Re: Can someone actually has used micro adjustment share their REAL experience?
Rocky said:
In this tread, a lot of people like to have micro adjustment in 60D. Some people says they don't need it. Some people actually says the micro adjustment will even mess up even more on the focusing issue. Can someone share their real life experience on using micro adjustment??? Thanks
First off, read Roger's (lensrentals.com)
article on the issue. I haven't heard of AF microadjustment messing up autofocus - I suppose that if it's not done properly, it could.
Personally, I use AF microadjustment, and that feature was one of the reasons I upgraded from a T1i to a 7D (my then-new 100mm f/2.8L Macro IS was backfocusing). As I stated above, most consumer zoom lenses have narrow apertures and thus such a deep depth of field that you'd never notice the problem (unless the lens has a close MFD and you shoot at the close distance).
I have many lenses with wider apertures, meaning shallow DoF wide open, and in unadjusted lenses, I do notice a difference. Even on some lenses with variable/slow apertures, such as the 70-300mm f/4.5-5.6 DO, there are issues solved by adjustment - my copy of that lens was noticeably backfocusing (i.e. I'd focus on the eye of a frog in a pond, and the area of critical focus would be somewhere along his back, with his eye a little soft). With lenses like the 85mm f/1.2L II, DoF is so shallow that you immediately notice an AF problem.
I've calibrated 12 lenses on my 7D, and 11 of them have had some amount of adjustment applied. Obviously, the amount of AF microadjustment needed will be different for each unique camera and lens combo, so these numbers are useless to anyone else, but to give you an idea here they are:
–5 EF-S 10-22mm f/3.5-4.5 USM
+1 EF-S 17-55mm f/2.8 IS USM
+2 EF 24-105mm f/4L IS USM
+2 EF 70-200mm f/2.8L IS II USM
+6 EF 70-200mm f/2.8L IS II USM + 1.4x
–7 EF 70-300mm f/4.5-5.6 DO IS USM
–3 EF 85mm f/1.2L II USM
–1 EF 100-400mm f/4.5-5.6L IS USM
–1 EF 100mm f/2.8L Macro IS USM
±0 EF 85mm f/1.8 USM
–2 EF 200mm f/2.8L II USM
+2 EF 300mm f/4L IS USM
I use the
LensAlign Pro to do my AF microadjustment calibrations. DataColor is
coming out with something similar. Going back to the statement above, about AF microadjustment messing up AF, I suspect if you were 'just eyeballing it' when doing the adjustment, it might not be very effective.