Pentax - XF-8.5 Eyepiece

The compact PENTAX XF series is ideal for planetary observations as well as general outdoor viewing. Each eyepiece provides a
60-degree field of view and also features smc full-surface multi-layer lens coating for improved light transmission and
high-refraction, low-dispersion glass elements for high-resolution images with minimal aberrations. These eyepieces may also be
used with PENTAX PF-65ED and 65ED-A spotting scopes.

With a focal length of 8.5mm, the high-performance PENTAX XF 8.5 eyepiece is ideal for outdoor viewing and bird watching. As a
standard unifocal eyepiece it offers a 60 degree apparent field of view, long eye relief, and bright, high-contrast images.

Lens Structure: 6 elements, 4 groups
Magnification: 46X
Real Field of View: 1.3 degrees
Apparent Field of View: 60 degrees
Field of View at 1000m: 22m
Field of View at 1000 Yards: 66 ft.
Angle of View: 1.3
Exit Pupil: 1.4mm
Eye Relief: 18mm
Field Stop Diameter: 8.8mm
Relative Brightness: 1.9
Height & Width: 3.3" x 1.7"
Weight: 5.3 oz. (150g)