can’t focus with lens adapter

Discussion in 'Technical Troubleshooting' started by wintery, Dec 6, 2021.

  1. wintery

    wintery New Member

    Joined:
    Dec 6, 2021
    Messages:
    3
    Equipment:
    5D Mark ii
    I have an old Canon 50mm 1.8 lens with m39 threads I have been wanting to use on my 5d mk ii. I got an m39 to eos adapter and all seems to fit well on the 5d except I can not focus the lens. Focus on the lens ring from 1m to infinity are just a blur. I use other manual focus lenses with out a problem so surprised at this failure. Any help is appreciated.
     

  2. porkphoto

    porkphoto Active Member Site Supporter

    Joined:
    May 9, 2017
    Messages:
    708
    Location:
    Southern California, USA
    Equipment:
    Cameras 1DmkIII, 1DSmkII, 50d, 7d, 6d, 70d, 5Ds ,90D
    Lens 17-40 f4L, 24-70 f4L IS, 100 f2.8L IS macro, 200 f2.8L, 300 f4L IS, 300 f2.8L, 100-400 f4.5-5.6L IS
    Hmmm...m39 mount lens are rangefinder lenses and will not be able to focus on dslr's. It will work on eos-m bodies. That's my best guess.
     
  3. Craig Sherriff

    Craig Sherriff Well-Known Member Site Supporter

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    Apr 25, 2017
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    Location:
    Tasmania, Australia
    Equipment:
    60D, 10D, 50D 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. 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, Wintery, does your adapter have a piece of glass in it to allow for infinity focus, if not it may be like a FD mount to EOS mount I purchased, I had one with the glass and my FD lenses worked fine but I purchased a second one with out the glass and it was useless, this may be the case with your adapter.
     
  4. John L

    John L Active Member

    Joined:
    Jul 10, 2019
    Messages:
    120
    The adapter throws the lens forward from the position it would normally be in when attached direct to a camera. Unless the adapter has a correcting lens in it, this inevitably means that only close focus is possible.

    I assume the other manual lenses you refer to as working successfully are mounted to the camera without an adapter?
     
  5. wintery

    wintery New Member

    Joined:
    Dec 6, 2021
    Messages:
    3
    Equipment:
    5D Mark ii
     
  6. wintery

    wintery New Member

    Joined:
    Dec 6, 2021
    Messages:
    3
    Equipment:
    5D Mark ii
    Thank you all for helping me clear up this question. As well, the replies have me checking over my adapter use in general and I see I have been compensating during manual focus with all of my ‘adapted’ lenses. Now I will skip the $9.95 fixes and look deeper into getting quality tools so I can enjoy my photography more.
    I appreciate the time and knowledge you were willing to share to help straighten me out.
     

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