ed lens (1 Viewer)

AM a bit confused about optics quality in eyepieces.

WIth a scope body you know that an ED scope is superior to a non ed scope.

HOwever some renowned lens arent called ED. ie baader

I guess a lens with lanthanum glass is effectively an ed lens?

lens that are 70-80degree fov have more elements in than 55-60 degree lens.

will this affect optical quality?

ideally am after a lens with 60+ fov eyerelief of 15mm+ and as good an image quality as possible, if it weighs in at 50-90 quid then so much the better.....any suggestions?

(have a pentax 65ed on order)

http://handsonoptics.com/index.php?main_page=product_info&cPath=1_7_40&products_id=564

very curious to know what this would be like in the 65....anyone tried something similar?

Try searching the bin forum ... there are a couple of threads discussing what ED actually means over there (Abbe number would be a good search term).

ED glass is basically no use in an EP though other exotic (but not ED) glasses are like LaK (lanthanum crown)

so you reckon an ed lens doesnt affect colour abberation?