EDG Eyepieces FEP Series
| Model name |
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.
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- *3With detachable turn-and-slide eyecup.