Thread: Barlows
View Single Post
  #2  
Old 20-05-2017, 12:26 PM
Merlin66's Avatar
Merlin66 (Ken)
Registered User

Merlin66 is offline 		 
Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
I say yes to all three......
You're changing the effective focal length and focal ratio...
Reply With Quote