# Problem with heavy Vignetting

**URL:** <https://forums.negativelabpro.com/t/problem-with-heavy-vignetting/1300>\
**Category:** Digital Camera Scanning\
**Created:** [February 19, 2020, 9:41am UTC](https://forums.negativelabpro.com/t/problem-with-heavy-vignetting/1300 "2020-02-19T09:41:36Z")\
**Posts on this page:** 1\
**Showing post:** 19

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**Author:** ![Digitizer](https://avatars.discourse-cdn.com/v4/letter/d/57b2e6/32.png) [@Digitizer](https://forums.negativelabpro.com/u/Digitizer)\
**Post date:** [May 3, 2020, 6:50am UTC](https://forums.negativelabpro.com/t/problem-with-heavy-vignetting/1300/19 "2020-05-03T06:50:44Z")

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I still have a Mamiya 645 and a set of lenses. I’ve used them on an EOS 5D Mark III with a Fotodiox Adapter with focus confirmation chip, which came off, luckily outside of the camera.

I reverse mounted the 80mm lens, also with extension rings and it worked fine, albeit a bit clunky, also because aperture is fully manual which adds a few steps for each shot. Well, I also have a Canon EF100mm Macro lens which is much easier to use. Maybe it’s an idea worth considering to buy an original macro lens or a set of extension rings instead of spending some effort for a kludge which could make you cave in and buy the macro lens anyway…

Find my current setup [here](https://forums.negativelabpro.com/t/how-to-adjust-for-low-distortion/1676).

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