Canon 100mm L lens with UV filter

Discussion in 'Canon Lenses' started by davholla, Jun 26, 2020.

  1. davholla

    davholla No longer a newbie, moving up!

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    Would having the UV filter affect autofocus to a noticeable amount? It is a long story.


     
  2. Davidjk

    Davidjk TPF Noob!

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    I wouldn't have thought so, it maybe worth speaking to Canon directly on their free live chat service.


    ive used it loads since the shops closed for lockdown
     
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  3. compur

    compur Been spending a lot of time on here!

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    Why would you want to put a useless "UV filter" on such a nice lens?
     
  4. davholla

    davholla No longer a newbie, moving up!

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    I didn't want to, I had a free Canon test drive and took loads of photos with it vs my Canon 60mm. I was really trying to compare the AF - and after I went to package it up, I realized that I had had a filter on it!!!!
     
  5. Original katomi

    Original katomi TPF Supporters Supporting Member

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    Use a filter on any lens, you will get some loss of IQ with any filter, regardless of quality
    It’s up to you to weigh up the advantages against the loss of IQ
    For me a filter on l glass is worth the loss of IQ as I have some problems with my hands and from time to time touch the front of the lens so If I touch a filter and leave a acidic finger print that will damage the surface that is cheaper than new l glass
     
  6. Dacaur

    Dacaur TPF Noob!

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    I think most people worry more than necessary. I've seen more stories of filters causing damage to lenses than actually saving them. Like one where a lens was lightly dropped with a filter and lense cap, and the shattered filter scared the front element. Another where a filter damaged the lens threads.

    On the other hand, scratches and fingerprints actually have minimal impact on your pictures.
    This is worth a read to see actual impact from a "scratch".. Front Element Scratches
     
  7. Dacaur

    Dacaur TPF Noob!

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    As for affecting auto focus, in most situations a uv filter of any quality will have no impact on autofocus. In a few specific situations, like shooting bright lights at night or pictures with the sun in the frame a uv filter can cause extra flare spots, which could in theory negatively affect autofocus speed and accuracy.
     

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