Reconciling the Thick Lens Model with P2P Optical Bench

Started 3 months ago | Discussions thread
OP Garry2306 Regular Member • Posts: 108
Re: Reconciling the Thick Lens Model with P2P Optical Bench

Alan

Thanks for the response, BTW I was not thinking about macro, I just ‘randomly’ chose the Canon macro lens as Bill has focus control on this one

I know I’m looking at a lost cause.

Bottom line: I’ll carry on using my DOFIS model, eg https://photography.grayheron.net/2020/12/lens-simulator.html, as a reasonable model when undertaking in camera focus bracketing using Magic Lantern or CHDK Lua scripts.

BTW I always smile when I read some talking about the importance of the circle of confusion when deriving DoF, but ignoring the pupil mag and the distance uncertainty, ie when you don’t know the location of the front principal or entrance pupil as focus varies.

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