflective surface and the color of
surrounding objects, formulas are quite varied. For
bounce flash, it's helpful to read a flash photo
guidebook beforehand.
Close-ups
For close-ups such as desk-top work at distances of
less than one meter, the flash head may be angled
to -15°. To lower the flash head, slide the flash head
lock lever toward the back of the flash unit, and
angle the head downward.
In addition to the TTL auto and the GREEN two-
level auto settings, the L setting of the MS mode
ts highly convenient for close-up work when using
small lens apertures.
24
Do not attempt to lower the head without first
releasing the lock or breakage could result.
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"BATTERY PRECAUTIONS:
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e Protect your flash from leakage by removing the
batteries whenever the flash unit will not be used
for long periods of time.
® When the ready lamp no longer lights within
30 seconds after a test flash, it's time to replace
batteries (replace earlier when faster recycling times
are desired.)
e Use batteries that are fairly new, as performance
tends to deteriorate with batteries that have
exceeded the expiration date marked on the battery
contacts. Performance also varies depending upon
brand and type. Best results are obtained with high-
performance alkaline batteires. Rechargeable Ni-Cad
batteries offer the advantage of shorter initial
recycling times but give less total flashes per charge.
e Batteries are also sensitive to cold and performance
trends to deteriorate at temperatures near freezing.
Performance is restored to normal as soon as
batteries are subjected to room temperatures. It's
a good idea to have a set of spares on hand that
have been kept warm when shooting in freezing
whether,
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e Replace all the batteries at the same time. Do not
mix battery brands and types, or old batteries with
new ones.
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The Pentax AFW 1 Wide-Angle Adaptor and the
AFT 1 Telephoto Adaptor offer greater flash beam
control when used in conjunction with the AF 280T
in both auto and manual flash modes. The Wide-
Angle Adaptor extends flash coverage for use with
35mm-format wide-angle lenses down to 24mm,
and improves results with 28mm and 30mm wide-
angle lens. The Telephoto Adaptor offers greater
Sel, concentration of the flash beam with 35mm-format
(AFW1) Nam telephoto lenses in the 85mm —200mm range.
How To Attach the Adaptors €
Fit either adaptor into the slots at the top and bottom
of the flash head, and slide it in all the way until it is
centered over the flash head,
Automatic Flash Exposure with the Adaptors
When either the Wide-Angle or Telephoto Adaptor are £
used when the flash unit is set for Two-Level Auto ;
Flash Operation, the W and T indices of the respective
GREEN and RED aperture indices on the back of
the flash unit are used as 3 guide for maximum
distance selection, Using the GREEN auto mode
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with ASA/1SO 100 film, for example, the flash range Manual Flash Exposure with the Adaptors
would be up to 8 feet with Wide-Angle Adaptor and To compensate for manual flash exposure with the
16 feet with the Telephoto Adaptor; in the RED adaptors, halve the ASA/ISO film speed setting in
mode it would be 16 feet with the Wide-Angle the ASA/ISO window on the back of the flash when
Adaptor and 32 feet with the Telephoto Adaptor. using the Wide-Angle Adaptor, and double the
Note that the flash range decreases when the Wide- setting with the Telephoto Adaptor. With ASA/1SO
Angle Adaptor is used and increases for the 100 film using the Wide-Angle Adaptor you would
Telephoto Adaptor as indicated by the respective set the dot representing ASA/ISO 50 in the
W and T index markings. ASA/1SO window, with the telephoto Adaptor
During TTL Auto operation, compensation for the align ASA/ISO 200 in the ASA/ISO window.
Adaptors is performed by the camera’s metering
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Type
Mounting
Guide Number
{at ASA/ISO 100)
Operating Modes
Auto Flash Ranges
Flash-Coverage
Angle
TTL Auto Range
Auto Sensor Angle
Apertures on Auto
Number of Flashes/
Recycling Times
28
Multi-mode, shoe-mount thyristor electronic flash unit.
Direct to camera hotshoe
28 in meters (90 in feet) at full output
8 in meters (26 in feet) at low output
TTL Auto: Measures light at film plane via camera's exposure sensor when used with cameras
offering TTL provision. Two-Level Auto: High/low auto flash via flash unit's built-in sensor with
choice of f-stops. MS: Two-Level high/low manual providing automatic sy nchronization/
viewfinder data readout coupling with cameras featuring TTL/dedicated flash; fast recycle at low
setting. “M’’: Manual flash permitting synchronization at "*X.*’
At red setting: 1—7 meters (3.5—24 ft.)
