First I want to thank you all who have helped me erlier on this site.
Now I have questions about the Symmetrigons (the 4/4 designs actually, not the older 6/4).
This is an interesting design, not like the standard plasmat type. Do they really cover 72 degrees or ir that just the cut-off-limit?
Are all in #1-shutters? Filter sizes?
I know from before that some mentioned the cross-sections of them. Are there somelitterature that is available about them? I´d be very interested. Are they optimized for 1:5, 1:10 or 1:20? Are they APO-corrected?
This is a lot of questions, but thank you in advance.