What I've found out from this past weekend at the Adult Entertainment Expo is that the autofocusing accuracy is worse in certain lighting conditions if the assist light on the 550EX is on. I think the lighting in the exhibit hall is a factor. If it's bright, then the focusing is accurate. OTOH, backlighting or low light will cause it to backfocus. The screen installed in the 10D makes it difficult to manually focus in low light.
The only two venues to give me significant and repeatable focusing problems are the Sands Expo Center and the San Diego Convention Center. It must be the type of lighting installed there.
On Jan 10, 2004, at 6:49 AM, Jay D. Washington wrote:
The autofocus on my 10D is not so hot. It's always a little aft of where I
want it to be. The distance aft varies on the distance to the
subject--anywhere for a couple of cm to several feet. Because of this
tendency, I've developed a technique of:
1. Stopping down more than I'd like, often meaning I have to set the ISO
higher as well.
2. Waiting for focus lock then tweaking the focus ring clockwise a hair to
bring the focus more forward.
Due to the reduced size of the viewfinder image and the focus screen, it is
difficult for me to manually focus with great accuracy and speed.
I sent the camera in to Canon and they sent it back after 3 weeks stating
they set it to tolerances, but it's still the same. I've done multiple
tests on tripod with dice, film boxes, rulers, etc. with multiple lenses and
it's not my technique--it's the camera. Never had this problem with my Elan
II or my 1v, (or even my wife's G-1)
-- John Chennavasin | This article contains material which may inform and [EMAIL PROTECTED] | may be quoted, printed, forwarded, or redistributed www.fobpro.com | as long as the original attribution remains intact.
* **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
