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Thread: k mount to eos?

  1. #1
    Ausphotography Regular paulheath's Avatar
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    k mount to eos?

    hi all, i have just been given a sigma 35-70 f2.8 -4 zoom master, now the guy who gave it me said he could not remember the camera it was attached to, im thinking pentax k mount, and if so anybody had any experience with the k mount to eos adaptor? or should i just fit a reverse ring on it and use for macro lol..cheers
    long live
    www.paulheathphotography.com.au
    Canon 7D, and a lot of other bits and bobs


  2. #2
    Administrator ricktas's Avatar
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    You can get manual (just a plastic ring) adaptors, but you cannot get electronic ones, so the lens would need to be manually focused, fstop set etc. The plastic ones can generally be found on ebay.

    I recall someone developing an electronic conversion ring a couple of years back, but not heard anything about it since, maybe it was to expensive or did not work as they hoped.
    "It is one thing to make a picture of what a person looks like, it is another thing to make a portrait of who they are" - Paul Caponigro

    Constructive Critique of my photographs is always appreciated
    Nikon, etc!

    RICK
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  3. #3
    Ausphotography Regular
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    I’ve used the Fotodiox Brand. They are metal (brass and coated), quality machining and were about $30 - $40 AUS including postage a few years ago. I can recommend those.

    The Register Difference between EOS and K Mount is not much. (EOS 44.00mm) and (K Mount 45.46mm) so the adapter is slim.
    K Mount lenses have an aperture pin: you need to be careful on some EOS cameras - the aperture pin can hit the mirror.
    You can choose to perform surgery on the lens, to remove the Aperture Pin

    If I had an AF and AE lens, such as the EF24 to 105F/4L IS USM, I could not foresee the need to ever use a 35 to 70 F/2.8~4 Sigma Lens, manually, on an EOS camera.

    Inverted with a Reversing Ring, a Prime Lens (on a Prime lens) is usually better for macro work.

    WW

  4. #4
    It's all about the Light!
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    Buy a Pentax body
    regards, Kym Gallery Honest & Direct Constructive Critique Appreciated! ©
    Digital & film, Bits of glass covering 10mm to 500mm, and other stuff



  5. #5
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    I have an adapter, its brass coated, and confirms your manual focus with a beep. There's usually a ton on ebay less than 20bucks posted.
    CC allways appreciated!
    My gear Canon 1100D, Tamron SP70-300mm F/4-5.6 Di VC USD lens, and Canon 18-55 EFS lens.

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