Exposure, shutter speed and apperture, depends on light and film emulsion, not film format
Finally, is there a way to view the image the right way round???
Hi all, I am tempted by the gorgeous resolution of LF.
My main concern is the slower shutter speeds required. As I mainly shoot people, often indoors using natural daylight, I wonder whether this type of shooting will work against me and I will have lots of blurred shots.?? Also I read that the Dof can be really unforgiving also, increasing the need for the subject to be still (and/or shoot faster)
I currently shoot Mamiya RZ67 on a tripod and Pentax 67 handheld
Finally, is there a way to view the image the right way round???
Thanks
Paul
Use a prism instead of a waist level finder.
There is always the old style subject head clamps used way back when.
Thanks for the responses guys. I would prefer to view the ground glass. I shoot this shot indoor with window light with Iso 400 film at 1/60 with a 110mm lens at f2.8
What would be the equivalent dof, lens and shutter speed to make this shot with a LF camera?
Just approximately?
Thanks for all the comments
You can figure this out from the ratio of the film sizes, which is easy in this case because 6x7 (55x69mm) is basically the same aspect ratio as 4x5 film (95x115mm), and the ratio of the two sizes is about 115/69=1.66. If you're familiar with 6x7 and want to think about 4x5 options, keep that 1.66 number in mind for all your conversions.
To get the same field of view, you need 110*1.66 = 180mm lens. And for the same DOF, f/(2.8*1.66) = f/4.5. And because of the smaller relative aperture, you need 1.66^2 = 2.8x (about 1.5 stops) more illumination, exposure time or sensitivity.
f/4.5 lenses are not real common on 4x5 but they do exist, e.g. Xenars. Most people just cheap out and buy modern f/5.6 lenses and ignore that last half-stop - you won't be able to shoot in as low light as you can with the RZ; you will need 2 stops more light (f/5.6 vs f/2.8) than the RZ does. That's the tradeoff with bigger film.
If you go to 8x10 that's a doubling, so it's 2 more stops of light required over what 4x5 needs.
just to show a simple portrait made with window light - 18x24cm paper neg (iso about 6) old Petzval lens - "top hat shutter" about one sec...
Dogs and fidgety kids can always be stuffed in a freezer half an hour in advance of the shoot, just like butterflies. Besides, reflections of ice are always nice in black and white prints.
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