EDG Fieldscope
EDG Fieldscope Main Body
Specifications
EDG Fieldscope 85
EDG Fieldscope 85-A
EDG Fieldscope 65
EDG Fieldscope 65-A
85
85
65
65
Objective diameter (mm)
Close focusing distance (m)
5.0
5.0
3.3
3.3
Length (mm)*
379
398
313
332
127×102
131×102
120×88
131×88
2,030
2,030
1,560
1,620
Height × width (mm)*
Weight (g)*
* Body only
EDG Eyepiece
Specifications
FEP-20W
EDG Fieldscope diameter
85
FEP-30W
65
85
65
FEP-38W
85
65
FEP-50W
85
65
FEP-75W
85
65
FEP-25 LER
FEP-20-60
85
85
65
65
Magnification (×)
20
16
30
24
38
30
50
40
75
60
25
20
20-60
16-48
Real field of view (degree)
3.3
4.1
2.4
3.0
1.9
2.4
1.4
1.8
1.0
1.2
2.4
3.0
2.2-1.1
2.8-1.4
72
42
52
33
42
24
31
17
21
42
52
38-19
49-24
4.3-1.4
4.1-1.4
Apparent field of view (degree)* 1
Field of view at 1,000m (m)
60
58
64.3
64.3
64.3
64.3
55.3
42-60
Exit pupil (mm)
4.3
4.1
2.8
2.7
2.2
1.7
1.6
1.1
3.4
3.3
Relative brightness
18.5
16.8
7.8
7.3
4.8
2.9
2.6
1.2
11.6
10.9
18.5-2.0 16.8-2.0
Eye relief (mm)
20.1
25.4
17.9
17.8
17
32.3
18.4-16.5
Length (mm)* 2
59
81*3
74
71
71
77
99
Outer diameter (mm)*
2
Weight (g)* 2
63
63
63
63
63
63
63
240
390*3
230
230
230
320
330
The Cuttin g E D G e in S po r t Opti cs
*1) Calculated based on ISO 14132-1:2002 *2) Without caps *3) With detachable turn-and-slide eyecup
Optional accessories
Stay-on-cases*
FS Eyepiece Mount Adapter
EMA-1
SOC-8
SOC-7
(for EDG Fieldscope 85/85-A)
(for EDG Fieldscope 65/65-A)
Enables mounting of conventional
screw-in type MC/DS eyepieces
or FSA-L1 to EDG Fieldscope.
*Depending on your area, these accessories may be included or sold separately.
Please contact your local dealer or Nikon office in your region for further information.
Specifications and equipment are subject to change without any notice or
obligation on the part of the manufacturer.
August 2009
©2009 NIKON VISION CO., LTD.
Nikon Futaba Bldg., 3-25, Futaba 1-chome, Shinagawa-ku,
Tokyo 142-0043, Japan
Tel: +81-3-3788-7697 Fax: +81-3-3788-7698
En
www.nikon.com/sportoptics
Printed in Japan
Code No. 3CE-BPNH-1 (0908-10) K
A More Brilliant, Vibrant World
Nature. Raw, untamed, in all its glory.
It’s a vision you can see… a vision you can feel.
A vision that brings all of your senses to life.
The time you spend cherishing the wonders of our
planet, and beyond, is truly precious, time you can’t
afford to waste. So naturally, in your quest for
perfection, you seek the very best.
And in the vast world of extraordinary Nikon sport
optics, nothing reveals that more clearly than
Nikon EDG.
Nikon’s superior chromatic-aberration
compensation system: “Advanced apochromat”
with ED glass elements
Advanced multilayer coating delivers
clearer views
Sophisticated roof (Dach) prism technology
combines outstanding optical performance
with an unparallelled slim design
A store of valuable cutting-edge optical
technologies ensures a higher light transmission
rate with exceptional characteristics
EDG Fieldscopes bring together Nikon’s most sophisticated
lens technologies with a precision optical design that gives you
a sharper, more brilliant field of view.
Our apochromat optical system, which uses ED (Extra-low
Dispersion) glass, corrects violet chromatic aberration in
addition to the conventional chromatic aberrations of red, blue
and green.
Because chromatic aberrations are corrected to the furthest
limits of the visible light range, and colour fringing is effectively
compensated, whites are clearer and sharper.
The sophisticated coating
Nikon applies to EDG
Fieldscopes goes far beyond
conventional methods.
