Thread: How to stop down a Canon EOS lens
View Single Post
  #9  
Old 08-07-2010, 06:57 PM
Octane's Avatar
Octane (Humayun)
IIS Member #671

Octane is offline 		 
Join Date: Dec 2005
Location: Canberra
Posts: 11,159
Troy and David,

Does this mean, if say, an objective lens (not the housing) was 100mm in diameter and was natively at f/2.8, then, to obtain f/4 you would cut out an aperture mask to allow 50mm diameter in the middle of the lens to receive light?

H
Reply With Quote