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Adapter Canon EF to Pentax 645

RBL 8 53

18 Aug 2016 7:21AM

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Hi. Is there an adapter that will enable me to use my canon EF lenses on a Pentax 645D? Many thanks.

Chrism8 14 977 28

18 Aug 2016 8:16AM

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IMO, its kind of pointless, as the 645D sensor is 1.7x approx. larger than the size of your canon sensor, the effect would be like shooting through a telescope, they are available to do the reverse, Pentax 645 to Canon ?

A quick google search which you may or may not have done, didn't bring anything up regarding Canon to P645

franken Plus

18 5.2k 4

18 Aug 2016 8:16AM

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There's these on EBAY.

http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.TRS0&_nkw=Adapter+Canon+EF+to+Pentax+645&_sacat=0

ikett 10 545

18 Aug 2016 9:00AM

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Quote:There's these on EBAY.

Looks they're for using Pentax lenses on Canon EOS, may be wrong though.

RBL 8 53

18 Aug 2016 9:10AM

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Ah. That would make sense. It's the sensor size of course!

bainsybike 11 337

18 Aug 2016 2:14PM

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Quote:Ah. That would make sense. It's the sensor size of course!

Also the flange distance (ie distance from the lens mounting flange to the sensor), which is greater for the Pentax than the Canon. You can use an adaptor do increase the flange distance, but not to decrease it.