bshaffer
15-Jun-2006, 16:47
I have 2 ...14 inch RD artars -both in barrel and a copal 3 ready to use .
one is aluminum housing #831952 and the other brass # 776762 . obviously the brass is about twice as heavy ( 470 vs 225 gms + or - )the aluminum one looks like a process mount -with no threads for a filter either front or aft . the brass lens has threads on front and aft .any advantage to either other than the weight and filter capability . which should I send to get mounted ? glass on both ok... a few more wisps on the brass front element .
am I missing something that I should be thing about -prior to mounting in shutter .
thanks for any insight
barry
one is aluminum housing #831952 and the other brass # 776762 . obviously the brass is about twice as heavy ( 470 vs 225 gms + or - )the aluminum one looks like a process mount -with no threads for a filter either front or aft . the brass lens has threads on front and aft .any advantage to either other than the weight and filter capability . which should I send to get mounted ? glass on both ok... a few more wisps on the brass front element .
am I missing something that I should be thing about -prior to mounting in shutter .
thanks for any insight
barry