michaelphillips Posted February 21, 2019 Share Posted February 21, 2019 I am wanting to use my canon 5d mark iii to digitize my negatives. I have an old canon FD 100 mm macro lens and bought a fotodiox FD to EOS adaptor. I have removed the glass in the adaptor. I am experiencing vignetting. any ideas as how to correct this? Thanks. Link to comment Share on other sites More sharing options...
glen_h Posted February 22, 2019 Share Posted February 22, 2019 With the length of the adapter, without a lens, the combination would focus very close. So, the adapter has a lens which compensates, and this also expands the image to fill the frame. I presume, then, that there is a hole (where the lens was) much smaller than the frame size. You need to remove enough of that. -- glen Link to comment Share on other sites More sharing options...
alan_olander1664878205 Posted February 24, 2019 Share Posted February 24, 2019 The EOS mount has a larger internal diameter than the FD mount. Basically, the "hole" is too small. Link to comment Share on other sites More sharing options...
michaelphillips Posted February 25, 2019 Author Share Posted February 25, 2019 The EOS mount has a larger internal diameter than the FD mount. Basically, the "hole" is too small. thanks, that is not what i wanted to hear. Link to comment Share on other sites More sharing options...
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