Anyone tried change chip on Sigma 300 f4 APO Macro for 10D

Discussion in '35mm Cameras' started by jp, Aug 6, 2005.

  1. jp

    jp Guest

    I can not fined any information
    Please help.
    Best George
    jp, Aug 6, 2005
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  2. jp

    ian lincoln Guest

    you have to contact sigma. if your lens is under warranty they should chip
    it for free. Outside then they will charge.
    ian lincoln, Aug 6, 2005
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  3. jp

    jp Guest

    No warranty-7y old.
    I want to now if is possible to rechiping this lens?
    best George
    jp, Aug 6, 2005
  4. Have you checked Sigma's website? At one time they had a list of "chippable"
    Malcolm Stewart, Aug 6, 2005
  5. jp

    Mark² Guest

    All this fiddling is just one more reason why the "savings" one might gain
    via a Sigma purchase is only temporary, because you "pay" it later in
    on-going hastles and future insecurity concerning reliability and

    Mark², Aug 10, 2005
  6. jp

    jp Guest

    the problem is : I have the lens already.
    jp, Aug 10, 2005
  7. jp

    Eric Miller Guest

    Yep, most of the Sigma haters ignore that issue though they certainly have a
    point when they raise compatibility issues. Just call or e-mail Sigma. They
    will let you know if they can or will rechip the lens. They will rechip
    lenses for free even when the lens is not under warranty. I don't know if
    they do this all the time, but I sent a lens I bought used and they
    rechipped it for my Canon 10D without any charge and did it pretty quickly.
    They generally will not re-chip lenses that aren't in production anymore.

    Eric Miller
    Eric Miller, Aug 11, 2005
  8. jp

    Mark² Guest

    There is nothing "Sigma hating" in pointing out why a Sigma purchase is not
    quite the bargain it initially seems.
    Mark², Aug 11, 2005
  9. Sigma has rechipped my 300 f4 APO for free. Unfortunately, the
    aperture is now at 5.6 because the proper chip is not available.
    Before I sent back to Sigma, my lens functions only on aperture
    priority mode. I will stay away to have it rechip if you can help it.
    william.y.chiu, Aug 11, 2005
  10. jp

    jp Guest

    Can you still use f4 with Av mode?
    Best jp

    jp, Aug 12, 2005
  11. The facts I know:

    Sigma will rechip current lenses within warranty for free.
    Sigma may rechip lenses which are still in production for free.
    Sigma might rechip some of the former lenses, free or cheaply.
    Sigma can't rechip every of their former lenses..

    .... and mostly: Sigma did not licence the chip protocols. They reverse
    engineered it only. AFAIK Tokina/Tamron licenced the protocols. I don't
    know about Cosina & Co.

    Thus a current lense may operate with a current body. But you'll never
    have a warranty about compatibility with future enhancements.

    I'd like to know: is this a Canon only story? Is there any mount where
    Sigma uses the official protocol (apart from Sigma itself)?
    [x] Sigma
    [ ] Canon
    [ ] Nikon (D)
    [ ] Minolta (D)
    [ ] Pentax
    [ ] Olympus 4/3

    Apart from that, there are other Companies which create certain
    incompatibilites on their own, such as

    Pentax: smc-F, smc-FA, smc-DA, smc-DFA

    However, that's always upwards and backwards compatible, as far as
    possible. Sigma may produce incompatibilites which may cause a complete

    - Martin
    Martin Trautmann, Aug 12, 2005
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