Back button focus issue

Discussion in 'Technical Troubleshooting' started by Ton Vogels, Jun 17, 2022.

  1. Ton Vogels

    Ton Vogels New Member

    Joined:
    Jun 17, 2022
    Messages:
    1
    Location:
    Eindhoven The Netherlands
    Equipment:
    Eos 90D
    100mm macro
    100-400
    Hi.
    I just started to check whether back button focus is better for my wildlife photography.
    Tested it and most of the time I like it.
    I have an issue though.
    Sometimes when I am completely out of focus the back button focus won’t react until I manually turned the focus ring to be in focus the back button will focus as expected.

    has anyone experienced this and found a solution?
    I tested it with a Canon lens and a Tamron lens, both reacted the same.
     
    Ton Vogels, Jun 17, 2022
    #1

  2. Craig Sherriff

    Craig Sherriff Well-Known Member Site Supporter

    Joined:
    Apr 25, 2017
    Messages:
    3,339
    Location:
    Tasmania, Australia
    Equipment:
    60D,350D 1dmark3, T70, AV1, lenses ranging from 28mm to 600 mm, canonet Junior, Canonet QL 25, Mamiya C3 and 3 lens sets,Mamiya 645 pro TL and 3 lenses.Mamiya universal press camera and 4 lenses, Mamiya RB67 Pro S and 5 lenses, Pentax MG and various lenses, Toyoview 4 * 5 inch large format camera,Calimat C1 8*10 inch ultra large format camera.
    Welcome to the forum Ton, I have a 60D and it occasionally happens to me, I have older gear and consider it a bit of a quirk that happens. I just put up with it.
     
    Craig Sherriff, Jun 17, 2022
    #2

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