Thanks. But I'm still a bit confused. Although the E-420, E-30 and
E-620 all share the contrast detect (on the Imagaer) AF capability the
video shows that only the E-620 did not appear to drop its mirror when
the exposure was taken. But then I'm further confused by the fact that
the A-620 is clearly in aperture preferred autoexposure mode. Since the
meter sensors are in the pentaprism area and the mirror wasn't dropped
when was the exposure determination made?
Chuck Norcutt
Moose wrote:
> On 6/30/2010 12:26 PM, Chuck Norcutt wrote:
>> No metering involved if the camera is set to manual exposure control. And
>> autofocus can be performed with the mirror up buy using contrast detect
>> autofocus on the E-420, E-520, E-620 and E-30. But again, manual focus can
>> be performed on any of them with live view. My question specifically
>> requested detail of operation in manual focus and manual exposure control ...
>
> You are looking in the wrong place. Apparently Oly doesn't care to
> explain how the more advanced parts of their cameras work. (I'm relying
> on your perusal of the "manuals".) As AG has said, Oly seems to have
> identified their target buyers, and it ain't us. Or maybe ... it is some
> of us, as none of the E-thingie users here seemed to know the answers? ;-)
>
> DPReview, however, continues on its mission to be highly informative:
>
> "The E-620 allows you to choose which method it uses to autofocus when
> in live view. 'AF Sensor' mode uses the camera's phase-detection AF
> sensor, just as it does when you're not using live view. This limits you
> to the 7 conventional AF points and means that your live view preview
> won't be in focus (until you press the AEL/AFL button to flip the mirror
> down and focus the camera).
>
> Alternatively you can select 'Imager AF,' which uses the imaging sensor
> to perform contrast-detection AF, which is a little slower to achieve a
> lock but means that you can grab the shot as soon as it's focused
> (rather than having to wait for the mirror to drop, AF be achieved and
> the mirror rise again, as is the case in AF Sensor mode). There's also a
> hybrid mode that attempts to make the best of both systems. Even so,
> whichever mode you use will introduce the kinds of delays that you
> simply won't be used to encountering either on compact cameras or when
> using a DSLR through the viewfinder.
>
> Ultimately, these drawbacks (and there are drawbacks to all DSLR live
> view systems) restrict the usefulness of live view. There are some
> specific applications in which it can be useful (such as tripod work and
> Macro shooting), but if you want seamless compact-camera-style live
> view, you need a compact camera or a mirrorless interchangeable lens
> camera, such as the Panasonic G1 or Olympus E-P1, which have been
> designed specifically to use live view as their primary interface."
>
> They don't directly address MF, but it seems clear that if the mirror
> doesn't come down in Imager AF mode, it won't other in in MF, either.
>
> They have even gone so far as to post videos of the various modes in
> action, so you can see how long the functions take and what the screen does.
>
> E-420 <http://www.dpreview.com/reviews/olympuse420/page7.asp>
>
> The E-30 review Live View page section about LV modes is the same as the
> E-420 and the E-520 looks identical to me.
>
> E-620 <http://www.dpreview.com/reviews/olympuse620/page8.asp>
>
> Moose
>
>
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