NiKKor vs Sigma Lenses

Discussion in 'Photography Beginners' Forum' started by yangmanrui, Mar 18, 2008.

  1. yangmanrui

    yangmanrui TPF Noob!

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    I have a NIKON D80 body and I need to chose one of these lenses:

    1) Sigma 17-70mm F2.8-4.5
    2) Nikkor 18-135mm F 3.5
    3) Sigma 18-125mm F 3.5

    Which one would you suggest and why? ( I need something universal for my trip - I would like to take pictures of both cities and landscapes.)




    thanks,

    Man RUi
     
  2. JerryPH

    JerryPH No longer a newbie, moving up!

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    None of the above. They are all slow and relatively low quality lenses.

    Try out a Sigma 18-50 DC EX HSM F/2.8 Macro.
     
  3. yangmanrui

    yangmanrui TPF Noob!

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    What do you mean by slow?
    Man rui
     
  4. sabbath999

    sabbath999 No longer a newbie, moving up!

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    Slow means that they don't let in very much light when their aperture is wide open.
     
  5. yangmanrui

    yangmanrui TPF Noob!

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    What would be the problems with little light?
     
  6. digital flower

    digital flower No longer a newbie, moving up!

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    I have both #1 and #2. Both are pretty good lenses. The Sigma has Macro capabilities if that is important to you and the Nikon has more zoom. If it is your only lens I would go for the Sigma (#1) out of those two. I don't know about #3.
     
  7. RKW3

    RKW3 TPF Noob!

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    If your trying to shoot in dimly lit locations and your subject is moving, you could have a lot of problems. If your lens doesn't let much light into the camera then you will have to either a) choose a slower shutter speed, which can result in motion blur if you don't have a tripod or you have a moving subject, or b) choose a high ISO setting and the higher ISO number you choose, the more light your camera will absorb, but more noise will appear (you'll probably choose a combination of a and b.)

    Here's an example of how the amount of light differs from different apertures (if you keep shutter speed & ISO the same in each photo, of course):

    [​IMG]


    So usually you just want a "faster" lens (ie. the 1.4 in the diagram is the "fastest" because it allows the most light) so you will get more oppurtunities to take blur-less and noise-less photos. Sorry if I rambled on in this post.
     
  8. Socrates

    Socrates TPF Noob!

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    I think I'm going to start prefacing every statement with "if nothing else changes..."
     
  9. yangmanrui

    yangmanrui TPF Noob!

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    Thanks for the explanation. This is excellent. Now, one more question - if I have a NiKon camera, would Nikkor lenses perform better than the same lenses from different manufacturer?
     
  10. RKW3

    RKW3 TPF Noob!

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    Umm ok. I'm not as smart as you, remember. :biggrin:
     
  11. Socrates

    Socrates TPF Noob!

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    Let me put it to you this way...
    I bought Nikon bodies because I wanted to use Nikon lenses.
     
  12. JerryPH

    JerryPH No longer a newbie, moving up!

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    Depends on the lens. In general, yes... but NOT in the case of that 18-50 that I mentioned. It has been tested by 3 or more photography magazines and won EVERY time in tests against the best from Nikkor and Tamron.

    This is why it is important that that YOU do the homework and research to find out what are the best choices based on your needs. ;)
     

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