fact sheet black and white camera film with extended red sensitivity

April 2004
FACT SHEET
SFX
BLACK AND WHITE CAMERA FILM
WITH EXTENDED RED SENSITIVITY FOR CREATIVE PHOTOGRAPHY
SPECTRAL SENSITIVITY
Wedge spectrogram to tungsten light
(2850K)
Best results are often obtained in bright sunshine or
in the studio under tungsten lighting.
Wavelength (nm)
SFX 200 also has full panchromatic sensitivity to
ensure good pictorial contrast with or without the
use of a filter. It has a wide exposure latitude, is
compatible with all normal developers and has a
wide tonal range.
AVAILABILITY
SFX 200 is coated on 0.125mm/5-mil grey
acetate base which gives good halation
protection. SFX 200 35mm film is available in 36
exposure DX coded cassettes, suitable for all
35mm cameras. SFX 200 rollfilm is available in
120 lengths and is edge numbered 1 to 19.
EXPOSURE RATING
SFX 200 has a speed rating of ISO 200/24°
(200ASA, 24DIN, EI 200/24) to daylight. The ISO
speed rating was measured using ILFORD ID-11
developer at 20°C/68°F with intermittent agitation
in a spiral tank.
It should be noted that the exposure index (EI)
range recommended for SFX 200 is based on a
practical evaluation of film speed and is not based
on foot speed, as is the ISO standard.
Sensitivity
DESCRIPTION
ILFORD SFX 200 is a medium speed black and
white camera film for creative photography. It has
extended red sensitivity (up to 740nm) and is
especially suited for use with a filter to create
special effects. Using a very deep red filter, for
example the ILFORD SFX filter, skies can be
rendered almost black and most green vegetation
almost white. Its unusual tonal rendition ensures
interesting results for a range of subjects, including
portraits, landscapes, townscapes and architecture.
SFX 200 has a peak red sensitivity at 720nm and
extended red sensitivity up to 740nm.
USE OF FILTERS
Any yellow, orange or red filter may be used, but the
effect will depend on its transmission characteristics.
The redder the filter, the more dramatic the effect. The
ILFORD SFX very deep red filter is recommended.
Suggested filters include:
Filter factors
Filter
Filter
colour
Kodak Wratten
3
Very light yellow
8
Yellow
12
Deep yellow
15
Very deep yellow
21
Orange
23a
Reddish orange
25
Red
29
Deep red
89B
Very deep red
ILFORD
SFX 200
Very deep red
Filter Exposure
factor increase
(stops)
2
2
2.3
2.4
2.4
2.5
2.8
3
16
1
1
11/3
11/3
11/3
11/3
11/2
12/3
4
16
4
Very deep red
ILFORD SFX, B+W RG665, B+W 092, Heliopan
695 and 715, Hoya R72 and Kodak Wratten
89B. These filters give an even more dramatic
effect than deep red filters. However, exposure
times with these filters can be very long, so the use
of a tripod is recommended.
Deep red
B+W 091, Heliopan 29, Kodak Wratten 29 and
Rodenstock 29. These filters give a more dramatic
effect than red filters.
Page 1 of 6
SFX 200
Red
B+W 090, Cromatek HC4, Cokin 003, Hitech 25,
Hoya 25A, Jessop R2, Kodak Wratten 25, Lee 25
and Rodenstock 25. Under some conditions, the
effect with these filters can be quite subtle – similar
to a normal panchromatic film used with these
filters.
Several camera manufacturers also sell similar
filters, including Nikon, Canon and Leica.
Filters are available in different forms ranging from
gelatin, resin, plastic to glass. This table gives a
guide.
Filter
Type
B+W 090, 091,
Glass, screw-in or bayonet
RG665, 092
Cokin 003
Resin
Cromatek HC4
Resin
Heliopan 29, 695, 715 Glass, screw-in
Hitech 25
Resin
Hoya 25A, R72
Glass, screw-in or bayonet
ILFORD SFX
Gelatin with or without a
mount
Kodak Wratten 25, 29, Gelatin
89B
Lee 25
Polyester or resin
Rodenstock 25, 29
Glass, screw-in
Note Some of these filters may be available only
by special order.
