Ken,
If you're basing it on 35mm equivilents, wouldn't you still use 1/60 for an
80mm lens on 645, since the 80 on 645 is equivilent to a 50mm on 35mm
cameras?
--
Chris Crawford
Photography & Graphic Design
Fort Wayne, Indiana
http://www.chriscrawfordphoto.com My portfolio
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On 7/29/08 5:35 PM, "Ken Norton" <ken@xxxxxxxxxxx> wrote:
>
>> Concerning camera shake, now we're talking more complex math and I like
> the
>> "1/focal-length rule of thumb for 35mm format".
>
> Personally, I use that rule to apply to EQUIVELENT 35mm format. For
> example, if you can handhold a 50mm lens on a 35mm camera to 1/60th of a
> second, I extend that to mean that I need 1/90 to handhold an 80mm lens on a
> 645 camera. For my 4/3 camera, also work in the same equivelents: I get
> satisfactory performance handholding my 200/4 lens on the E-1 at 1/400 of a
> second.
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