Mostly mirror lock-up -- I suppose some folks pre-set the camera, then
lock the mirror up to avoid vibration(?), or to avoid risking their
eyes. I suppose it could also damage the screen if the mirror was
down....
The worst case I've seen was when (it appears) someone left the camera,
lens attached, mirror locked up, on the seat of their car. As the sun
traversed the sky, it's image was focused onto the curtains. At the end
of the day, there was a neat arc of burnt spots across the curtain.
Walt Wayman wrote:
> >In a message dated 6/4/2002 12:05:23 PM Central Standard Time,
> >clintonr@xxxxxxxxxxxxxxxx writes:
> >
> >>Oh, great -- we'll be seeing a bunch of cameras with holes
> >>burned into the curtains again....
> >>
>
> >How would that happen? People frequently have the sun in a
> >picture they have taken and it does not burn a hole in the
> >shutter curtain.
> >I have heard of it happening with rangefinders which do not have
> >a mirror when they are left lying face up for a while in the sun
> >without a lens cap.
> >--
> >Winsor Crosby
> >Long Beach, California
>
> I wondered myself. When the shutter curtains are closed, the
> mirror is down. When the mirror is up, the curtains are either
> moving or open. How could this happen? I pondered. (I try to
> ponder a couple of times a day.)
>
> Then a feeble spark ignited, producing this notion: using the self
> timer could do it. The mirror is up and the curtains are closed.
> It's only a few seconds, but if you've focused on the sun, it
> could happen. Or not. I really don't know. I'll yield to Clint
> on how it happens.
>
> Walt
>
>
>
>
>
>
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