ILFORD SFX FILTER
The ILFORD SFX deep red filter is recommended
for use with this film. It is supplied as 58x58mm
(2.3x2.3in) or 75x75mm (3x3in) gelatin sheets.
The larger size is also available in a Cokin mount.
LOADING THE CAMERA
SFX 200 must be loaded in subdued light. Unlike
true infra-red film, it is not necessary to load it in
total darkness.
FOCUSING
With some lenses, red light focuses at a slightly
different point to other visible light. With these
lenses there may be a focus shift when focusing in
white light compared with red light. However, it is
almost impossible to focus a camera with a deep
red filter in place.
With short to moderate focal length lenses, this
difference can easily be accommodated by
stopping down the lens to the smallest workable
aperture. Some lenses, particularly apochromatic
(APO) designs, may need no correction.
EXPOSURE
A certain amount of experimentation is needed
when first using this film. As a guide, bracket
exposures by ±2 stops from the TTL reading with
the filter in place or the meter reading with the filter
factor applied.
Note The TTL metering on some cameras can
under expose by up to 11/2-stops with deep red or
orange filters in place.
CHOOSING THE BEST ILFORD DEVELOPER FOR THE JOB
Manual processing (eg spiral tank, deep tank) and rotary processors
Liquid
Powder
Best overall image quality at meter setting
EI 200/24
ILFOTEC DD-X
ID-11 (stock)
EI 400/27
ILFOTEC DD-X
ID-11 (stock)
EI 800/30
ILFOTEC DD-X
ID-11 (stock)
Finest grain
ILFOTEC DD-X
PERCEPTOL
Maximum sharpness
ILFOSOL S
ID-11 (1+1)
Maximum film speed
ILFOTEC DD-X
MICROPHEN (stock)
One-shot convenience
ILFOSOL S
ID-11 (1+1)
ILFOTEC DD-X
MICROPHEN (1+1)
Economy
ILFOTEC LC29 (1+29)
ID-11 (1+1)
MICROPHEN (1+1)
Rapid processing
ILFOTEC HC (1+15)
–
Replenishable
ILFOTEC HC
ID-11
Machine processing
Dip and dunk
Short leader
ILFOTEC DD
ID-11
ILFOTEC HC
ILFOTEC RT RAPID
Roller transport
ILFOTEC HC
ILFOTEC RT RAPID
Page 2 of 6
Best overall image quality (liquid) and long tank life
Best overall image quality (powder) and long tank life
Flexible process time, range of dilutions and economy
Rapid processing, best overall image quality and
long tank life
Range of dilutions, flexibility and economy
Rapid processing
SFX 200
If you want to check the TTL metering system on
your camera before starting, set the metering
system of the camera to EI 200/24 and, with your
filter in place, make a series of exposures up to ±2
stops from the indicated exposure. After processing
decide which is the best negative and re-set the
camera if necessary. As an example, the correct
exposure in bright sunlight with the ILFORD SFX
filter is around 1/30 second at f5.6.
PROCESSING
SFX 200 can be processed in all types of
processing equipment including spiral tanks, rotary
processors, deep tanks and automatic processors.
Standard capacity figures and replenishment rates
can be maintained. SFX 200 is very robust in
processing and will tolerate less than ideal
processing conditions. Also, it will not contaminate
the processing chemicals.
Development times
The table gives development times for both manual
and machine processing. These times will produce
negatives of average contrast suitable for printing
in all enlargers. The development times are
intended as a guide and may be altered if a
different result is needed. For manual processing in
spiral tanks and deep tanks, the development times
are based on intermittent agitation. Where
continuous agitation is used for manual processing
(as with some types of processing tank), reduce
these times by up to 15%.
For use in rotary processors without a pre-rinse,
reduce the spiral tank development times by up to
15%. Generally, a pre-rinse is not recommended
as it can lead to uneven processing.
Note Development times may need adjusting to
suit individual exposing conditions, processing
systems and working practices. Adjust the
recommended development times until the desired
contrast level is obtained. Development times in
other manufacturers’ developers are included for
your convenience and are only a general guide.
Adjust these times, if necessary, to suit your
requirements. Other manufacturers can and do
change their products’ specifications from time to
time and the development times may change as a
result.
