[LRflex] Re: a 4/3 sensor to match the 36mm size?
- From: David Young <telyt@xxxxxxxxx>
- To: leicareflex@xxxxxxxxxxxxx
- Date: Mon, 03 Dec 2007 17:51:22 -0800
Dave Saalsaa wrote:
The only problem is the mirror size with a larger than full 24 x 36
mm format. Clearance with the rear element is an issue. Coverage
of the circle of confusion is not the issue here. The lenses will
cover anything up to 36 x 36 mm. But mirror clearance is the issue
as I see it and the larger the mirror the slower the max. shutter speeds.
Dave
Hi Dave!
Mirror clearance "may" be an issue, but I think there is enough room
to allow another 3 mm of mirror - if we accept some finder cut-off or
if we accept that one or two of the current optics which require the
extra clearance, may not be compatible. What I don't see, is how you
figure that max shutter speeds would be affected.
True, a vertical run shutter would have to traverse the additional
3mm, but that's just 12.5% further. Speeds of excess of 1/7000th
would still be possible, without any improvement in shutter
mechanisms. Given that shutters generally have a +/- 10% tolerance,
they could give us 1/7000th and tell us it was 1/8000th, and we'd
likely never know! More importantly, I suspect that such a small
increase in blade speed should be possible.
Just my 2 cents worth.
---
David Young,
Logan Lake, CANADA
Wildlife Photographs: http://www.telyt.com/
Personal Web-pages: http://www3.telus.net/~telyt
Stock Photography at: http://tinyurl.com/2amll4
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