Lots of cheap zoom on a k1000

Discussion in 'Photography' started by Dean, Apr 27, 2004.

  1. Dean

    Dean Guest

    Im a super newbie with an old pentax k1000 and i need to do a lot of surf &
    rock climbing photos.

    Im gonna be using a 3x converter by vivitar and a 70-210mm centon lens. How
    much quality im I gonna loose, bearing in mind im not a pro.

    deano.
     
    Dean, Apr 27, 2004
    #1
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  2. Dean

    David Guest

    IMHO, you're going to get unsat photos. Low quality lens plus a 3x Vivitar
    converter (additional poor glass), plus the situation described below =
    unrealistic expectations.

    Additionally, though I haven't used a 2x converter in years (much less a
    3x)....don't you lose a stop when using a 2x, thus 2 stops when using a 3x?
    Combining this with a 70-210 centon (max aperture 4 to 5.6 based on internet
    searching), and you'll be shooting at an effective max aperture of 11. With
    the surfing photos, you'll probably want a faster shutter speed than normal,
    but you're up against the wall with the f11 aperture. You'd need support to
    hold the camera steady....your only realistic option (especially for
    surfing) is a monopod.

    Forget the 3x converter. Be content and creative with the 70-210.
     
    David, Apr 28, 2004
    #2
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  3. Dean

    Dean Guest

    I have no problem in using a tripod to get the shots I need, will it be ok
    if I do?

    I can manage on occasions with the 210mm i think but sometime, when the
    action is 1 or 2 hundred yards away its not going to give me enough I
    reckon.

    dean.
     
    Dean, Apr 28, 2004
    #3
  4. Dean

    David Guest

    using a tripod for surfing shots? I haven't shot surfing, but I'd think that
    you'd need to be more free moving than what a tripod allows.

    i can't tell you the exact results you're going to get. try it. just don't
    expect much.
     
    David, Apr 28, 2004
    #4
  5. Dean

    RSD99 Guest

    "David" posted:

    "... don't you lose a stop when using a 2x, thus 2 stops when using a 3x? ..."

    No.

    You lose 1 stop at 1.4 x
    You lose 2 stops at 2 x
    You therefore would lose 3 stops at 3 x

    That would be a rather seriously dim finder ... and slow shutter speed ... if you started
    with something like a 70-210 f/4.5-5.6 ...

    "David" additionally posted:
    "... and you'll be shooting at an effective max aperture of 11. ..."

    Actually ... Think about a very fuzzy 630 mm f/16 ...

    Surfing pictures ... instead of the 3x Vivitar teleconverter ... IMHO you'd be better off
    getting a cheap 500 mm mirror lens AND a very good tripod with a fluid head.
     
    RSD99, Apr 28, 2004
    #5
  6. Dean

    Dean Guest

    So what are peoples opinions on an f8 500mm mirror lens?

    There are two on eBay at the mo. A centon one thats not too dear yet.

    Whats the difference to normal zoom lenses???

    Dean.
     
    Dean, Apr 28, 2004
    #6
  7. Dean

    Dean Guest

    For the long distance stuff there is no problem using a tripod as I will be
    shooting from various spectator points. Ie pier heads, cliff tops, sea
    walls, rocks etc.

    Theres a chance the pics will be in a magazine so I dont want the picture
    quality to let me down If i get some good shots.

    Dean.
     
    Dean, Apr 28, 2004
    #7
  8. Dean

    Rob Novak Guest

    For the reasons already stated, you're going to be fighting a lot of
    factors to get decent quality. You've got an old camera design with a
    mechanical shutter. You've got cheap glass, with a 3x teleconverter
    stuck on it, which is going to dramatically affect image quality even
    with a good lens. At f11-16 (f4-5.6 minus 3 full stops), you're going
    to need fast film and great light for good action shots (you're going
    to want to aim for shutter speeds of 1/250 or faster). A good, solid,
    non-flimsy tripod is NOT an option. Any camera shake is going to be
    magnified at max zoom.

    Long-zoom shots = challenging
    Long-zoom action shots = difficult
    Long-zoom action shots with bargain basement equipment = well, we'll
    just have to see what happens.

    Magazine quality is probably wishful thinking - be happy if you can
    tell the difference between the surfer and his board. There's a
    reason sports photogs buy those expensive fixed aperture mirror lenses
    and 200-500mm zooms. If you're successful, it'd be informative if you
    came back with some examples and explain your technique.
     
    Rob Novak, Apr 28, 2004
    #8
  9. Dean

    Rob Novak Guest

    You have an attachment to Centon?
    Fixed focal length. Fixed aperature (f-number). No zoom.

    500mm/f8 is precisely that.
     
    Rob Novak, Apr 28, 2004
    #9
  10. Dean

    RSD99 Guest

    "Rob Novak" posted:

    "...
    There's a
    reason sports photogs buy those expensive fixed aperture mirror lenses
    and 200-500mm zooms.
    ...."

    Funny ... I haven't seen *any* of those "fixed aperture mirror lenses and 200-500mm zooms"
    being used "by the pros" ... the ones I've seen being used by pro sports photogs are
    usually

    Canon EF 400 mm f/2.8L IS USM
    Canon EF 500 mm f/4.0L IS USM
    Canon EF 600 mm f.4.0L IS USM
    http://www.usa.canon.com/eflenses/


    [And occasionally the comparable Nikon models ...]

    The zoom and mirror lenses I've seen seem to be constrained to the occasional user "in the
    seats" ... not the pro in the "photo pits" or on the "photo line." The professional sports
    photographer will go out and RENT one of the premium lenses if he can't afford to buy it.

    Additionally, "Rob Novak" posted
    "... be happy if you can tell the difference between the surfer and his board. ..."

    Probably quite true.
     
    RSD99, Apr 28, 2004
    #10
  11. Dean

    Rob Novak Guest

    Well, I guess that makes ye' special or something. I never used the
    "quoted" phrase "by the pros." My experience is with the serious
    amateur/semi-pro, not the guys at SI. If you're going to refute a
    point I'm trying to make, don't put words in my mouth to do it,
    please.
     
    Rob Novak, Apr 29, 2004
    #11
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