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Thread: EF 100mm F 2.8 USM mistake ??!!

  1. #1

    Lightbulb EF 100mm F 2.8 USM mistake ??!!

    I got this off photo.net:

    "IŽve played with the USM version in a shop recently, plus IŽve looked at printed pictures of the USM version. In my opinion Canon has made a big mistake in the optical construction (or a bad compromise) - under certain circumstances there is a terrible or weird background blur (double line bokeh), eg. if you photograph a flower, the unsharp part of the flowerŽs stem may turn into a structure which looks like two stems. Disgusting. IŽd go for the older version.
    -- Tobias Mennle , August 17, 2003; 11:07 A.M. Eastern "

    I know 100mm f2.8 is a really sharp lense but can anyone can testify to the above comment by that guy ?

  2. #2

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    Hi,

    I have experienced the same phenomenon. Usually happens when you f/2.8 (I usually do f/2.8).

    If you want, I can show you some slides with this problem.

    The lens is best at f/8 to f/22.

    Cheers!

  3. #3

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    Quote Originally Posted by myloplex
    I got this off photo.net:

    "IŽve played with the USM version in a shop recently, plus IŽve looked at printed pictures of the USM version. In my opinion Canon has made a big mistake in the optical construction (or a bad compromise) - under certain circumstances there is a terrible or weird background blur (double line bokeh), eg. if you photograph a flower, the unsharp part of the flowerŽs stem may turn into a structure which looks like two stems. Disgusting. IŽd go for the older version.
    -- Tobias Mennle , August 17, 2003; 11:07 A.M. Eastern "

    I know 100mm f2.8 is a really sharp lense but can anyone can testify to the above comment by that guy ?


    Look here:
    http://forums.clubsnap.org/showthread.php?t=44855
    http://forums.clubsnap.org/showthread.php?t=42309

    various people tell you 180 f/3.5L better, why waste time with an ordinary non-L lens?

  4. #4

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    Quote Originally Posted by erwinx
    Look here:
    http://forums.clubsnap.org/showthread.php?t=44855
    http://forums.clubsnap.org/showthread.php?t=42309

    various people tell you 180 f/3.5L better, why waste time with an ordinary non-L lens?
    I beg to differ. L lens does not mean it is better.

  5. #5

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    Quote Originally Posted by VincentLin
    Hi,

    I have experienced the same phenomenon. Usually happens when you f/2.8 (I usually do f/2.8).

    If you want, I can show you some slides with this problem.

    The lens is best at f/8 to f/22.

    Cheers!
    can see the pictures please : )

  6. #6

    Default

    Quote Originally Posted by erwinx
    Look here:
    http://forums.clubsnap.org/showthread.php?t=44855
    http://forums.clubsnap.org/showthread.php?t=42309

    various people tell you 180 f/3.5L better, why waste time with an ordinary non-L lens?

    brother I don't print money. Also at 180mm I read its hard to use handheld and usually a tripod is recommended..... 50mm too close ..100 mm is better

  7. #7

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    Nothing wrong with 100mm macro USM, here's two sample wide open at f/2.8:





    Can't afford 180 L? Get the Sigma 180mm APO EX macro instead.

  8. #8

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    Quote Originally Posted by myloplex
    can see the pictures please : )
    I dun have a film scanner leh. If you wanna drop by my workplace, I can show you.

  9. #9

    Default

    Quote Originally Posted by erwinx
    various people tell you 180 f/3.5L better, why waste time with an ordinary non-L lens?
    for Macro lens, L, Non-L or 3rd party doesnt matter, they are all built with optimum optical quality.

  10. #10

    Default

    get the Nikon AFD 105 micro then...
    DR KOH KHO KING

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