Canon 90D with Sigma 24-70 over exposing shots

Discussion in 'Technical Troubleshooting' started by Tootall, Jul 30, 2021.

  1. Tootall

    Tootall New Member

    Joined:
    Dec 27, 2018
    Messages:
    6
    Equipment:
    7d mk2
    100-400 mk 2
    10-18 mm
    18-135 mm
    Sigma 105 mm macro
    Good morning
    I have a 90d and when I use it with the Sigma f2.8 24-70 lens it seems to be prone to the shots being over exposed. Does not happen when attached to my 7d mk2 .I have to adjust setting a lot to get summat decent.Is there a firmware update that would correct this as I,ve been lead to believe? Many thanks.
     
    Tootall, Jul 30, 2021
    #1
    Tonytee likes this.

  2. johnsey

    johnsey Site Moderator Staff Member Site Supporter

    Joined:
    Apr 21, 2017
    Messages:
    2,133
    Location:
    Fargo, ND
    Equipment:
    5dMk4, 5dsR, 5dMk2, 20D, 70-200 2.8L IS, 100mm 2.8 Macro USM, 50mm 1.4, 85mm 1.8, 17-40mm 4.0L, TS-E 24mm 3.5L II, Rokinon 14mm 2.8; Pixma Pro-100
    Just that lens on the 90d? Seems very odd. can you post a non adjusted settings example? AKA reset everything back to normal.
     
    johnsey, Jul 30, 2021
    #2
  3. Tonytee

    Tonytee Well-Known Member Site Supporter

    Joined:
    Apr 19, 2017
    Messages:
    2,886
    Equipment:
    Canon EOS Rebel T5 with Canon EF-S 18~55mm kit lens and Canon EF-S 55-250 mm 1:4~5.6 IS II
    Telephoto Lens.
    Hello Tootall, I had a similar issue with a Canon EOS Rebel t5 (great little workhorse) and a Sigma 70~300mm AF APO DG lens. At first
    outing the images turned out beautifully and then suddenly everything went South. Images would turn out overexposed and became even more overexposed the more I stopped down the lens and seriously overexposed when the lens was stopped down all the way. I took the lens in for examination and they reported that back then it was typical of Sigma to produce products that were inconsistent in their performance. At that point I offered the lens to the shop for parts and they refused my offer. I know that today's Sigma lenses are stellar performers however, they do come with stellar prices. As for me, I never purchased another third party anything and will stick with Canon OEM. The only other alternative would be to perhaps consider Tamron as they do offer and abide by their five year warranty as opposed to a one year. Hope this helps and thanks for reading. :)

    Tony
     
    Tonytee, Aug 1, 2021
    #3
  4. GDN

    GDN Well-Known Member

    Joined:
    Jul 22, 2018
    Messages:
    2,168
    Location:
    South Island, NZ
    Equipment:
    A little Canon stuff
    Just a couple of thoughts.

    Have you tried cleaning the lens contacts on both the camera body and the lens? Also, what is the firmware version that is installed on your camera? With a very quick look around on the net, and the newest version looks as if it is V1.1.1. If you are not using the newest version, I would look at doing the update.

    Gary
     
    GDN, Aug 1, 2021
    #4
  5. Tootall

    Tootall New Member

    Joined:
    Dec 27, 2018
    Messages:
    6
    Equipment:
    7d mk2
    100-400 mk 2
    10-18 mm
    18-135 mm
    Sigma 105 mm macro
    johnset Tonytee Gdn.
    Good morning folks and thankyou for your replies.Think I've sorted things.Have just tried an 18-135 kit lens on the 90D.Fired off a few shots and none have shown as over exposed without altering any camera settings.Leads me to believe it may be a possible firmware issue with the 24-70.

    Going out to do some more shots to further test/confirm
    Camera firmware is 1.1.1.
    Waiting on a Sigma usb dock to update the 24-70..
    Thankyou again
     
    Tootall, Aug 1, 2021
    #5

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