Paul since you have shot 35mm in the conditions that you favor (especially the dark ones) and should know approximately what F stops and shutter speeds you'll be shooting at, look at the link below and plug in your values selecting 4x5 under film format in the top line. Next plug in 135 under focal length (a normal lens for a Graphic) and F8 for a reasonably shallow depth of field for a decent hand holdable shutter speed depending on conditions, maybe not yours. Then put in whatever distance you want and hit compute. In the table below you'll see your dof at apertures. You can change the distances in the left hand column of the results table below. This table can be manipulated to show hyperfocal distances at any aperture of a specific focal length. Now if you like shooting in heavy overcast, rain or whatever, you plug in your values and see what the dof is. Remember, you may have to shoot at a very low shutter speed in order to get a reasonable DOF in dark conditions; You should know your values needed. From what I remember cause it's been awhile, going outside with a 35mm camera at twilight or to take pictures of heavy rain clouds with 100 ISO film, my shooting parameters were F4 or larger and if I was lucky 1/30th of a sec with a 50mm lens. Many times I shot slower and with a larger aperture and needed a tripod with the camera. Hand held LF down in the 1/2-1/15 sec range with 400 film and a 135mm lens could be very normal on rainy days and easily in twilight from what I remember. Hope you can use the info.
http://medfmt.8k.com/brondof.html
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