Camera board • Which lens(es) to get to focus on a given area at a given distance

So I want to use the Pi HQ camera https://thepihut.com/products/raspberry ... era-module for a science project.

But there is a bewildering array of lenses, and I've no idea how to select the right one. I'm hoping some kind soul here can help me out please..
https://thepihut.com/collections/raspbe ... era-lenses

My subject area is 4cm square.

I have two choices to mount the camera:
- approx 7cm distance from the subject
- approx 12cm distance from the subject

Distances are approximate - as this is the closest possible point in each case. i.e. the lens and camera body cannot come closer than this.

I calculated the field of view using trig to be : 32degrees for 7cm , and 19degrees for 12cm - but Ive no idea how to select an actual lens, and know it can focus at the distance specified.

Ideally if there is a lens that can work for both distances that would be cool - otherwise , what lens should I use for each distance?

Thanks!

Statistics: Posted by cybotic — Sat Oct 26, 2024 12:35 pm

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