Eyepieces; Eyepiece Specifications - Nikon EDG Série Manuel D'utilisation

Eyepieces

En
Es
Fr
De
It
Se
Nl
FEP-20W FEP-38W
Ru
Pt
TS ring DS ring
attachment attachment
Pl
Fi
No
Dk
Cz
Ro
Hu
FEP-30W
Screw either attachment into the eyepiece for use.
18
FEP-50W FEP-75W
FEP-25LER FEP-20-60

Eyepiece specifications

Models FEP-20W FEP-25LER FEP-30W
20 25
Magnification
(x)
16 20
3.3 2.4
Real field of
view (˚)
4.1 3.0
60 55.3
Apparent field
of view (˚)*
60 55.3
Field of view 58/173 42/126 42/126
at 1,000m/yds.
(m/ft.) 72/215 52/157 52/157
4.3 3.4
Exit pupil (mm)
4.1 3.3
18.5 11.6
Relative
brightness
16.8 10.9
20.1 32.3
Eye relief (mm)
20.1 32.3
81/3.2: turn-and-
Length
59/2.3 77/3.0
(mm/in.)
79/3.1: DS
Outer diameter
63/2.5 63/2.5 63/2.5
(mm/in.)
Weight (g/oz.) 240/8.47 320/11.29 390/13.76***
Waterproof (up to 2m for 10 min.) and fog free with nitrogen gas and
Structure
O-ring seals (body/eyepiece joint is water resistant)
Top row: When attached to EDG/EDG VR Fieldscope 85 series
* The number calculated by the formula [tan ω' = Γ x tan ω ]: Apparent field of view: 2ω', Magnification: Γ, Real field of view: 2ω
** At lowest and highest magnifications
*** With detachable turn-and-slide eyecup
FEP-38W FEP-50W FEP-75W
30 38 50 75
24 30 40 60
2.4 1.9 1.4 1.0
3.0 2.4 1.8 1.2
64.3 64.3 64.3 64.3
64.3 64.3 64.3 64.3
33/99 24/73 17/52
42/126 31/94 21/63
2.8 2.2 1.7 1.1
2.7 2.2 1.6 1.1
7.8 4.8 2.9 1.2
7.3 4.8 2.6 1.2
25.4 17.9 17.8 17.0
25.4 17.9 17.8 17.0
slide 74/2.9 71/2.8 71/2.8
63/2.5 63/2.5 63/2.5
230/8.11 230/8.11 230/8.11
Bottom row: When attached to EDG Fieldscope 65 series
FEP-20-60 En
20-60 Es
16-48
Fr
2.2-1.1**
De
2.8-1.4**
It
42-60**
Se
42-60**
Nl
38-19/115-58**
Ru
49-24/147-73**
Pt
4.3-1.4**
Pl
4.1-1.4**
Fi
18.5-2.0**
No
16.8-2.0**
Dk
18.4-16.5**
Cz
18.4-16.5**
Ro
99/3.9
Hu
63/2.5
330/11.64
19