Nikon 20-45x (Φ60) Zoom/25-56x (Φ78) Zoom MC Fieldscope Eyepiece

Nikon 20-45x (Φ60) Zoom/25-56x (Φ78) Zoom MC Fieldscope Eyepiece

The Nikon 20-45X (60) Zoom/25-56X (78) Zoom Eyepiece MC provides a clear and distinct image with 13-40x magnification when used with ED50, 20-60x magnification when used with III / EDIII, and 25-75x magnification when used with ED82.

All lenses are anti-reflective, which gives better light input and fewer reflections. The adjustable eyecup also makes it easy to get a comfortable viewing position.

Magnification

20-45x when attached to a Fieldscope III or EDIII; 25-56x when attached to a Fieldscope ED82; and 13-30x when attached to a Fieldscope ED50.

Angular field of view (Real/degree)

2 at 20x magnification when attached to a Fieldscope III or EDIII; and 1.6 at 25x magnification when attached to Fieldscope ED82; and 3 at 13x magnification when attached to Fieldscope ED50

Angular field of view (Apparent/degree)

38.5 for all models. At 20x magnification when attached to a Fieldscope III or EDIII; at 25x magnification when attached to a Fieldscope ED82; and at 13x magnification when attached to a Fieldscope ED50.

Field of view at 1,000m

Approximately 35 m when attached to a Fieldscope III or EDIII at 20x magnification; 28 m when attached to a Fieldscope ED82 at 25x magnification; and 52 m when attached to a Fieldscope ED50 at 13x magnification.

Exit pupil

3 mm at 20x magnification when attached to a Fieldscope III or EDIII; 3.3 mm at 25x magnification when attached to a Fieldscope ED82; and 3.8 mm at 13x magnification when attached to a Fieldscope ED50.

Relative brightness

9 at 20x magnification when attached to a Fieldscope III or EDIII; 10.9 at 25x magnification when attached to a Fieldscope ED82; and 14.4 at 13x magnification when attached to a Fieldscope ED50.

Eye relief

12.9 mm for all models at 20x magnification when attached to a Fieldscope III or EDIII; 25x magnification when attached to a Fieldscope ED82; and 13x magnification when attached to a Fieldscope ED50.