A&P Can I not use a regular zoom lens for macro shots?

Discussion in 'Lifestyle' started by sea bass, Dec 18, 2007.

  1. sea bass

    sea bass Guest

    I try to use a sigma 18-50 at f2.8 to take macro shots but they always come out slightly out of focus. It looks somewhat noisy too, but iso is low at around 320.

    Do I need a specific macro lens to do macro shots? What specifically does a 50mm macro lens do that my 50mm lens doesn't?

    Also do those extenders work? I don't take enough macro shots to buy a new lens really.
     
  2. Bloody Sunday

    Bloody Sunday OT Supporter

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    try flipping a 50mm around. you can take some interesting macros with it
     
  3. mobbarley

    mobbarley Active Member

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    crappy idea, only do this if you are bored.
     
  4. mobbarley

    mobbarley Active Member

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    Macro lenses can focus on objects much closer than regular lenses can.

    The best you can do with your lens by itself is set it at 50, turn the focusing ring to the closest setting, then zoom in/out with your head camera until the image is at its sharpest (should be ~2feet).

    you can add an extension tube to get closer and more magnification as a result. they work well with most lenses in the ~50mm region. It wont be as good as a macro lens for sharpness, but they do a pretty damn good job. You will also have to take it off to use the lens normally.
     
  5. e.pie

    e.pie Active Member

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    :roflw:
     
  6. GregFarz78

    GregFarz78 New Member

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    Did you try manual focus? The 18-50 isnt a true macro lens, my 17-70 is listed as macro but same thing its not a true 1:1 macro lens it does a decent job though but it hunts to focus if you get really close to an object I just use manual focus and it works fine
     
  7. Bloody Sunday

    Bloody Sunday OT Supporter

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  8. Cobber

    Cobber Wanna touch my bunny hole?

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    extension tubes will work well ... you can get the on the cheap on ebay ... last time I looked a set of 3 was about $10
     
  9. mobbarley

    mobbarley Active Member

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    so? have you ever tried it? it like taking a photo with a damn pin hole camera then you have to crop the shit out of every shot. not to mention that if you dont have a fifty lying around its cheaper to buy the tubes.
     
  10. Bloody Sunday

    Bloody Sunday OT Supporter

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    yeah, of course i've tried it.
     
  11. Fucker

    Fucker out of the fast lane, bitches

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    if you're really into macro, buy a dedicated macro lens or a zoom with a "macro" switch
     
  12. brasheye

    brasheye Rotary Crew

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    Kenko Auto tubes nga :eek5:
     
  13. mobbarley

    mobbarley Active Member

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    they make automatic ones now? I got ripped :wtc:
     
  14. brasheye

    brasheye Rotary Crew

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    $130 at Paxtons George Street.
     
  15. turbodude

    turbodude Just a photographer OT Supporter

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    be careful i have heard of really cheap ext tubes cracking sending the lens dropping to the floor.
     
  16. GregFarz78

    GregFarz78 New Member

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    those cheap ones are worthless you lose AF and can't control aperture of the lens
     
  17. Cobber

    Cobber Wanna touch my bunny hole?

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    they do put a focus ring on the lens ... as well as an aperture ring :ugh:
     
  18. GregFarz78

    GregFarz78 New Member

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    you can manual focus true thats not a big deal but when I was looking to pick up a cheap set of those extension tubes I read somewhere you lose the ability to control aperture its always wide open...what canon EF lenses have a manual aperture ring?
     

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