Rebel XT - 100mm or 100mm macro

Discussion in 'Digital SLR' started by john cuthbertson, Jun 13, 2007.

  1. Not sure on which one to purchase - the 100mm or the 100mm macro. I mostly
    shoot auto / motorcycle racing and other events with some social photography
    thrown in for good measure. Suggestions would be appreciated!

    Rebel XT
    50mm f1.8
    200mm f2.8L II USM
    john cuthbertson, Jun 13, 2007
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  2. john cuthbertson

    RichA Guest

    Do you need to produce images from 1:2 imagings, that is, images of
    things 2" across fit onto your sensor? If not, don't get the macro.
    RichA, Jun 13, 2007
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  3. john cuthbertson

    jean Guest

    I bet your 200 is great for racing, get a 1.4X teleconverter when you want
    to get a bit more reach. The 100mm macro would not be good for racing, the
    focus is not fast enough, I don't think the 100mm f2 would be fast enough
    either. I use a 24-105 f4 L IS as a day to day lens, it has worked well for
    bicycle racing where you can get close enough to fill the frame, for
    auto/motorcycle racing, it would not have enough reach, I use a 70-200 f2.8
    L along with a 1.4X TC, this combo works well on a 30D.

    jean, Jun 13, 2007
  4. Hello John.

    I would go for the macro.

    Macro photography is great fun. If you have a go using close-up lenses and
    you like the results then you will end up by buying a macro lens. By the
    way, I would always go for the 100mm Canon macro in preference to the Sigma
    105mm macro. The Sigma is slower, hunts more when focussing and is clumsier
    to switch from auto to manual focus.

    By all means have a look through the reference books about macro photography
    but the best way to find out about it is to try it for yourself.

    Regards, Ian.
    Fred Anonymous, Jun 13, 2007
  5. The 100mm macro will probably do, but unless you want/need
    macro, ...
    AF is something you usually don't use at all in macro photography.
    You focus by moving the camera back or forward ...
    Yep, see how the lens feels ...

    Wolfgang Weisselberg, Jun 13, 2007
  6. Hello again. I have to admit that I do use autofocus in my macrophotography.
    There is a reason for this - I usually have the camera in one hand and a
    reflector or flash or a piece of the vegetation (keeping it off the subject)
    in the other hand. Moving backwards and forwards is then not something that
    I can do easily.

    Regards, Ian
    Fred Anonymous, Jun 14, 2007
  7. john cuthbertson

    King Sardon Guest

    You probably mean close-up photography. If you are not at a very high
    magnification, autofocus works pretty good. Macrophotography is
    supposed to mean approx. 1:1 photography (by which I mean that the
    subject and image have about the same size.)

    It's hard to autofocus at 1:1 because for one thing, the effective
    aperture is now twice what it was at infinity (f/4 becomes f/8) and
    autofocus usually needs a bigger aperture... and for another thing,
    when you are at 1:1, focusing using the focus ring (whether auto or
    manual) changes the image size without changing the focus that much.

    King Sardon, Jun 15, 2007
  8. john cuthbertson

    Paul Furman Guest

    For action shooting the AF on a macro lens will not be satisfying in my
    experience macro AF is designed to move slowly & tediously.
    Paul Furman, Jun 19, 2007
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