WLLIAM OPTICS SWAN 20 MM 1.25目鏡
WLLIAM OPTICS SWAN 20 MM 1.25目鏡
SWAN: the perfect compromise between quality, cost, eye-relief and edge
sharpness.
All with a SWA super-wide angle 72 deg. F.O.V. ! The ultimate 1.25 ” SWA
eyepiece.
Try and compare! Ideal with SCT and refractor telescopes.
Perfect match with William Optics telescopes
• Outstanding super-wide field of view: 72 deg. F.O.V.
• Fully Multicoated lenses for excellent transmittance.
• Outstanding chromatic aberration correction.
• Excellent contrast and light throughput for sharp viewing.
Great Contrast
• Internally fully blackened (lens edges and internal spacers).
• No internal reflections.
• No flaring or ghosting on high-contrast objects.
• Parfocal.
Light and Easy
• Soft rubber eyecup
• Long eye-relief: 17 mm
• No internal reflections, kidney bean effect
Terrific Fit and Finish
• High-resistance anodized black barrel.
• Smooth design for no hook up in your focuser.
• Threaded for 1.25” filters.
| Internally baffled, All lenses' edges and internal spacers blackened, Fully multicoated | |
| Model | SWAN 20 |
| Focal Length | 20mm |
| Lens Structure (#Elements/#Groups) | 5/4 |
| Field of View | 72 |
| Eye Relief | 17mm |
| Barrel | 1.25" |
| Coating | FMC |
| Parfocal | Yes |
| Weight | 100g |