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Using Focal Reducers On Full-Frame Bodies

Started Jul 13, 2014 | Discussions thread
ZeilSam New Member • Posts: 3
Re: Using Focal Reducers On Full-Frame Bodies

I know I'm a little late to the game here, but what I was wondering if one were to use a lens with a huge image circle, say a Mamiya 645 lens speed boosted from full frame camera:

https://www.bhphotovideo.com/c/product/1455801-REG/kipon_baveyes_mamiya645_s_e_adapter.html/?ap=y&ap=y&smp=y&smp=y&lsft=BI%3A514&gclid=Cj0KCQjws_r0BRCwARIsAMxfDRha8bYuIBA8kvolHWEmdgjIVN9FVtjKleIejxEerR9Jf205zHYF1H8aAh3CEALw_wcB

but then have that full frame camera... boosted to full frame?:

https://www.bhphotovideo.com/c/product/1314354-REG/metabones_mbspef_e_bt4_ef_to_e_speed.html

My wonder is whether or not the combination of the focal reducers have a large enough image circle as to not get any vignetting... My thought for this would be that it would be awesome to have made a sort of 65mm film sensor without actually having a 65mm film or digital film camera. Thanks!

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