Product Overview
Designed for use with Pentax spotting scopes and with astronomical telescopes with appropriate 31.7 mm focusers. It has weatherproof construction for greater durability. The smc Pentax 3.5 mm features high-grade Lanthanum glass with high refraction and low dispersion. In addition, original multi-coating and special coating on the laminated surfaces effectively reduce flare and ghosting, achieving extremely high lighttransmission performance.
Compatible with the Pentax PF-100ED, PF-80EDA, PF-80ED, PF-65EDAII and PF-65EDII spotting scopes.
Product specifications:
| Description | XW3.5 |
| Focal Length | 3.5mm |
| Lens construction [Elements/Groups] |
8/5 |
| Eye Relief Figures in parentheses are the distance from the viewing rubber |
20mm(15mm) |
| Apparent Angle of View | 70° |
| Coating* | Multi coating |
| Weatherproof | JIS class 4 equivalent (splash-proof) |
| Sleeve size | 31.7mm |
| Diameter & Length (minimum) | 137 x 61mm |
| Weight (+/- 5%) | 4055g |
| Accessories | Eyepiece lens cap, Objective lens cap |
