For these low contrast problem images perhaps the camera is not actually
"locking on" and you are unaware of or unintentionally ignoring the
problem. On a Canyon 5D, if the camera is set in "one-shot" mode it
won't fire unless it believes the image is in focus. I don't know how
the E3 works or what sort of settings are available but perhaps it's set
to allow shooting whether or not focus is achieved and, with the low
contrast targets, it's not achieving it at all or perhaps not fast
enough before you fire the shutter.
Chuck Norcutt
C.H.Ling wrote:
> Thanks Moose, I also remember that thread but it could be related to
> focusing sensor size (may be not) due to the subject is 3D but my problem
> was with flat objects and very consistant.
>
> After further test with flash and tripod, it seem that the error is related
> to object contrast. For example, there are little different between AF and
> MF for the calender shots (cropped, actual pixel):
>
> http://www.accura.com.hk/P1150751.jpg (AF, 139KB)
>
> http://www.accura.com.hk/P1150752.jpg (AF, 140KB)
>
> For this one the different in sharpness is much bigger:
>
> http://www.accura.com.hk/P1150753.jpg (AF, 127KB)
>
> http://www.accura.com.hk/P1150754.jpg (MF, 158KB)
>
> C.H.Ling
>
> ----- Original Message -----
> From: "Moose" <olymoose@xxxxxxxxx>
> To: <olympus@xxxxxxxxxx>
> Sent: Tuesday, January 15, 2008 2:59 PM
> Subject: [OM] Re: E-3 focus problem
>
>> There was a thread about this issue starting on 12 Dec. I didn't follow
>> closely, for obvious reasons, and it inevitably branched out in other
>> directions, but I think there was some useful stuff.
>> http://www.fourthirdsphoto.com/vbb/showthread.php?t=20049
>>
>> There was also possibly useful conversation about the complexities of
>> the E-3 focus mode settings.
>>
>> Forum discussions apparently exist on the topic on dpreview.
>>
>> My sole contribution was to carp that I though the old 50-200 was poor
>> at focus on the E-1 when they came out. Maybe I played with a lemon -
>> but Oly did replace it.
>>
>> Moose
>
>
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