Sigma 20mm f1.8 lens - conflicting reviews - is it any good for my 10D? - HELP

Discussion in 'Digital Photography' started by Mark N, Aug 25, 2003.

  1. Mark N

    Mark N Guest

    Hi, i was about to order a Sigma 20mm f1.8 EX lens for my Canon 10D camera
    after reading excellent user reviews on photography review,EX,DG,ASPHERICAL,RF/PRD_85099_3111crx.aspx

    I have just looked at


    and could not believe it when it rated it as 1.91 (poor) out of 5.

    How can 24 reviews on photography review be so positive about this lenses
    sharpness etc, and photozone be so negative???

    Is this a good sharp lens or not? i realise that this lens will not be sharp
    at f1.8, but upwards from about f4 it should be shouldn't it???

    Regards, Mark
    Mark N, Aug 25, 2003
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  2. Mark N

    Don Coon Guest

    Don Coon, Aug 26, 2003
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  3. Mark N

    gsum Guest

    I use this lens with my D100. Optically I find that it
    is very good at f5.6 - f11-ish, f1.8 is very useful,
    giving acceptable results and the lens will focus to
    a few cm. Also, there is little flare. There are a few
    problems though:
    1. The lens doesn't feel very robust.
    2. It is very easy to slip the focus ring into manual
    with the camera set to auto (this causes the ring to
    3. Compared to the Nikon 20mm f2.8 it is very large.
    4. The filter size is 82mm (if I remember correctly) -
    quite expensive.
    Overall, I think that this lens is very good for the money
    but I really see it as a stopgap until I can afford the
    Nikon 12x24mm.

    gsum, Aug 26, 2003
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