DPChallenge: A Digital Photography Contest You are not logged in. (log in or register) 
 

DPChallenge Forums >> Hardware and Software >> Sigma 10-20+12mm extension tube: Possible?
Pages:  
Showing posts 1 - 3 of 3, (reverse)
AuthorThread
 09/15/2008 10:32:10 AM · #1
Hi all. I have seen a couple of sites talking about wide angle macro, and I'd like to try. I think the magnification factor is (extension/focal length), so about 1X. However, I'm worried that the focus point will be inside the lens. Can anyone enlighen me?

Thanks

Harry

Message edited by author 2008-09-15 10:32:24.
 09/15/2008 10:37:56 AM · #2
no idea but i'm intrigued to find out if anyone can come up with an answer to that question...
 09/15/2008 11:07:24 AM · #3
my guess is inside
tried extensions with a 20mm & the 10.5 fisheye & neither would focus
(24mm will but mm away from the front element )
Pages:  
Current Server Time: 04/19/2024 04:20:37 PM

Please log in or register to post to the forums.


Home - Challenges - Community - League - Photos - Cameras - Lenses - Learn - Prints! - Help - Terms of Use - Privacy - Top ^
DPChallenge, and website content and design, Copyright © 2001-2024 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 04/19/2024 04:20:37 PM EDT.