Pentax 2.5mm SMC-XO Series 1.25" Orthoscopic Eyepiece with 44 Degree Field of View.
High Refraction, Low dispersion Lanthanum Glass elements to provide high resolution images with minimal aberrations and distortions
Pentax Original SMC Full-Surface Multi-Layer lens coating to improve light transmission
Advanced computer simulation design technology was used to reduce internal reflections, producing brighter, clearer images
JIS Class 4 Weather Proof construction
Lens Structure: 6 elements, 3 groups
Apparent Field of View: 44°
Eye Relief: 3.9mm
Field Stop Diameter: 1.9mm
Dimensions: 2.2 x 1.9 in.
Weight: 4.9 oz.
For more information about, Pentax 2.5mm Eyepiece SMC-XO orthoscopic .