At green setting: 0.5—3.5 meters (1.6 ~ 11.5ft)
About 50° (vertical) and about 65% (horizontal); squivalent to the angle of view of
35mm-format at 28mm wide-angle lens and the angle of view of 645 format at 45mm
wide-angle and the angie of view of 67 format at 90mm lens
0.25—20 meters (0.8 - 65 ft.) at ASA/1SO 100 with an f/1.4 lens
20°
TTL Auto: All apertures at ranges specified on flash control panel. Two Level Auto: f/4 at ASA/
ISO 100, /8 at ASA/1SO 400 on RED; 1/8 at ASA/ISO 100, f/16 ASA/ISO 400 on GREEN.
GN 28 GN 8
Power Source: Alkaline Nicad Alkaline Nicad
Number of Flashes: 100 80 550 500
Recycling Times: sec. Gsec. 0.6sec. 0.5sec.
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Flash Control
Panel Data
Color Temperature
Synchronization/
Dedicated Flash
Bounce Flash
Power Sources
Size
Weight
Accessories
Optional Accessories
ASA/1SO film speed index, Distance scale {standard and low), Aperture scale, Two-Level auto aperture
indices {including W and T indices for Wide-Angle, Telephoto Adapters), six-way flash mode selector,
viewfinder auto check ON/OFF switch, flash ready lamp, flash ON/OFF switch, auto check lamp,
test button.
Balanced for daylight
Automatic synchronization with the shutter dial set to “Automatic” when used with Pentax cameras
having TTL/dedicated flash provision; synchronization for cameras without dedicated flash provision
as specified in camera’s instruction manual; automatic cameras with viewfinder shutter speed
Indication may use indicated auto speeds for flash.
Vertical and horizontal bounce flash capacity via rotating flash head; vertical angles from -15° —
90” with click- -stops settings at -15°, 0°, 45° ‚ 65° and 90° {lock release provided to lower flash
head below 0%); horizontal rotation "180° to the right (with click-stops at 45°, 90° and 180°);
rotates 90° to the left with click-stops at 45° and 90°).
Four AA size 1.5v alkaline or NiCad Battaries.
80mm x 68mm x 116mm (3.1 x 2.7” x 4.6”)
300g (10.602) without batteries.
Case
AFW-1 Wide Angle Adaptor, AFT-1 Telephoto Adaptor.
e Recycle times and number of flashes depand on power source used; condition of the batteries and distances between
flash and subject are given as approximations only.
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT ANY OBLIGATION
ON THE PART OF THE MANUFACTURER.
29
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№ | Asahi Optical Co, Ltd. 11-1, Nagata~cho 1-chome, Chiyoda-ku, Tokyo 100-0014, JAPAN (Internet: //Www.pentax.co.jp/)
3 Pentax Europe n.v. Weiveldlaan 3-5, 1930 Zaventem, BELGIUM (Internet: 7 www.pentaxeurope.com/)
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E,
Pentax GmbH. Julius-Vosseler Strasse, 104, D-22527 Hamburg, GERMANY (Internet: // www. pentax.de/)
Pentax U.K. Limited Pentax House, Heron Drive, Langley, Slough Berks SL3 8PN, U.K.
Pentax France S.A. 12/14, rue Jean Poulmarch, 95100 Argenteuil Cedex, FRANCE
Pentax Benelux B.V. (for Netherlands) Spinveld 25, 4815 HR Breda, NETHERLANDS
(for Belgium & Luxemburg) Weiveldlaan 3-5, 1930 Zaventem, BELGIUM
Pentax (Schweiz) AG Industriestrasse 2, 8305 Dietlikon, SWITZERLAND
Pentax Scandinavia AB P.O. Box 650, 75127 Uppsala, SWEDEN
Pentax Corporation 35 Invemess Drive East, Englewood, Colorado 80112, U.S.A. (Internet: // www.pentax.com/)
Pentax Canada Inc. 3131 Universal Drive, Mississauga, Ontario LAX 2E5, CANADA
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The CE marking assures that
this product complies with
the requirements of the EC
directive for safety,
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Copyright © Asahi Optical Co., Ltd. 1988
56783 ENG 03-9811 Printed in Japan
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