I've never had any focusing problems that I thought could be attributed
to the 5D but (and these may be a biggies) I only ever use center point
autofocus in single-shot mode, I have the autofocus button removed from
the shutter button and moved to the back of the camera and (perhaps the
real biggie) up until a couple of weeks ago I have only had f/2.8
constant aperture lenses. My latest acquisition, a Tamron 20-40/2.7-3.5
is obviously slower on the long end but I haven't used it enough to know
if it makes a difference to low light/low contrast focusing or not. So,
what's the speed of the lenses on your buddies 5D?
Yes, I have had a few focusing glitches but they're all quite
attributable to me forgetting to punch the AF button on the back of the
camera.
Chuck Norcutt
Garth Wood wrote:
> C.H.Ling wrote:
>> As your guys are talking about the Olympus 12-60's play, I have to express
>> my disappointment on the 4/3 system and the High Grade lenses. All come up
>> the the E-3 and the focus problem.
>
> I have to admit, this kinda fills me with sadness. I've just finished
> running some more tests, and I still cannot reproduce these focusing
> problems with my 12-60 or 50-200. Did I just luck out and get good
> copies? If so, what does that imply about Olympus' quality control?
> Are others not using their AF correctly, or expecting more out of the
> contrast-detection system than it's capable of delivering?
>
> I wish I had some hard answers to these questions, but I don't. I know
> my Canon-shooting buddy has had his share of losers when depending on
> the AF on his 5D, so I suspect that modern AF systems are starting to
> get twitchy and perhaps a tad unreliable as a result. If so, mebbe
> switching to MF in certain low-contrast situations is the only answer,
> regardless of camera system.
>
> That would be a bummer. My eyes aren't getting any younger!
>
>
> Garth
>
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