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  1. 05-22-2006, 09:40 AM #1
    poker
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    Old Canon EF 100-300mm not working with my DSLRs

    I have the Canon EF 100-300mm f/4-5.6 USM which I purchased way back in 1992.

    I connect it to my DREBEL and my 30D and it almost never focuses. When it does focus, it is very blurry around the edges and I really wouldn't call the center sharp as well.

    Manual focus is no better.

    I haven't tried it on my old 35mm camera yet.

    Does anyone know about a problem similar to this?

    Can it be fixed?
    Last edited by poker; 05-22-2006 at 09:51 AM.
    Canon 5D MKII & Canon 7D
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