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SWAN: a huge-lens rich-field eyepiece at a very reasonable price!

Fully multicoated advanced design for breathtaking and jaw-dropping 72 deg. F.O.V. views.
Try it out on the Milky Way!

A True Spacewalker!
• Marvelous 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 flaring or ghosting on high-contrast objects.
• Parfocal.

Ease of Use
• Soft rubber eyecup.
• Extremely long eye-relief: 28 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.


More Information
Internally baffled, All lenses' edges and internal spacers blackened, Fully multicoated
Model SWAN 40
Focal Length 40 mm
Lens Structure (#Elements/#Groups) 5/3
Field of View 72
Eye Relief 28 mm
Barrel 2"
Coating FMC
Parfocal Yes
Weight 570 g