Why does my 24-105 have a different magnification (macro ratio) from a 105mm macro lens at same MFD?

Started Jul 28, 2022 | Questions thread
Tom Axford Forum Pro • Posts: 10,744
Re: Why does my 24-105 have a different magnification (macro ratio)

Monicaa wrote:

FrancoD wrote:

I bet you are glad you did not ask in the technical forum section....

This is very fascinating, I've spent the last couple of days reading more and more into it, but I can't say I'm any clearer on it haha

Single elements? I can do that. Double elements? I can even figure that out! But when you get to the complexity of these formulas intuition goes out the window.

I'm going to re-read everything another few times, because I think all the info is here to explain this, I just need to make sense of it.

I actually ordered the Sigma DG DN 105 macro to experiment and see if having each lens in hand will help me intuit an understanding. Any excuse for GAS

Unfortunately, having both lenses probably will not help you much.  If you remove the lens, there is probably no way for you to set it to its minimum focus distance and do experiments with it in that setting.

However, you probably can experiment with the lens at its infinity focus setting, which will be interesting even if not totally relevant.

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