Old Sigma APO 70-210 f2.8

Discussion in 'Digital Photography' started by mdguest, Dec 22, 2005.

  1. mdguest

    mdguest Guest

    I have just bought a Sigma (Canon mount) 70-210 f2.8 APO zoom lens, but
    I don't seem to be able to switch it to AF. Instead of a switch it has
    a ring with AF and MF and a marker, I guessed that you should simply
    twist the ring to select AF, but is doesn't move. I am not totally
    convinced that this is the selection method as the ring is not
    rubberised as are the zoom and focus rings.
    I have e-mailed the seller but not had an answer. Anyone else know
    anything about this lens? (eBay itme No. 7567759647)
    mdguest, Dec 22, 2005
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  2. mdguest

    Skip M Guest

    Don't know about the Sigma, but my Tokina, you push or pull the focus ring
    fore or aft to switch from AF to MF...you might try that.
    Skip M, Dec 23, 2005
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  3. I had that lens , and I think it is a switch in the ring, why it does
    not work?

    photochimperdude, Dec 23, 2005
  4. mdguest

    Deedee Tee Guest

    By any chance is there a small button on or near the AF/MF ring that
    you have to press before you can turn the ring? Some Nikkor lenses
    have such an arrangement.
    Deedee Tee, Dec 23, 2005
  5. mdguest

    mdguest Guest

    No, I can't see any button, that is waht I kind of expected myself.
    mdguest, Dec 23, 2005
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