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Thread: Larger zoom lenses and filters

  1. #1
    Junior Member
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    Larger zoom lenses and filters

    I have a 150-600 zoom and noticed that when I screw a filter on the front, the picture is a little blurry at higher zooms. Is this a characteristic of the larger zooms or do I just have a cheap filter. It did come with the lens. Itís a vivitar multi-coated CPL filter. The lens is a Sigma sports lens.

  2. #2
    Super Moderator Kayaker72's Avatar
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    If photos taken with the screw in filter are noticeably less sharp than without the filter, it is a cheap filter. I own the 150-600S, but is the one lens I own where I havenít added a filter. I just figure the lens hood is massive and sufficient protection.

  3. #3
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    I had a cheap CPL on a kit lens back when I started and it totally destroyed the image quality. My bet is poor filter quality - try just holding it in front of another lens and shoot through it and see if it crashed the IQ
    If you see me with a wrench, call 911

  4. #4
    Senior Member neuroanatomist's Avatar
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    Quote Originally Posted by canders2 View Post
    It’s a vivitar multi-coated CPL filter.
    Vivitar...not the first name that comes to mind when I think of quality filters. Nor the second. Actually, it doesn't even make the list. I'd say it's the filter.

  5. #5
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    Well, I had a vivitar lens (400mm) for my Canon A-1, decades ago. Don't think a bad filter would make any difference in the image quality with that lens .

    Lars

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