EF 35-70 3.5-4.5 giving error 99 on Eos 400D body

Discussion in 'Technical Troubleshooting' started by Marcus Rowland, Aug 20, 2021.

  1. Marcus Rowland

    Marcus Rowland Member Site Supporter

    Joined:
    Apr 23, 2017
    Messages:
    444
    Location:
    London, United Kingdom
    Equipment:
    Eos 600D, Canon 18-55mm, Yongnuo 50mm f1.8, lots of adapters for other lenses
    Nikon D7000, Nikon 18-70, Tamron XR 28-300mm, Nikon AF 50mm 1.4, Samyang 8mm f3.8, Sigma EX 50 2.8D macro, Sigma APO 170-500 5-6.3D, etc.
    Panasonic Lumix G1, 14-42 3.5-5.6, lots of adapters
    Pentax K200, Pentax 18-55mm, Pentax 50mm f1.7, Helios-KM 58mm f2
    Sony A230, Sony 18-70 3.5-5.6, Minolta 50mm f1.7
    Sony A7 (full frame e-mount), 18-55, several adapters
    Sony DSC-V1 with infrared kit.
    FLIR One thermal imaging camera for iPhone
    I picked up a job lot of lenses that included an EF 35-70 3.5-4.5, an early one with a metal mount. When I tried it on my 400D it was OK with flash but gave Error 99 and stayed stopped down as soon as I tried natural light bright enough to need stopping down. Iris won't now open.

    Is this an inherent incompatibility with these early lenses, like early Sigma for Canon, so they'll only work on 35mm bodies, or have I just been unlucky and got a faulty lens?
     
    Marcus Rowland, Aug 20, 2021
    #1

  2. Marcus Rowland

    Marcus Rowland Member Site Supporter

    Joined:
    Apr 23, 2017
    Messages:
    444
    Location:
    London, United Kingdom
    Equipment:
    Eos 600D, Canon 18-55mm, Yongnuo 50mm f1.8, lots of adapters for other lenses
    Nikon D7000, Nikon 18-70, Tamron XR 28-300mm, Nikon AF 50mm 1.4, Samyang 8mm f3.8, Sigma EX 50 2.8D macro, Sigma APO 170-500 5-6.3D, etc.
    Panasonic Lumix G1, 14-42 3.5-5.6, lots of adapters
    Pentax K200, Pentax 18-55mm, Pentax 50mm f1.7, Helios-KM 58mm f2
    Sony A230, Sony 18-70 3.5-5.6, Minolta 50mm f1.7
    Sony A7 (full frame e-mount), 18-55, several adapters
    Sony DSC-V1 with infrared kit.
    FLIR One thermal imaging camera for iPhone
    Update - seems to be working properly on a 1000F 35mm body. Tried looking this up and nobody admits to any incompatibility with any genuine Canon EF lens on a DSLR. Tried it again on the 400D and it seems to be OK, so maybe it just needed the contacts cleaning more than I originally tried. Fingers crossed!
     
    Marcus Rowland, Aug 20, 2021
    #2

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