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03-13-2018, 11:35 AM   #1
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EOS to Pentax Lens mount adaptor

Hi
I have a Pentax K-r and am looking for a lens mount adaptor so I can use a Sigma DG 150-500mm 1:5-6.3 APO HSM lens which fits a Canon EOS M EF-M
Can anyone suggest where I can obtain one of these or if they are even made.

03-13-2018, 11:44 AM   #2
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QuoteOriginally posted by Ryalux Quote
Hi
I have a Pentax K-r and am looking for a lens mount adaptor so I can use a Sigma DG 150-500mm 1:5-6.3 APO HSM lens which fits a Canon EOS M EF-M
Can anyone suggest where I can obtain one of these or if they are even made.
You can go the other way, but I don't think the EOS-M lens would work on a K-mount camera because of the short registration distance.

Adam
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03-13-2018, 11:58 AM   #3
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QuoteOriginally posted by Adam Quote
You can go the other way, but I don't think the EOS-M lens would work on a K-mount camera because of the short registration distance.
Thanks Adam.
Just been told it is actually an Lens mount‎: ‎Canon EF/EF-S not sure if that makes a difference.
03-13-2018, 12:03 PM - 1 Like   #4
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QuoteOriginally posted by Ryalux Quote
Thanks Adam.
Just been told it is actually an Lens mount‎: ‎Canon EF/EF-S not sure if that makes a difference.
Nope, it still can't be adapted unfortunately. However, that same lens is also available in the Pentax mount if you can get one.


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03-13-2018, 12:48 PM - 1 Like   #5
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An adapter, if one existed, would be a short teleconverter because of the focal flange distance. The aperture on EF mount is electronic, so you would be limited to whatever one aperture. There would be no autofocus either.

As Adam said, there is a K-mount version of the lil'Bigma. Two actually, one with OS and one without.
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