800 Speed Not Good For High Zoom??

Discussion in '35mm Cameras' started by DonAllCity, Jul 28, 2003.

  1. DonAllCity

    DonAllCity Guest

    Hello, Ii'm hoping you can help me. I recently purchased the Pentax IQZoom
    170SL after reading many good reviews at various sites. I will be attending
    three concerts within the next couple of months and dont have super close
    seats, so I wanted a high zoom camera. I've been told that you cant go wrong
    with 800 film. I tried the camera out today with the 800 at a small event I
    attended. I used the zoom when I felt it was necessary. I just picked up the
    photos from the lab and some of them are horribly blurry. The ones that I
    didnt use a lot of zoom on seem fine, but the ones that I used the zoom are
    awful. Is it possible I used too much zoom? The highest zoom I ever used was
    70-90. If anyone can help or give me any advice on what to do to get good
    pictures at the concerts it would be much appreciated. Thanks!

    DonAllCity, Jul 28, 2003
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  2. DonAllCity

    Jim Townsend Guest

    Well.. ISO800 film helps, but I just looked at the specs for the camera.

    At maximum zoom the lens specs are - 170mm @ f/12.8

    In a nutshell, the 170mm tells you the field of view (or magnification). The
    'f' number (f/12.8) tells you how big an opening you have in the lens tube to
    let light through to the film. The smaller the opening, the bigger the 'f'

    Lens ratings like f/2.8 or f/4.5 would be good low light 'f' numbers with f/2.8
    being the best of the two.

    f/12.8 is *horrible* for taking pictures in low light because the opening is
    just too tiny to let in enough light in your application. In order to get the
    required amount of light, the shutter has to stay open longer. That results
    in blurr.

    If 800 film isn't working, then I don't think the camera is capable of doing
    what you want.
    Jim Townsend, Jul 29, 2003
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  3. DonAllCity

    Alan Browne Guest

    I suggest you read Jim's post
    Alan Browne, Jul 29, 2003
  4. Donna, even with 800 speed film the lens speed is nadequate to cope
    with stage lighting. You need a very fast lens, something like a 180mm
    f/2.8 lens for this kind of work. Translation? $$$$$$$$$$$$
    Michael Scarpitti, Jul 29, 2003
  5. Maybe she should buy a Leica.
    Pete McCutchen, Jul 29, 2003
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