Archived posting to the Leica Users Group, 2010/03/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> 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). I first noticed it with my first medium format camera which was and is a twin lenes Rolleiflex with very smooth operation and Synchro Compur MXV shutter. A brick which takes pictures. I found shooting it with its classic 80mm Zeiss planar hand held to not follow the rule of thumb. An 80th of a second did not cut it sharpness wise I certainly felt much better at 125th of a second. A 60th was not sharp at all. This made stepping up to medium format much more difficult than I imagined. But I dealt with it. Later on the Hasselblad shooting with a 50 or 60 helped. And pre pop. [Rabs] Mark William Rabiner