Joe Smigiel
26-Mar-2012, 07:55
I have an old Polaroid Miniportrait model 454 camera that takes 4 images on a single sheet of film. As near as I can figure, it has 4 lenses of focal length ~68.5mm set to focus at a subject distance of 120mm. The focal plane appears to be about 160mm back. The camera body is rigid.
I want to focus on a subject to produce a full length portrait so the object size would be approximately 1,800mm for an image size of about 60mm.
Can anyone tell me what diopter I need to add to the camera lenses to achieve this? I think I'd need to end up with a focal length of ~147mm.
I thought it would be a neat way to create a modern multiplying camera to shoot tintypes with.
Joe
I want to focus on a subject to produce a full length portrait so the object size would be approximately 1,800mm for an image size of about 60mm.
Can anyone tell me what diopter I need to add to the camera lenses to achieve this? I think I'd need to end up with a focal length of ~147mm.
I thought it would be a neat way to create a modern multiplying camera to shoot tintypes with.
Joe