[Leica] OT: Another maybe not so stupid GH1 question

[henningw at archiphoto.com (Henning Wulff)]

At 2:59 AM -0400 3/26/10, Mark Rabiner wrote:
>>  Vince,
>>
>>  The 45mm lens may require a faster shutter speed because, with the crop
>>  factor, most images will have to be enlarged more than they would if the
>>  lens were used with a larger sensor.  With more enlargement, camera shake
>>  becomes more evident.
>>
>>  Jim Nichols
>
>
>I wonder why it is than than medium format photography requires faster
>shutter speeds than 35mm?
>
>[Rabs]
>Mark William Rabiner


Because:

a) why shoot larger format if you're not going to get better quality? and

b) if you shoot MF SLR's, there's that very large, heavy flappy thing 
doing nasty things to the camera's stability. After all, if you have 
a mirror that's properly upsized for MF, it has a linear 
magnification of 2x (talking about 6x7 here), an aereal magnification 
of 4x and a mass magnification of 8x. That's a lot of mass to control.

If you're shooting a 6x7 rangefinder like the Mamiya 7 with between 
lens shutter, you don't have to increase shutter speed except 
possibly for reason a).


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    *            Henning J. Wulff
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