WLLIAM OPTICS SWAN 25mm 2目鏡
SWAN: with any focal length telescope, this great all-around eyepiece will
not let you down!
The incredibly wide 72 deg. F.O.V. makes it perfect for low-power rich-field
viewing.
A great optical achievement!
Spectacular Images!
• Outstanding super-wide field of view: 72 deg. F.O.V.
• Fully Multicoated lenses for excellent transmittance.
• Outstanding chromatic aberration correction.
• Sharp and well contrasted.
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
• Only 330g.
• Soft rubber eyecup.
• Extremely long eye-relief: 25 mm.
• No internal reflections
Terrific Fit and Finish
• High-resistance anodized black barrel.
• Smooth design for no hook up in your focuser.
• Threaded for 2” filters.
Internally baffled, All lenses' edges and internal spacers blackened, Fully multicoated | |
Model | SWAN 25 |
Focal Length | 25mm |
Lens Structure (#Elements/#Groups) | 5/3 |
Field of View | 72 |
Eye Relief | 21mm |
Barrel | 2" |
Coating | FMC |
Parfocal | Yes |
Weight | 330g |