New Canon firmware for 5DmkII fixes aperture glitch

Although a lot of people reported the aperture glitch where the iris closed/ opened when focusing on some lenses in firmware version 2.0.4 it was confusing as to whether Canon recognised this bug and were going to fix it. Well they have with new firmware version 2.0.7. I love that they called it a phenomenon! Maybe they called on Jennifer Love Hewitt to fix it?Which you can download here.

This from Canon:

Firmware changes

This firmware update (Version 2.0.7) incorporates the following improvements and fixes.

  1. Fixes a phenomenon in which the aperture exhibits abnormal movement when shooting movies in manual exposure mode and Aperture Priority AE (Av mode) using some Canon lenses (such as macro lenses).
  2. Fixes a phenomenon in which the exposure level shown in the LCD panel differs from what is shown in the viewfinder when shooting still images in manual exposure mode.
  3. Fixes a phenomenon in which the Wireless File Transmitter (WFT-E4 or WFT-E4 II) may not automatically power off when used for FTP transfers.

These phenomenon only occur with the Version 2.0.4 and Version 2.0.3 firmware.

The Version 2.0.7 firmware being released this time is for cameras with firmware up to Version 2.0.4. If the camera’s firmware is already Version 2.0.7, it is not necessary to update the firmware.


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  1. I was sceptical about clicking on the link, but I thought its not April fools day! -:) I haven’t experienced any of these phenomenons may be because I don’t (yet) have a macro lens

  2. A bit of a tangent but re the 7D have you any intel on turning off AE lock? …coz according to Canon’s Digital Learning Centre

    “Exposure Control during automatic video shooting: One issue video shooters encounter with auto exposure is that if the camera is panned to follow a subject, or if it moves from a light-colored subject to a darker one (or vice-versa), the overall exposure in the scene often changes. With the EOS 7D, this is easy to prevent, using the AE Lock feature. The rear button with the asterisk icon can be pressed either before or during shooting, and exposure locked in-place at that moment. An asterisk appears in the information strip below the scene on the LCD monitor, reminding you that exposure is indeed locked. To unlock it, don’t press the AE Lock button again. Press the AF point select button immediately to the right, and the asterisk icon will disappear.”

    With my 7D this doesn’t not work and pressing the AF button ust magnifies the image on screen. Does this really work for anyone?

  3. Why do they jump from 2.0.4 to 2.0.7? That sounds like other things could have been fixed too, but then the changelog is quite compact. On the other hand, it’s nice to see Canon still working on the cam.

  4. Any idea if I can upgrade firmware from version 1.1.0 to 2.0.7..?. I was a bit worried when I heard of the iris twitch problems and have held off so far.

  5. Hi Philip,
    Just a question on your in camera settings, does the choice of colour space effect the latitude of your footage for grading in COLOR 1.5..?
    My head is still in stills photography so somethings are still unclear.


  6. Canon REALLY needs to come out with a firmware update for the 7D & 550d that removes the automatic gain control. If it can be done on the 5D then i’m pretty sure they can do it for those two cameras as well…

  7. And what about 7D users? I just did a video with my 7D and 100 mm 2,8 macro (not the L series) and I got the exact same problem. Couldn’t do any focus pull shots as they were ruined with the iris changing.

    Please Canon, don’t forget the 7D!

    Anyone else that can try this on their 7D? Just so that I know that I’m not the only one. Go to video mode and set everything to manual. Start turning the focus ring and you can both see it by looking down in the lens and on the screen, and you can even hear it as it for a brief moment changes the iris slightly.

  8. Hi Phil,

    here is a 1st hand experience with the new 5D firmware: phenomenally useless for my Tamron 28-75mm 2.8 XR Di, which is otherwise quite a good lens for the price.
    I could make recording after a few initial error messages (“clean the contacts of the lens, the camera is unable to communicate with the lens”) but the horrible scratching noise remain and I feel the lens doing some “mechanical struggle” inside that surely is not healthy for long life.

    So this FW update is nothing more so far than a phenomenal piece of cr@p.
    Perhaps the problem is solved with those Canon lenses, but hey, there are other lenses out there suffering.

  9. The FW update fixed my 100mm when connected to the 5DMKII, but not the T2i. It still jitters on the T2i.
    I emailed Canon, here’s their response, “Since there is no firmware update for the T2i right now I would have to recommend service.”
    For some reason they want me to send the camera in for service, not the lens.
    I’m at a loss.

  10. And why not adding 50/60 fps with the new firmware. Is it that impossible Canon? Can’t wait anymore. Do something Phil…talk to the guys who knows the guys please.

  11. I’m not getting any serious issues with 2.0.7, all my L glass works ok, My Tamron 90mm SP Di f2.8 is ok on fixed iso, but exhibits a weird exposure jump when altering focus while on auto iso, it will visibly jump quite a bit darker then lighter on the screen as the focus is changed, but I don’t believe it’s the iris fluttering or jumping, I think it is the iso jumping about as a sort of spike is sent when the focus ring is turned.

    Weird! But not the end of the world as on full manual and fixed iso most of the time.

  12. Hi, I have the same problem with my 7D and this happens with my canon 20mm f/2,8, need to fix this, somebody know if canon has a new firmware to fix the aperture glitch on the 7D…

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