Evening

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2
votes
2answers
2k views

How to measure distance to subject in Depth of Field calculator?

I used Depth of field calculator here. I should specify subject distance. How to measure distance to subject? In theory this is a distance to front principal plane or point. What is in practice? I ...
10
votes
2answers
2k views

Is it possible to measure distance to an object by adjusting the focus?

This is maybe not a 100% on topic photography, but I couldn't find a better stackexchange site to post this on and maybe you guys can help me out. I have a camera that takes pictures of a production ...
10
votes
6answers
2k views

How to micro-adjust distance for focusing in macro photography?

I'd like to take macro photos, but I have a problem with the focus. I put the object on a (light) table, I put my camera on my tripod and take a few shots. Since the depth of field is very small ...