EDG Eyepieces FEP Series

Key Features

Seven kinds of eyepieces for optimum optical performance
Bayonet mount with lock for easy attachment and release
Fully multilayer-coated
Waterproof up to 2m for 10 min., and fog-free — thanks to O-rings and nitrogen gas (body-and-eyepiece joint is water-resistant)
Turn-and-slide eyecup with three click stops: one for observing with the naked eye, one for observing with eyeglasses, and the other for digiscoping (except FEP-30W, FEP-25 LER and FEP-20-60)
FEP-30W offers a choice of eyecup: soft rubber eyecup for observation and digiscoping eyecup for connection with Digital Camera Bracket FSB series
FEP-25 LER has ultra-long 32.3mm eye relief
FEP-20-60 featuring long eye relief of 18.4-16.5mm employs an aspherical lens to minimise image distortion
Compact digital camera COOLPIX series can be attached to eyepiece of FEP series (except FEP-20-60) with Digital Camera Bracket FSB series

Swipe horizontally to view full table.

	FEP-20W	FEP-30W	FEP-38W	FEP-50W	FEP-75W	FEP-25 LER	FEP-20-60
Magnification (x)^*1	20 16	30 24	38 30	50 40	75 60	25 20	20-60 16-48
Real field of view^*1 (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
Apparent field of view^*2 (degree)	60	64.3	64.3	64.3	64.3	55.3	42-60
Field of view at 1,000m^*1 (m)	58 72	42 52	33 42	24 31	17 21	42 52	38-19 49-24
Exit pupil^*1 (mm)	4.3 4.1	2.8 2.7	2.2	1.7 1.6	1.1	3.4 3.3	4.3-1.4 4.1-1.4
Relative brightness^*1	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
Outer diameter x length (mm)	63x59	63x81^*3	63x74	63x71	63x71	63x77	63x99
Weight (g)	240	390^*3	230	230	230	320	330

*1Top row: When attached to EDG Fieldscope 85/85-A,
Bottom row: When attached to EDG Fieldscope 65/65-A
*2Nikon has adopted a calculation method based on ISO 14132-1:2002, and therefore, values for the apparent field of view have changed from those previously stated. For details, click here.
*3With detachable turn-and-slide eyecup.