Quote:
Originally Posted by Atmos
You're actually at 85.8mm I'm afraid.
A 3mm filter adds 1/3rd to the optical back focus (subtracts from the mechanical).
61.5+20+5.3-1=85.8mm
|
You sure? I was told you add the filter thickness into the total backfocus.
If that is true do you know where I can pickup 3 m68 or m69 1mm extenders. It would save the hassle importing them.