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William Optics 9mm SWAN Ocular 1.25" Wide Angle Eyepiece with 72 Degree Field of View WE-SWAN-9mm on sale and available from our online store. OpticsPlanet, Inc is an Authorized US Distributor for William Optics Telescope Accessories.

Field of View: 72, Eye Relief: 12mm

Specifications of William Optics 9mm SWAN Ocular 1.25" Wide Angle Eyepiece with 72 Degree Field of View WE-SWAN-9mm:

Internally baffled, All lenses' edges and internal spacers blackened, Fully multicoated Model SWAN 9 Focal Length 9mm Lens Structure (#Elements/#Groups) 5/4 Field of View 72 Eye Relief 12mm Barrel 1.25" Coating FMC Parfocal Yes Weight 70g

· Inner Structure

Features of William Optics 9mm SWAN Ocular 1.25" Wide Angle Eyepiece with 72 Degree Field of View WE-SWAN-9mm:
SWAN: a premium eyepiece for your most demanding observations.
Unforgettable views of star clusters and the moon at 72 deg. F.O.V.
A premium eyepiece at a fraction of the cost it’s worth!

Super Wide FOV
• Outstanding super-wide field of view: 72 deg. F.O.V.
• Fully Multicoated lenses for excellent transmittance.
• Reduced chromatic aberration.
• Improved contrast compared to similar EPs.

Great Contrast
• Internally fully blackened (lens edges and internal spacers).
• No flaring or ghosting on high-contrast objects.
• Parfocal.

Light and Easy
• Soft 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.

Package Contents:

• 9mm SWAN Ocular 1.25" Wide Angle Eyepiece with 72 Degree Field of View

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William Optics 9mm SWAN Ocular 1.25" Wide Angle Eyepiece with 72 Degree Field of View WE-SWAN-9mm Rating & Reviews