Sigma 70-300mm Sony/Minolta mount lens - a warning

Discussion in 'Sony' started by Calvin Sambrook, Oct 23, 2009.

  1. Calvin Sambrook

    Guest Guest

    try to yes, but you *can't* please everyone, and in some cases it's
    cheaper to send the customer packing.

    in fact, i know of one company that not only refunded the purchase
    price, but *paid* for the customer to get a competing product. the
    customer was nothing but trouble, constantly calling tech support, and
    wasting everyone's time.
    Guest, Oct 25, 2009
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  2. Calvin Sambrook

    Bob Larter Guest

    Rubbish. Back when I ran a service department for a computer products
    company, I was able to convince management to fire several troublesome
    clients by proving that they were actually costing us money.
    Bob Larter, Oct 25, 2009
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  3. Calvin Sambrook

    Noons Guest

    Bob Larter wrote,on my timestamp of 25/10/2009 3:43 PM:
    I wonder why you stopped running that service department?
    Noons, Oct 25, 2009
  4. That's a bit harsh, accepting that Sigma are at the cheaper end I'd expect
    performance which wasn't as good as more expensive lenses. Slower focus,
    softer, more CA, noisier - they are all things which one can choose to
    accept in a cheaper lens or one can decide those matter to you enough to pay
    more. A life of two months is definitely unacceptable.

    In the UK we now have a reasonably strong Sale of Goods Act which has an
    assumption that (for non-perishable goods) if something breaks in the first
    6 months it was was faulty at purchase unless the retailer can prove
    otherwise. People are only just waking up to what that means in practice
    and it can be hard work enforcing your rights (that will be the subject of
    another post one day) but it does mean that manufacturers like Sigma can no
    longer get away with the sort of things they once did.
    Calvin Sambrook, Oct 25, 2009
  5. Calvin Sambrook

    Robert Coe Guest

    : In article <>, Alan Browne
    : > Yep. Whatever grudging acceptance I've had for Sigma has been reduced
    : > to "avoid" with the lensrentals saga.
    : agreed, along with their blatant lies about their cameras.

    If money grew on trees, we'd probably all have mostly Canon or Nikon lenses,
    with the occasional Sigma (30mm f/1.4) or Tokina (11-16) thrown in. But it
    doesn't, so we make compromises. My wife and I have four Sigma lenses
    (including the 30mm) and are not at all unhappy with them.

    Does anybody actually buy Sigma's cameras? I'm pretty sure I've never seen

    Robert Coe, Oct 25, 2009
  6. Calvin Sambrook

    Guest Guest

    a few people do but it's a tiny tiny minority. sigma's market share is
    well under 0.5%.
    Guest, Oct 25, 2009
  7. Calvin Sambrook

    Guest Guest

    for you, but you don't speak for everyone. i think his point is that
    the third party lens makers make lenses that nikon/canon do *not* make.
    some third party lenses definitely deliver, just as some nikon/canon
    lenses do not. it all depends on the particular lens.
    Guest, Oct 25, 2009
  8. Calvin Sambrook

    Guest Guest

    it's not just very good. it's *excellent*, one of the best macro lenses
    how 'bout that 200-500mm f/2.8 :)
    Guest, Oct 25, 2009
  9. Calvin Sambrook

    Miles Bader Guest

    Indeed. There have been, and are, great lenses from 3rd parties, and
    there are also of course crap lenses from OEMs.

    I dunno what on earth Navas was thinking when he posted that, since it's
    such an obviously silly statement. While many camera makers are also
    excellent lens makers, they certainly have no monopoly on that, and
    since (current) lens mounts are a simple and well-defined interface,
    they enjoy no particular advantage over others when making lenses for
    their own platform.

    Miles Bader, Oct 25, 2009
  10. Calvin Sambrook

    Guest Guest

    i seem to recall he said he bought a third party lens once and got
    burned, so he refuses to buy any other third party lenses, no matter
    what. apparently he is not aware of the duds that nikon/canon make.
    true, but the exact mount protocol is still reverse engineered, and
    many times not particularly well.

    sigma in particular is known for needing lenses rechipped to work on
    newer cameras. sigma also cheaps out and reuses cpu chips, which means
    one lens might share its lens id with another lens, and that means that
    the exif information in the photo will show incorrect data. it also
    means that there can be a serious problem with the cameras that provide
    for focus adjust, since they look at the mounted lens id to know
    whether to apply a particular adjustment. it's actually amazing sigma
    gets away with this crap.
    Guest, Oct 25, 2009
  11. Calvin Sambrook

    Guest Guest

    i did say one of the best, not *the* best.
    the 50-500 is nothing at all like the 200-500 f/2.8:

    Guest, Oct 25, 2009
  12. Calvin Sambrook

    Guest Guest

    the 50-500 is known as bigma and the 200-500 is known as sigzilla. it's
    ridiculously impractical, but it definitely got them publicity.
    Guest, Oct 25, 2009
  13. Calvin Sambrook

    J. Clarke Guest

    This makes it sound like Sigma is reverse-engineering to because they are
    too cheap to pay for a license, when in fact Canon claims that NOBODY has
    been provided the EF specification.
    J. Clarke, Oct 25, 2009
  14. Calvin Sambrook

    Guest Guest

    according to this post, tamron and cosina have agreements in place:


    Only Tamron and Cosina have such a agreements in place, which is why
    you don't hear about those lenses needing to be rechipped the way you
    continually hear about Sigmas and Tokinas. My own Sigma 30mm f1.4
    needs to go in to be rechipped for compatability for my Nikon D200.

    Check the Japanese IP law journals, there have been a couple of
    interesting suits between Sigma and Canon. Not what one calls a
    "working relationship".
    Guest, Oct 25, 2009
  15. Some of us do buy their cameras and like them. Being a Sigma DSLR user,
    I've got a fair number of their lenses and have experienced problems with
    only one. Sigma USA's customer service is excellent in my experience and
    the experiences of other Sigma users I'm in continual contact with.
    Pete Stavrakoglou, Oct 26, 2009
  16. The Sigma 70mm and 105mm macro are also some of the best macro lenses in
    that range.
    Pete Stavrakoglou, Oct 26, 2009
  17. Pete Stavrakoglou, Oct 26, 2009
  18. Calvin Sambrook

    Guest Guest

    the cool thing about it is that they can *all* fit into one big room at
    the same time!
    there are a *lot* of posts in the sigma forum on dpreview with various
    problems. the sd14 has lockups and writes corrupted files, the dp1 and
    dp2 have a lovely red grid problem, the lens mechanism fails, the
    autofocus is slow, battery drains in hours even when not using it, etc.
    i've seen posts where sigma usa rejected repairs and claimed 'customer
    damage' followed by fanbois saying 'you packed it wrong' or some such
    garbage. always the user's fault, never sigma.

    there are also posts where a camera or lens had to be sent to sigma
    japan for 2-3 *months*, only to have it come back with a different set
    of problems.
    Guest, Oct 26, 2009
  19. Calvin Sambrook

    Bob Larter Guest

    I've bought one Sigma lens. Never again. All my others are genuine Canons.
    Bob Larter, Oct 27, 2009
  20. Calvin Sambrook

    Bob Larter Guest

    It was because the company was acquired by a pair of morons who thought
    that an MBA was a good substitute for actually knowing how to run a
    business. After putting up with several months of bullshit from them, I
    quit to join a friend's DotBomb business.
    Bob Larter, Oct 27, 2009
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