ProStar 30mm 80 degree AFOV 2-inch (50.75mm) Super View Eyepiece for that out there experience
Outstanding performance for a special price that will give you a true sensation of being out there among the stars!
Our "Out-There" 30mm Ultra-Wide eyepiece has five elements of high-index, fully multi-coated glass boasting high light transmission allowing your telescope to be pushed to its magnitude limits. There is no kidney bean effect, ghosting and the eye relief is an amazing 22mm!
Focal length: 30 mm
Apparent Field of View: 80 degrees
Fully multi-coated - Elements: 5 elements in 3 groups
Eye relief: 22 mm and Field stop: 40.8 mm
Barrel: 2" / 50.75 mm
Rubber eyecup removable with M49 camera thread
Length: 114 mm (4.5")
Blackened lens edges
Threaded for 2" filters
Comes with End cap & sturdy bolt case
We've reviewed several wide-view 2-inch EP's over the years and especially for the price this one simply amazed us.
Field correction is good though edge performance does begin to soften very slightly with short focal ratio telescopes less than F/6. With our SkyWatcher ED100 the view and field correction was astounding as was the view in an 8-inch Schmidt-Cassegrain and our 7-inch MAK.
Even with a 10-inch f/5 Newtonian, stars appeared tack sharp far from the optical centre of axis - far better than many more expensive brands we've come across.
See extract from a published review below