Page 3 of 6
SFX 200
Development times
35mm film and rollfilm
Meter setting
EI 200/24
EI 400/27
Spiral tank, deep tank, dip and dunk machines (min/20°C/68°F)
ILFORD developer
ILFOTEC DD-X
1+4
10
14
ILFOSOL S
1+9
91/2
111/2
1+14
13
19
ILFOTEC HC
1+15
5
7
1+31
9
13
ILFOTEC LC29
1+9
5
7
1+19
9
13
1+29
11
–
ID-11
stock
10
14
1+1
17
–
MICROPHEN
stock
81/2
101/2
1+1
151/2
19
1/
PERCEPTOL
stock
14 2
–
1+1
20
–
Non-ILFORD developer
Agfa Refinal
stock
8
111/2
Kodak D-76
stock
10
121/2
1/
1+1
14 2
–
Kodak T-Max
1+4
81/2
101/2
Kodak Xtol
stock
7
11
Kodak HC 110
A
5
7
B
9
13
Tetenal Ultrafin
1+10
10
13
Dilution
Dip and dunk machines (min/24°C/75°F)
ILFOTEC DD
1+4
Kodak T-Max RS
stock
Kodak Xtol
stock
81/2
6
7
111/2
7
9
EI 800/30
–
19
–
101/2
19
101/2
19
–
18
–
141/2
–
–
–
–
161/2
–
121/2
–
101/2
19
–
14
9
111/2
ILFOLAB FP40, roller transport and short leader machines (sec/26°C/78.8°F)
ILFOTEC RT RAPID
1+1+2
54
65
88
1+1+5
65
90
120
Kodak Duraflo RT
stock
100
135
200
Page 4 of 6
SFX 200
Processing at different temperatures
SFX 200 film can be processed over a range of
temperatures. Development times at temperatures
other than 20°C/68°F may be calculated from the
chart below.
Stop, fix, wash and rinse
For best results it is recommended that all process
solutions are kept at the same temperature or at
least within 5ºC (9ºF) of the developer
temperature.
For example, if 4 minutes at 20°C/68°F is
recommended, the time at 23°C/73°F will be 3
minutes and the time at 16°C/61°F will be 6
minutes.
Stop Bath
After development the film can be rinsed in water
but we recommend that an acid stop bath is used
such as ILFORD ILFOSTOP (with indicator dye) or
ILFOSTOP PRO (without indicator dye). ILFOSTOP
PRO is recommended for all machine processing
applications. When tanks or dishes (trays) of
process solutions are in use a stop bath
immediately stops development and reduces carry
over of excess developer into the fixer bath. This
helps to maintain the activity and prolong the life
of the fixer solution.
Temperature (°C)
ILFORD Stop
Bath
New development time (min)
Dilution
Temperature
range
Time (seconds)
at 20ºC (68ºF)
ILFOSTOP
ILFOSTOP PRO
1+19
1+19
18–24ºC
(64–75ºF)
18–24ºC
(64–75ºF)
10
10
Capacity
films/litre
15x(135–36)
(unreplenished)
22x(135–36)
The process time given is the minimum required, if
necessary a longer time may be used and should
not cause any process problems provided it is not
excessive.
Fix
The recommended fixers are ILFORD RAPID FIXER
and ILFORD HYPAM liquid fixers and ILFORD
ILFOFIX II powder fixer,all are non-hardening
fixers.
ILFORD Fixer
Dilution
New development time (min)
Agitation
Intermittent agitation is recommended for use in
spiral tanks and deep tanks. With spiral tanks,
invert the tank four times during the first 10
seconds, then invert the tank four times again
during the first 10 seconds of each further minute.
Otherwise, follow the recommendations given by
the processing equipment manufacturer.
Page 5 of 6
Temperature
range
Time (mins)
at 20ºC (68ºF)
Capacity
films/litre
(unreplenished)
ILFORD HYPAM &
ILFORD RAPID FIXER
1+4
ILFORD
ILFOFIX II
stock
18–24ºC
(64–75ºF)
18–24ºC
(64–75ºF)
2–5
4–8
24x(135–36)
24x(135–36)
SFX 200
WASH
When a non-hardening fixer has been used wash
the films in running water for 5–10 minutes at a
temperature within 5ºC (9ºF) of the process
temperature.
