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Does the MC-11 adapter allow to retain the full frame sensor from Sigma 18-35mm f 1.8 EF lens to Sony E Mount body?

Sony A7iii camera body

3 Answers

  • keerok
    Lv 7
    2 months ago

    The MC-11 adapter merely allows you to physically connect a Canon EF-mount lens to a Sony E-mount body. The size of the sensor (of the camera) is never affected. 

    If you mount a lens made for APS-C cameras to a full-frame camera, the image projected by that lens won't fully cover the full-frame sensor thereby producing a smaller image with fuzzy dark borders. Some full-frame cameras can automatically adjust the image, removing those ugly borders. You still can't deny the fact that the full-frame sensor is not fully maximized though.

    One other concern is that some APS-C lenses have protruding rear elements which may get in the way of the reflex mirror in a full-frame dSLR. That would be a very expensive repair job if ever but most probably, the adapter avoids that.

  • Sumi
    Lv 7
    2 months ago

    No, because the lens is not designed for full-frame (35mm) cameras.

    Because the Sigma 18-35mm f/1.8 EF is specifically designed for APS-C format cameras, it projects an image circle large enough for an APS-C sensor.  Therefore, if you use the lens on a full-frame camera you'll get a lot of vignetting.  The MC-11 won't help.  In short, you can't use any lens on a larger-format camera that it was designed for.  Now, there are cameras, Nikons come to mind, that have a crop mode which allows one to use APS-C (DX) lenses on full-frame (FX) bodies.  In crop mode, the camera automatically crops out the vignetting.

  • 2 months ago

    I'm not sure what you're asking, but if you want to know if the adapter will make a lens designed for APS-C suitable for a full frame sensor the answer's no.  At best you'll get severe vignetting.

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