1. Doug

    Doug

    Messages:
    820
    Name:
    Doug
    Edit My Images:
    Yes
    I was slightly disappointed with my 50mm f1.4 considering how razor sharp they should be.

    I stumbled across a guide on fine tuning the auto focus on the camera. I didn't know this was possible so thought i'd try it this evening. The results have made such a difference on the 50mm and made the 24-120 just a fraction sharper.

    I followed these guides,I hope it helps someone else get a bit more from their kit for free.

    View: https://www.youtube.com/watch?v=iWFJJ6Bo5mw&t


    Here's a quick shot of the dog after the fine tune:

    [​IMG]Suki B&W by Doug, on Flickr
     
    ancient_mariner likes this.
  2. Dangermouse1964

    Dangermouse1964 Squeaky Clean

    Messages:
    10,172
    Name:
    Pete
    Edit My Images:
    Yes
    Fine tune is brilliant for primes, not so good for zooms as it only fine tunes one focal length within the lenses range, I tried it on my 150-500 and it made it great at 150, terrible over 150 and downright awful at 500
     
    EightBitTony likes this.
  3. Box Brownie

    Box Brownie

    Messages:
    6,287
    Edit My Images:
    No
    Re: tuning a body to a zoom lens ~ AFAIK it depends on the body my Canon 5D3 can accommodate an MFA for both the wide & Tele ends of zooms. Yet to try but seriously considering FoCal see software & target to do my 100-400mm zoom......fwiw my 24-105mm seems sharp as a knife across the range!
     
    nfulcher likes this.
  4. Icee

    Icee

    Messages:
    1,964
    Name:
    Iain
    Edit My Images:
    No
    I did the AMF at the long end of my zoom and it was spot on through all the range.
     
  5. Brazo

    Brazo

    Messages:
    2,576
    Name:
    Mark
    Edit My Images:
    Yes
    It’s not just differing focal lengths it’s differing focal distances (lens to subject) that have an impact on fine tuning.

    This is why I believe the 3rd party lens offering a dock to fine tune at all variables are light years ahead of oem lenses. When Nikon start offering a dock I’ll start taking their lens offering seriously again.

    What’s the point of a sharp lens with inaccurate focus.
     
    Mr Pid likes this.
  6. Metal God

    Metal God

    Messages:
    1,012
    Name:
    David
    Edit My Images:
    No
    With FoCal software, you can do zooms, but you do calibrations at full wide and full telephoto. I did my Canon 24-70 and 24-105 lenses and the sharpness is fab.
     
  7. Dangermouse1964

    Dangermouse1964 Squeaky Clean

    Messages:
    10,172
    Name:
    Pete
    Edit My Images:
    Yes
    To be honest I have been playing around with fine tune again, just to make sure I didn't do anything wrong, and have set my 150-500 at max and it was forward focussing so I have dropped it back and it is now super sharp at 500, I do need to do more adjusting to get it constant but will have a real go at it when I have more time.
     

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