Thanks. I will use your advice on the next project.The camera, iPhone or not, is not as important as the lighting and background. For small things I use a simple home-made photo "cube" and some people use pop up photo cube/tent like this: https://www.amazon.com/Perfect-2090-.../dp/B000UCEUQI
This is the one I made for almost nothing. The thin white cloth diffuses the light. I use a piece of mat board from the framing store bent into a curve at the back for a continuous background. The mat board is light or darker grey or tan depending on the look I want.
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I made this from PVC pipe and fittings so it comes apart easily. the side panels are glued up PVC and have the cloth held on with safety pins. The cross pieces are removable. I sit it on my table saw in the shop or on the table in the house.
Two lights, one on either side, sometimes a small light at the from for a highlight. To prevent conflicting color temperatures turn off all other lights in the room and shade the windows. Once the lighting is good the little point and shoot snapshot camera works fine as does the phone. I usually use it with a Canon DSLR which is easier to control. Always use a tripod if possible. For long shutter speeds to prevent camera shake it's best to use a shutter release cable or the self-timer.
Some example photos:
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JKJ