Speedboosted footage with medium format lenses

[Aussie Ash]

Mamiya 45mm f2.8 645 and 2 soviet lenses for 6x6 Pentacon six or Kiev-88

 

[Aussie Ash]

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[eatstoomuchjam]

Speed boosting a 45mm f/2.8 lens onto a smaller sensor with a 0.71x converter gives you a 32mm f/2 lens.  That's it.  If you like the character of the medium format lens, that's great and it's a worthwhile endeavor.  But aside from the character unique to that model of lens, it won't look appreciably different from a 32mm f/2 lens that was made to cover the format you're adapting to.

That said, I've been thinking about building graflok DOF adapters that I could stick on some of my medium and large format cameras - not because there is an intrinsic medium or large format look, but because I have some really interesting older lenses and when I adapt them to smaller formats, I'm just using the pretty good/well-corrected centers of the image circle and not the cool outer edges where things get interesting/cool/weird.  I think a medium format one might be my next project after I finish the M mount for the UC12K (which is looking like it will be tomorrow sometime?).  I have a kind of beat up, but otherwise unmarked 6x9cm ground glass handy.  It'll at least be good enough for a proof of concept.  Most of my 4x5 stuff has either a fresnel (visible lines!) or grids on the GG, but I also have at least one spare 4x5 GG lying around that I could use for a proof of concept.  Oh, and now that I think of it, I have an old Seroco 4x5 which has clean GG and I think it's from the 1920's or so - maybe I have a project for tomorrow while I wait for another iteration of my UC12K mount to finish printing (now that I'm near the end and printing the entire part, the prints are taking about 3 1/2 hours each).

[Aussie Ash]

The 0.71 speedbooster to Mamiya 645 is around Aus  $700 so not on the XMas list.I am quite happy with my present rig