That's true, it is more related to 5fps instead of the slowish 3fps. But the
lighter 40D is running at 6.5fps with larger mirror.
C.H.Ling
----- Original Message -----
From: "Ian Nichols"
>
> On 21/10/2007, khen lim <castanet.xiosnetworks@xxxxxxxxx> wrote:
>
>> Let's have a look at that mirror you referred to. The need to offer
>> 1/8000
>> sec max shutter speed forces the entire 'direct drive' assembly to be
>> re-evaluated and that includes not just the shutter mechanism but also
>> the
>> entire mirror box. If a small mirror was first designed to support 1/4000
>> sec, doesn't logic suggest that something needs to be done to beef up the
>> mirror, change the mirror, toughen the mirror etc etc to help it to cope
>> with a speed that is now twice as fast? I think so.
>
> Er, no, actually, logic doesn't suggest that at all. It's only the
> shutter that needs to be speeded up, the mirror will have stopped
> moving by the time the shutter starts opening.
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