Multilayer coatings, which
provide an even, high light
transmittance across the
entire visible light spectrum,
are applied to all of the lens
and prism surfaces that
transmit light. This minimises
the loss of light due to
reflection, thereby ensuring a more natural, clearer view.
EDG Fieldscopes use a roof
(Dach) prism, enabling an
exterior design of unparallelled
beauty.
Angled models achieve clearer
images thanks to an optical
system that employs a prism
featuring total reflection on the
internal surfaces. In the
straight models, a dielectric
high-reflective multilayer
prism coating is applied to a
surface that does not offer total reflection in order to realise a
brighter viewfield. Both straight and angled models boast an
advanced level of exterior design and internal optical
performance.
A wealth of advanced technologies are integrated into each
and every optical part of an EDG Fieldscope. This cutting-edge
technology results in a higher light transmission rate and
flatter characteristics across the entire visible light range.
This means you’ ll experience a crystal-clear field of view and
more natural colour reproduction.
Incident light
Advanced apochromat
Reflected light
Incident light
Reflected light
100
EDG Fieldscope 85-A + FEP-20-60
Transmittance (%)
2
Nikon’s superior condensed
optical technologies deliver
crystal-clear viewing
Nikon conventional Fieldscope + Zoom eyepiece
50
• Phase-correction coating applied to the roof surface of
a roof (Dach) prism to deliver high-contrast images
Conventional apochromat
Residual chromatic aberration comparison
0
420
Nikon conventional Fieldscope
550
Conventional multilayer coating
600
650
700
(For reference example only)
• Thanks to EDG Fieldscopes’ high optical performance,
they are also practical for recreational astronomical
observations.
EDG Fieldscope 85
500
500
Wavelength (nm)
EDG’s multilayer coating
450
450
550
600
650 (nm)
3
EDG Technology
High-performance EDG eyepieces
reveal a spectacular field of view
Eyepiece
The seven new eyepieces demonstrate extraordinary EDG quality, too. Designed
and developed with an advanced level of innovation, all feature a bayonetwith-lock design. Five are wide-angle models ranging from 20x to 75x*, one offers
ultra-long eye relief, and the other is a 20-60x zoom*. To create these eyepieces,
Nikon developed solutions for difficult optical design issues, merging a wide field
of view with long eye relief. Also, a field flattener lens system has been adopted for
these eyepieces to correct overall aberration and achieve a sharp image even to
the edge of the field of view. The result is beautifully clear viewing.
An exquisite body design, attained through
a sophisticated simulation process
Tough, well-balanced structure, achieved through CAE design
Smooth, comfortable focusing with “Optimised Focusing
System”
Ergonomically designed, the large
focusing ring fits comfortably in your
hands and allows you to operate at
optimised speeds — fine action for
focusing on distant subjects, and
coarser action for nearby subjects.
This results in smoother focusing,
allowing you to capture your targets
faster, and with much less stress.
Wind vibration analytical simulation example
Pressure
75°
Wind: 5m/s
Three tripod mount screw holes
provide flexible mounting for
optimal balance in observation
and digiscoping
Near zone
(Fast movement)
Middle zone
(Medium movement)
Outstanding wide field of view
and brightness
[Wide eyepiece (FEP-20W)]
Ultra-long eye relief of 32.3 mm
[Long eye relief (FEP-25LER)]
When mounted on EDG Fieldscope
85/85-A, the real field of view is 3.3˚
and the exit pupil is 4.3 mm. This
wide eyepiece that delivers bright
and high-resolution images is
effective for use in low-light conditions such as dusk and dawn.
Wide field of view, high-eyepoint, high-resolution even
at the periphery [Wide eyepiece (FEP-30W)]
The FEP-30W features a long eye relief of 25.4 mm and a wide field of
view. It gives you a high-resolution, uniformly bright image throughout
the viewfield, with superior quality even at the periphery.
Distant zone
(Slow movement)
Focusing ring rotation degree
This eyepiece, with a long eye relief of over 30 mm, allows eyeglass
wearers to use a Fieldscope without removing their glasses.
Recommended for the judging of sports such as shooting or archery.
Employs high-refractive-index
aspherical glass lens
[Zoom eyepiece (FEP-20-60)]
Zoom-type eyepiece with magnification of
20x to 60x*. The optical system features a
high-refractive-index aspherical glass
lens. Corrects image distortions and
provides a flat image even at the periphery
at both low- and high-magnification
settings.
