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Reversing 50mm?

Started Feb 12, 2022 | Questions thread
gardenersassistant Veteran Member • Posts: 9,656
Re: Reversing 50mm?

3D Gunner wrote:

gardenersassistant wrote:

I don't understand what you have in mind for "reverse to the adapter".

"Reverse to adapter" provides a different distance (the correct one) between the sensor and the front lens of the inverted optics, than "reverse to body".

How does that work in practical terms? For example, suppose I want to reverse mount an FD lens on to an MFT body. If I put an FD to MFT adapter on the body it presents an FD mount to attach to. Do I then put an FD reverse adapter on to the FD to MFT adapter, and then attach the lens to the reverse adapter?

So, the solution is "reverse to adapter" (and it works very well).

What are the benefits of reversing to adapter rather than reversing to body? Sharper images? Less aberrations? More magnification? A greater range of magnification? With my two experiments the shorter focal length produced the greatest magnification, but changing the focus between infinity and nearest focus didn't change the magnification for one of them, and only changed it a small amount for the other one. Is that normal with lenses that are reversed to body? Do you get a better range of magnifications when reversing to adapter? (Unfortunately I only have the reversers needed for reverse to body and don't have the reversers needed to experiment with reverse to adapter, hence my questions.)

The magnification ratio and the effect on the image captured on sensors of different sizes needs another discussion.

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