I iaperturez New Member Mar 6, 2010 9 0 0 Jun 6, 2010 #1 I'm going to buy a brand new Sigma 50mm f1.4 lens. But heard a lot ppl say that the sigma lens got front & back focus problem. I have no idea how to test. Any experts here to share the methods of testing the lens in the shop when buying the lens.
I'm going to buy a brand new Sigma 50mm f1.4 lens. But heard a lot ppl say that the sigma lens got front & back focus problem. I have no idea how to test. Any experts here to share the methods of testing the lens in the shop when buying the lens.
Octarine Moderator Staff member Jan 3, 2008 12,991 119 63 Pasir Ris Jun 6, 2010 #2 Please do yourself a favour and use the Search function, upper right hand. Topic has been discussed in detail multiple times, just recently here: http://www.clubsnap.com/forums/showthread.php?t=707094
Please do yourself a favour and use the Search function, upper right hand. Topic has been discussed in detail multiple times, just recently here: http://www.clubsnap.com/forums/showthread.php?t=707094
P pokiemon Senior Member Mar 5, 2005 2,035 0 0 Jun 6, 2010 #3 yep. read the link octarine has sent to you. if you still dont understand how it works, post your questions here!
yep. read the link octarine has sent to you. if you still dont understand how it works, post your questions here!