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Canon 20mm f3.5 Macro Bellow Lens

Started 4 months ago | Discussions thread
ken_in_nh Senior Member • Posts: 2,399
Re: Focusing a tube lens, empty magnification, and other stuff
1

all great in theory, but experimenting with optics can be full of surprises.  We're not talking about theoretical perfection, but what's achievable in practice.

As a former bench scientist, I can cite endless examples of the departure of practice from theory.

That's why I encourage the OP to experiment a bit.  You may say it's a waste of time, but I don't agree.  Many real life situations don't comport perfectly with theory.

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