Came across this eyepiece on amazon:
I don't really trust the lanthanum glass description etc but never seen it mentioned before. Does anyone have experience using this before?
This isn't the short 62 degree aspheric, the 66 degree goldlines or the 68 degrees redlines. Seems that it comes in 9mm, 18mm and 34mm, with 2" eyepiece too.
Are these a clone of something?