WLLIAM OPTICS SWAN 4mm 1.25目鏡
WLLIAM OPTICS SWAN 4mm 1.25目鏡
"
The ultimate high power eyepiece for ultra wide field views!
UWAN 4mm will yield truly amazing views of our starry sky at a truly amazing price. Finished are the times when a quality eyepiece had to cost the earth! Now you have a choice: take it or regret it!
Super Wide FOV
• Outstanding ultra-wide field of view: 82 deg. F.O.V.
• Fully MultiCoated (FMC) glass for excellent light transmittance.
• Reduced chromatic aberration, but still bright.
• Improved contrast compared to similar EPs.
Great Contrast
• Internally fully blackened (lenses’ edges and internal spacers).
• No flaring or ghosting on high-contrast objects.
• Parfocal.
Light and Easy
• Innovative twist-up rubber eyecup.
• Long eye-relief: 12mm.
• No internal reflections, kidney beaning or other distracting distortions.
Terrific Fit and Finish
• High-resistance anodized black barrel.
• Smooth design for no hook up in your focuser.
• Threaded for filters’ usage.
| Internally baffled, All lenses' edges and internal spacers blackened, Fully multicoated | |
| Model | UWAN 4 |
| Focal Length | 4 mm |
| Field Stop Diameter | 6 mm |
| Lens Structure (#Elements/#Groups) | 7/4 |
| Field of View | 82 |
| Eye Relief | 12mm |
| Barrel | 1.25" |
| Coating | FMC |
| Parfocal | Yes |
| Weight | 200g |