High-refractive-index aspherical glass lens
* When attached to EDG Fieldscope 85/85-A.
Distant side
New design concept to ensure superior operation
Operability in both observation and digiscoping was given the utmost
consideration from the earliest stages of
planning and development. Examples of
this include a bayonet mount for easy and
secure connection of EDG eyepieces or
Digital SLR Camera Attachment FSA-L2,
and smooth focusing operation with a
focusing ring even when a digital SLR
camera is mounted — factors which set
the standard for a whole new generation
of Fieldscopes.
Objective lens side
Tripod mount screw holes A, B or C can
be used depending on the application,
such as observation or digiscoping.
A
Anticlockwise:
Near side
Nonlinear movements of focusing
Near side
* Wind pressure distribution used for dynamic response analysis.
Clockwise:
Distant side
Distant side
Movement distance of
focusing lens
4
Nikon employed CAE (Computer Aided Engineering) in pursuit of the ideal
body construction. We maintained a strict continuity from design,
through simulation, to problem solving and re-design, in order to achieve
shock-resistance, the optimum weight and aerodynamic balance. To
realise stability for both observation and digiscoping, the stiffness and
integrity of the mount and tripod were analysed utilising the finite
element method, and the equipment movements caused by regular
operation and wind, as well as camera vibrations in digiscoping, were
precisely simulated.
* When attached to EDG Fieldscope 85/85-A.
B
FEP-20W
20x/16x wide
FEP-30W
30x/24x wide
FEP-38W
38x/30x wide
FEP-50W
50x/40x wide
C
• The body and EDG eyepieces have been fully waterproofed
using O-ring seals and nitrogen gas, the body/eyepiece joint is
water resistant
• Buit-in sliding hood protects the objective lens
FEP-75W
75x/60x wide
FEP-25 LER
25x/20x
FEP-20-60
20-60x/16-48x
Left magnification value: With EDG Fieldscope 85/85-A. Right magnification value: With EDG Fieldscope 65/65-A.
* Photos are simulated images when eyepieces are mounted on EDG Fieldscopes. Image size varies according to subject distance, and brightness varies depending on magnification.
5
Digiscoping System
A new realm of digiscoping beauty
Besides observation, EDG Fieldscopes are designed for digiscoping,
allowing smooth connections to a digital camera for spectacular
telephoto pictures. The advanced optical system, well-balanced
body and smooth focusing — all these and more will let you capture
beautiful moments of high precision and image quality.
Uniquely Nikon, uniquely EDG.
Fieldscope Digital SLR Camera Attachment FSA-L2
World first 3.5x zoom*1 for super telephoto shooting with a focal
length of up to 1,750mm* 2
6
7
Quickly and easily attaches directly to the F-mount of a Nikon digital SLR
camera, for easy connection with your EDG Fieldscope.
Multilayer coating is applied to all lens elements for brighter optics. The
zoom function features an internal vari-magnification system, with
magnification of 3.5x. When attached to EDG Fieldscope 85/85-A, the
focal length ranges from 500mm to 1,750mm. As for the camera’s
exposure mode, in addition to Metered Manual, Aperture-Priority Auto
Mode is available.
Provides a natural synchronisation in exterior design when attached to a
digital SLR camera and EDG Fieldscope.
*1 Among Fieldscope digital SLR camera attachments. (as of July, 2009)
*2 When attached to EDG Fieldscope 85/85-A.
At low magnification
FSA-L2 Specifications
Magnification
Nikon Digiscoping System Chart for EDG Fieldscopes
3.5x zoom
Mount
Bayonet mount
Exposure mode (camera setting)
A (Aperture-Priority Auto) / M (Metered Manual)
Exposure metering (camera setting)
Centre-weighted metering
Length × diameter
150mm × 62mm
Weight
435g
With EDG Fieldscope 85/85-A
At high magnification
Focal length
Aperture (focal length)
EDG Fieldscope
Digital SLR Camera Attachment
FSA-L2
Nikon Digital SLR
Cameras
D3 series/D2 series/
D700/D300 series/D200/
D100/D90/D80/
D70 series/
D5000/D60/D50/
D3000/D40 series
With EDG Fieldscope 65/65-A
500 - 1,750mm
400 - 1,400mm
(DX format: 750 - 2,625mm)
(DX format: 600 - 2,100mm)
EDG Fieldscope
f/5.9 - 21 (500mm - 1,750mm)
f/6.2 - 22 (400mm - 1,400mm)
85/85-A/65/65-A
*Camera’s autofocusing mode cannot be used. Perform focusing using the EDG Fieldscope focusing ring.
