Help Needed on 13mm Nagler

I am a newbie and need someone to explain how one can tell the difference between the 13mm Type 6 Nagler and previous versions of the 13mm eyepiece. Or is the Type 6 the only type that was ever made in 13mm? Your help is much appreciated! Thanks Mike in Terre Haute, IN

Hi Mike,
Look at Astromart ad number 140761. There's a picture of the previous 13mm Nagler. The new 13mm type 6 are smaller and it's 1-1/4". Go to Anacortes web site. They have a picture of the 13mm Nagler Type 6.

Nat Chotinun
Santa Fe, NM