Beautiful Ultra Wide Angle (UWA) Eyepiece, for beautiful observation sessions with your telescope. This 7-element UWAN eyepiece is ideal for rich-field observations at medium-high power.Extremely good price for its quality: look around and compare! Ideal for fast focal ratio telescopes (Dobsonian, etc.)
Super Wide FOV
Outstanding ultra-wide field of view: 82 deg. F.O.V.
Fully MultiCoated lenses for excellent light transmittance.
Reduced chromatic aberration.
Improved contrast compared to similar EPs.
Internally fully blackened (lenses edges and internal spacers)
No flaring or ghosting on high-contrast objects.
Light and Easy
Innovative twist-up 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.
Threaded for use with 1.25" filters.
Feb 8, 2014
A wild light showPros:
There are few 4mm, wide-field eyepieces, so I was looking forward to this 82 deg ocular for use in my 80mm f/7 Stellarvue ED refractor. In that scope it yields 141x, which I thought would make it my "workhorse" lens for that scope.
Unfortunately, attempting to use the lens on a bright object like Jupiter let to such bright and uncontrolled flaring/ reflections that it only lasted a few minutes in the scope.
I will try it again for some open-cluster use, but it has been a very disapointing purchase.
This review was provided courtesy of AgenaAstro.comSort by
Apparent Field of View 82° Barrel Size 1.25" (31.7mm) Bolt Case Included Yes - Free Agena Eyepiece Container Bolt Case Size Agena 52x80mm Coatings Fully Multi-Coated End Caps 2 Eye Relief by Design 12mm Field Stop Diameter 6mm Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6) Focal Length 4mm Lens Elements 7 Lens Groups 4 Parfocal Yes Rubber Eye Guard Yes (Twist-Up Eyecup) Blackened Lens Edges Yes Manufacturer William Optics Eyepiece Focal Length 5mm and Under Eyepiece Field of View Over 80 degrees Eyepiece Series William Optics UWAN Barrel Type Tapered barrel Eyepiece Weight 7.05oz (200g)