which macro lens

Discussion in 'Photography Forums' started by ftmftm, Nov 2, 2005.

  1. ftmftm

    ftmftm
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    hi all, im thinking about getting a new macro lens and ive narrowed it down to a few, i will be using a nikon d50 body, any advice would be welcome, thanks


    Sigma: 105mm F2.8 EX "DG" AF
    Sigma 150mm f/2.8 EX APO HSM Macro Lens
    Tamron: SP 90mm F2.8 DI 1:1 AF Macro Autofor
     
  2. kenlynch

    kenlynch
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    Hi there.

    Not got any of those lenses, but I would probably go for the Sigma 105mm because it has a smallest aperture of f45 as opposed to f22. This will give you a much greater depth of field. The closest focusing distance of both lenses is about 38cm, but with the 105mm at f45 you will have a depth of field of about 1.72cm compared to 0.35cm with the 150mm at f22.

    The larger depth of field will make things hell of a lot easier when using the lens for macro work. The f2.8 is really there to aid focusing, if you tried shooting macro with f2.8 you will have a depth of field of only 0.1cm - which means most of your subject will be out of focus.

    Obviously, you will also need to use longer exposures (which is not a problem if your subject is fixed) or get more light to your subject so think about investing in a flash or tripod or both.
     

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