With everyone making and using digital apps applicable to LF photography, let me float an idea for an app: Something that will help me preview a scene by simulating different focal length lenses. This would be used as a composition previewing too, basically.Right now I use a small piece of plastic with a rectangular frame cut out of it, which I hold at various predetermined distances from my face and I look through it in order to determine how a scene will look if I use different focal length lenses, but it seems to me that being able to do this digitally using a cellphone camera would be a great idea esp since you can then really compare the different framings in a single shot simultaneously and maybe see how things look in black and white, etc.
Of course, considering how inept I am with digital things, a much better tool is probably in existence that I have no idea about, right? I suppose a digital camera with a zoom lens can sorta do this but I would figure out how to set a dslr lens focal length to, say, match the view from a 240 mm lens that has a 45degree angle of view on and 8x10 camera, without doing a hell of a lot of math. Instead if I could just take a shot with a cellphone camera, and the app automatically shows the composition with different focal length lenses, that would be useful I think
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