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  1. #1
    Join Date
    Dec 2007
    Posts
    2,562

    How can I test my lens??

    Hope this don't sound like a stupid question but, How can I test my 3 lens? If I take a picture with all 3 of the same thing and the settings can I compare the 3 pictures. If so what is the best thing to take a picture of? Should I use a flash or go outside in the sun? I just want to see which is my best lens? I know I don't have any high end lens but i would like to know what would give me the best picture.
    Thanks
    Frank
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  2. #2
    Join Date
    Dec 2006
    Location
    So Calif
    Posts
    3,226
    Shoot in daylight of something with color and details.
    Shoot at maximum aperture (such as f4) f5.6 and f11 with each lens to see the difference there. Most lenses are best a couple stops down from maximum, and some will be better than others.
    Pentax K20D/K5/15/21/40/70/10-17/12-24, Sigma 17-70 2.8-4.5/150-500, Tamron 90 Macro/70-200 2.8, Canon SX20 IS/Elph 500HS
    (formerly Pentax 50 1.4/50-200/55-300/K100D, Sigma 18-50 2.8/70-300 APO, Tamron 28-75, Viv 800, Tele-Tokina 800, Canon S3 IS, Samsung L210)
    http://s133.photobucket.com/albums/q78/KylePix/

  3. #3
    Join Date
    Dec 2007
    Posts
    1,759
    i use these formica samples..
    Last edited by SONYNUT; 01-11-2010 at 06:54 PM.

  4. #4
    Join Date
    Nov 2004
    Location
    Idaho!
    Posts
    175
    It will be hard to come up with what is "your best lens" doing some simple shot comparisons of a stagnant object. One of your lenses may perform better at a certain focal length and then another one has a well defined sweet spot from an aperture perspective and so forth and so on. Each lens may perform better in their own varied and unique situations.

    Just taking a stagnant shot at 30mm, f8.0, ISO 100 with each lens and then comparing the results I don't think will tell you very much as to which one is the best all around performer.

    To me the best lens in my bag is the one I use the most.
    Jared

  5. #5
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,554
    While overall performance is a grand thing, indeed, as "bauerman" correctly points out, each lens will have its strengths. The only way you can determine "the best" lens is compare similar lenses, not lenses of different classes.

    If you had, a SIGMA 70-300, a TAMRON 70-300mm and a SONY 70-300 to compare, then you could make this distinction.

    Similarly, if you had a SIGMA 18-50 f/2.8, a TAMRON 17-50 f/2.8 and a SONY CZ 16-80mm f/3.5-4.5 ... once again, same class ... focus on something shoot away, changing the lenses after a "round-robin" at each setting.

    Finding a common setting though, I had done with the SIGMA 10-20mm f/4.-5.6, TAMRON 17-50mm f/2.8 and the Tokina 20-35mm f/3.5-4.5 produced some really strange results. At a common 20mm, the TAMRON frankly shot the best, as I would have expected it to. But, then again, it cannot provide a 10mm shot, like the SIGMA UWA can.

    The Tokina 20-35mm is a 35mm-film lens, and on a digital sensor ... it's kind of lame image-quality, but way cheap! You can get one for around $100, which is a far cry from the $400 TAMRON. You definitely pay for what you get.

    I'm not really sure what you are trying to photography, Frank ... but if you can just set up some text (various font sizes) ... at about 5 feet away ... light it well and photograph it, you should be able to vary the focal length and reasonably determine sharpness and accuity.
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

  6. #6
    Join Date
    Dec 2007
    Posts
    1,759

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