For spiral tank use, when a non-hardening fixer
has been used, the following method of washing is
recommended. This method of washing is faster,
uses less water yet still gives negatives suitable for
long term storage.
After fixing, fill the spiral tank with water at the
same temperature, +/– 5ºC (9ºF), as the
processing solutions and invert it five times. Drain
the water away and refill. Invert the tank ten times.
Once more drain the water away and refill.
Finally, invert the tank twenty times and drain the
water away.
Rinse
For a final rinse use ILFORD ILFOTOL wetting
agent added to water, it helps the film to dry
rapidly and evenly. Start by using 5ml per litre of
rinse water (1+200), however the amount of
ILFOTOL used may need some adjustment
depending on the local water quality and drying
method. Too little or too much wetting agent can
lead to uneven drying. Remove excess rinse
solution from the film before drying.
FIX HARDENER
ILFORD RAPID FIXER and ILFORD ILFOFIX II must
not be used with fix hardeners as they are not
compatible with them. If a fix hardener is required
then only ILFORD HYPAM fixer can be used. Add
ILFORD HYPAM HARDENER to turn HYPAM into a
hardening fixer.
Generally for most applications modern camera
films are sufficiently hardened at manufacture.
Additional hardening from a fixer hardener is not
usually needed or recommended for processing in
spiral tanks, dishes/trays, deep tanks, rotary
processors, dip and dunk (hanger) machines and
short leader card processors, unless the processing
temperature is above 30ºC (86ºF), or poor drying
performance is being experienced. To minimise the
risk of physical damage a fixer hardener may be
needed when using a roller transport film
processor.
Using a fix hardener will require the recommended
fix and wash times to be extended. Depending on
the film and processing conditions the hardened
fix time will be between 4 and 10 minutes and the
subsequent wash time 10–20 minutes in running
water.
The amount of HYPAM HARDENER that can be
added to the fixer is dependant on the film and
process conditions used. In some processors the
full amount of hardener cannot be used as the fix
and wash times cannot be extended adequately. In
these circumstances we recommend starting with
Page 6 of 6
the minimum amount of hardener to have some
effect. This is around 3–6 mls of hardener per litre
of working strength HYPAM used. This increases
the film hardness slightly but has a negligible effect
on the fix and wash efficiency. When fix and wash
times are restricted the maximum amount of
HYPAM HARDENER recommended is 10–20ml of
hardener per litre of working strength HYPAM
used. This higher amount gives a definite increase
to the hardness of the films processed and while
fixing and washing efficiency are reduced the films
will be adequately fixed and washed for most
purposes.
When fix and wash times can be extended the
maximum amount of HYPAM HARDENER needed
to achieve fully hardened films is 1 part to 40
parts working strength HYPAM i.e. 24 ml per litre.
Drying
To avoid drying marks, use a clean squeegee or
chamois cloth to wipe SFX 200 film before
hanging it to dry. Dry SFX 200 at 30–40°C/86104°F in a drying cabinet or at room temperature
in a clean dust-free area.
PRINTING
SFX 200 negatives can be printed in a similar way
to conventional panchromatic films. However,
because of the shift in relative tonal values a
degree of experimentation may be necessary to
get the desired result.
Experienced rollfilm users will notice that SFX 200
rollfilm negatives feel and look a little different to
other ILFORD rollfilms. This makes no difference to
the final prints.
The range of ILFORD MULTIGRADE variable
contrast papers is particularly recommended.
STORAGE
Store SFX 200 in a cool (10–20°C/50-68°F), dry
place in its original packaging.
Exposed film
Once exposed, process SFX 200 as soon as
practical. Images on exposed but unprocessed film
will not degrade for up to several months when
stored as recommended.
Negatives
Store processed negatives in a cool (10–20°C/5068°F), dry place, in the dark. Suitable storage
sleeves include those made of cellulose triacetate,
Mylar, paper (pH6.5–7.5) or inert polyester.
A wide range of fact sheets is available which describe and
give guidance on using ILFORD products. Some products in
this fact sheet might not be available in your country.
ILFORD Imaging UK Limited, Town Lane, Mobberley
Knutsford, Cheshire WA16 7JL, England
www.ilford.com
95084.GB.www
April 2004