*When used with a Nikon DX-format digital SLR camera, the picture angle is equivalent to approx. 1.5x focal length of 35mm
format.
*The actual f-number and the focal length vary depending on the actual zoom setting, while the camera display and image
data show the constant f-number (13) and focal length (800mm).
*When used with a Nikon FX-format camera, vignetting occurs at focal lengths between 500mm and 750mm with EDG
Fieldscope 85/85-A and between 400mm and 600mm with EDG Fieldscope 65/65-A.
*Because the optical system characteristics differ from those of ordinary interchangeable lenses, the exposure level may
vary depending on the camera model; use exposure compensation if necessary. Exposure compensation may be required
when zoom is set at a wider position.
EDG Fieldscope Eyepiece
FEP series
(except FEP-20-60)
Digital Camera Bracket
FSB series*
Nikon Digital Camera
COOLPIX series
(some models are not compatible)
• The above chart is as of August 2009, updated information will be available at: www.nikon.com/sportoptics/
* Digital Camera Bracket FSB series
The FSB series bracket is an adapter that allows
you to connect a wide selection of Nikon
COOLPIX series compact digital cameras to EDG
Fieldscopes, enabling you to enjoy digiscoping.
EDG Fieldscope
EDG Fieldscope Main Body
Specifications
EDG Fieldscope 85
EDG Fieldscope 85-A
EDG Fieldscope 65
EDG Fieldscope 65-A
85
85
65
65
Objective diameter (mm)
Close focusing distance (m)
5.0
5.0
3.3
3.3
Length (mm)*
379
398
313
332
127×102
131×102
120×88
131×88
2,030
2,030
1,560
1,620
Height × width (mm)*
Weight (g)*
* Body only
EDG Eyepiece
Specifications
FEP-20W
EDG Fieldscope diameter
85
FEP-30W
65
85
65
FEP-38W
85
65
FEP-50W
85
65
FEP-75W
85
65
FEP-25 LER
FEP-20-60
85
85
65
65
Magnification (×)
20
16
30
24
38
30
50
40
75
60
25
20
20-60
16-48
Real field of view (degree)
3.3
4.1
2.4
3.0
1.9
2.4
1.4
1.8
1.0
1.2
2.4
3.0
2.2-1.1
2.8-1.4
72
42
52
33
42
24
31
17
21
42
52
38-19
49-24
4.3-1.4
4.1-1.4
Apparent field of view (degree)* 1
Field of view at 1,000m (m)
60
58
64.3
64.3
64.3
64.3
55.3
42-60
Exit pupil (mm)
4.3
4.1
2.8
2.7
2.2
1.7
1.6
1.1
3.4
3.3
Relative brightness
18.5
16.8
7.8
7.3
4.8
2.9
2.6
1.2
11.6
10.9
18.5-2.0 16.8-2.0
Eye relief (mm)
20.1
25.4
17.9
17.8
17
32.3
18.4-16.5
Length (mm)* 2
59
81*3
74
71
71
77
99
Outer diameter (mm)*
2
Weight (g)* 2
63
63
63
63
63
63
63
240
390*3
230
230
230
320
330
The Cuttin g E D G e in S po r t Opti cs
*1) Calculated based on ISO 14132-1:2002 *2) Without caps *3) With detachable turn-and-slide eyecup
Optional accessories
Stay-on-cases*
FS Eyepiece Mount Adapter
EMA-1
SOC-8
SOC-7
(for EDG Fieldscope 85/85-A)
(for EDG Fieldscope 65/65-A)
Enables mounting of conventional
screw-in type MC/DS eyepieces
or FSA-L1 to EDG Fieldscope.
*Depending on your area, these accessories may be included or sold separately.
Please contact your local dealer or Nikon office in your region for further information.
Specifications and equipment are subject to change without any notice or
obligation on the part of the manufacturer.
August 2009
©2009 NIKON VISION CO., LTD.
Nikon Futaba Bldg., 3-25, Futaba 1-chome, Shinagawa-ku,
Tokyo 142-0043, Japan
Tel: +81-3-3788-7697 Fax: +81-3-3788-7698
En
www.nikon.com/sportoptics
Printed in Japan
Code No. 3CE-BPNH-1 (0908-10) K
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