Thread
:
APM 140mm APO doublet
View Single Post
#
30
07-07-2018, 09:14 AM
Atmos
(Colin)
Ultimate Noob
Join Date: Aug 2011
Location: Melbourne
Posts: 6,984
From what I’ve read FPL-53 has a higher abbe number (closer to fluorite) but FPL-55 is easier to figure and possibly has better mating glasses.
Atmos
View Public Profile
Find all posts by Atmos