I see what you mean now. Maybe it has something to do with giving the
sensor a moment to cool off? I ran my E-3 sensor so hot one time in
LV that the camera sent up a message on the LCD saying it couldn't
take it anymore and shut itself off.
While it is correct that the shutter could work independently of the
mirror, perhaps it was too expensive to build it so that the shutter
would open with mirror in one configuration for normal shooting and
another for LV, because it appears that the shutter never opens until
the mirror is in its "normal" place. You were thinking that shooting
in LV should be like MLU, no?
One thing that can be done is to use anti-shock (MLU) in LV if anyone
is worried about mirror slap.
Joel W.
On Thu, Jul 1, 2010 at 6:44 PM, Chuck Norcutt
<chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> Yes, the LCD runs directly off the sensor in live view. Whether the LCD
> can be run by the sensor during exposure is a technology implementation
> question but one which I think is immaterial to the discussion. As
> Moose pointed out yesterday it may well be necessary for the shutter to
> be closed and then reopened to effect the exposure. That's typically
> required on "full-frame" sensors (where the term full-frame here is a
> sensor design point and has nothing to do with sensor size).
>
> But even if the shutter needs to close momentarily (to dump the charge
> on the sensor's capacitors in preparation for the real exposure) that is
> no reason to lower and raise the mirror again (which causes vibration
> during what is probably a macro shot). The only reason to lower the
> mirror is to a) get to the phase detect autofocus sensors or b) the
> metering system's photocells because both the metering cells and phase
> detect sensors are in the pentaprism area. But with manual focus and
> manual exposure control... there's no reason to go there.
>
> Chuck Norcutt
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