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