They are perfectly parfocal, if I focus one and swap eyepieces, the other eyepiece is in sharp focus. I think it's reasonable to conclude that this 32 mm 70 degree SWA and the 34 mm 72 degree Svbony are the same eyepiece optically and mechanically. Jon That said, which focal length i...
Next up: the Svbony 34mm wide angle 2" eyepiece. As Jon Isaac has noted, this is actually a 32mm equivalent to the Orion 2" model. Even at f4.5, with a paracorr, the AFOV is reasonably well corrected and even better in a longer focal length instrument. Although I paid about $39.00 ...
Perhaps you had an introductory price. I got the Svbony 2" 34mm wide angle eyepiece the other year for 30 something bucks on Ebay and a few days later it went up to $79.00 and now I saw it listed for more than $140.00 shipped. So, it seems good deals can be had when the eyepiece...
So even though I think the performance is generally good, seeing the machine marks in the defocused star test was a kind of "fifth strike" for me for this eyepiece and I'm contemplating returning it since it's still within the return window. Here's my reasoning: 1. The distortion when ...