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02-21-2014, 07:10 PM   #1
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Adaptor to use nikon f mount on 645n

I've got one of the new petzval lenses put out by lomography, it's a nikon f mount, anyone know of an adaptor to mount the lens on a 645 a mount,

I can find a whole slew to mount 645 lenses on nikonn, but not the reverse.

Thanks.

02-21-2014, 07:29 PM   #2
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You can't use f mount lenses because they don't cover the full image circle on medium format.

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02-21-2014, 07:30 PM   #3
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A nikon f mount won't cover the image circle required for a 645, so its unlikely you find an adapter.

If you did find one the image will most likely suffer from very heavily vignetting.
02-21-2014, 08:41 PM   #4
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There's also the little issue that even if the lens covered the 6x4.5cm image circle, you'd still have to do something about the 24mm longer flange distance.

02-21-2014, 09:11 PM   #5
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Thanks for the help gents.
02-28-2014, 02:32 PM   #6
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A kickstarter campaign just ended wherein the project is making a Petzvar (their name) for Pentacon Six (easy to adapt to Pentax 645 with, well an adapter).

QuoteQuote:
PETZVAR f/3.8 120 mm medium format Petzval fine art lens
https://www.kickstarter.com/projects/1162663202/the-petzvar-f-38-120-mm-medi...t-petzval-port

Hopefully, Denys (Kickstarter project lead) will have these out soon and I'll try and post some images with my copy.

QuoteOriginally posted by Tyjonesandco Quote
I've got one of the new petzval lenses put out by lomography, it's a nikon f mount, anyone know of an adaptor to mount the lens on a 645 a mount,

I can find a whole slew to mount 645 lenses on nikonn, but not the reverse.

Thanks.
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