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Thread: 50mm af-s f1.4G vs 50mm af-s f1.8G vs af-s 85mm f1.8G

  1. #61
    Senior Member rain5533's Avatar
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    Quote Originally Posted by daredevil123

    Most wide aperture lenses show fringing when wide open.

    The 85/1.4, the 50/1.4 and even the new 28/1.8
    The only I was found for 50mm f1.8G has lesses CA. Even wide open and point to white object..
    That is much improved.

  2. #62
    Moderator daredevil123's Avatar
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    Default Re: 50mm af-s f1.4G vs 50mm af-s f1.8G vs af-s 85mm f1.8G

    Quote Originally Posted by rain5533 View Post
    The only I was found for 50mm f1.8G has lesses CA. Even wide open and point to white object..
    That is much improved.
    The 50/1.8G has less CA than 50/1.4G because the aspherical element and the smaller max aperture. But the CA is still there just less than the 50/1.4.

    But the wider a lens is the harder it is to control CAs, that is why you see the 28/1.8 has a fair amount of it.
    Last edited by daredevil123; 15th August 2012 at 02:23 PM.

  3. #63

    Default Re: 50mm af-s f1.4G vs 50mm af-s f1.8G vs af-s 85mm f1.8G

    CA, much like geometric distortion can be corrected pretty decently in post production these days, with minimal user effort. Those are some of the last things I consider when selecting lenses. Think about other things such as sharpness, bokeh quality, microcontrast, tendency to flare etc. which can't be fixed tot he same extent in post.

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