The new Pentax XW 85 eyepieces, the XW23 and XW16, have been added to the PENTAX XW-series lineup featuring an extra -wide 70-degree apparent angle of view with 20mm eye relief to deliver an excellent wide-perspective image.
The Pentax XW 85 eyepieces offer seven elements in five groups that provide views that are sharp right to the edge of the field of view. The optical design includes lanthanum glass elements with high refractive power and low dispersion to deliver a balanced image with minimal aberrations. They are particularly designed to reduce the disturbing blackout effect by effectively compensating the spherical aberration of the pupil.
All air-to-glass surfaces are treated with Pentax SMC multi-coating and all surfaces feature a coating to achieve light transmission of more than 90 percent (96 percent at 550nm) across the visible light spectrum. The XW series features a light-shielding diaphragm at the most effective position to reduce internal reflections for a brighter, higher-contrast image.
The XW series features JIS Class 4 weatherproof construction, making it possible to use the eyepieces in drizzle or under night dew.
Specifications of the 2” Pentax XW 85 eyepieces include:
– Focal Length: XW23- 23mm; XW16.516.5mm
– Lens Construction (Elements/Groups): 7/5
– Apparent Angle of View: 85°
– Eye Relief: 20mm (12mm)
– Length & Diameter [mm]: XW23 – 125 x 76; XW16.5 – 142 x 76
– Weight: XW23 – 770g: XW16.5 – 745g
You can learn more about the Pentax XW 85 eyepieces here.
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