SWAN: a huge-lens rich-field eyepiece at a very reasonable price! Fully multicoated advanced design for breathtaking 72 deg. F.O.V. jaw-dropping views. Try it out on the Milky Way!

Specifications:

• 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

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