Archived posting to the Leica Users Group, 2009/03/05
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I just browsed the Fred Miranda reviews on this lens and did find a few comments about back focus. George's test is a good one. Try the test wide open and at several wider f stops to see if the focus point moves at all. Good Luck, Elizabeth. Len On Mar 5, 2009, at 12:25 PM, Chris Williams wrote: > What George said, but also I see plenty of posts on wedding forums > where the 24-70 seems to back focus on 30D and 40D's. They end up > sending in both lens and both to calibrate both, which if under > warranty Canon should do for free. > > Chris > NOLA > > ----- Original Message ----- From: "George Lottermoser" Subject: > Re: [Leica] potential focus issues > > > Ruff test: > Lock it down on a tripod. > Pick the center focus spot. > Focus on 18" on a yard stick at 45? > This should indicate whether the lens is back focusing, front > focusing or dead on. > > Once you know that - more discussion can follow. > > Regards, > George Lottermoser > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information