M6 Mkii Hdmi Out false overexposed output

Discussion in 'Technical Troubleshooting' started by JJ Canon, Oct 28, 2022.

Tags:
  1. JJ Canon

    JJ Canon New Member

    Joined:
    Oct 28, 2022
    Messages:
    2
    Equipment:
    EOS M6 MKii
    I have Canon M6 Mkii that I use on stationary tripod connected to field camera. I also take picture from computer using the usb connected to the camera using eos utility remote shooting function.

    I use the field camera to check exposure of the picture using false color, but the hdmi output is different than the actual picture taken. It become overexposed. e.g : when I take picture of white clothes in white background, in the live shooting preview, I can see all the finer details, but in the hdmi output, the clothes sleeve are gone and already blend in with the background (overexposed).

    So without using hdmi out, the preview shown on the back of the camera and the preview shown in eos utility app show the correct amount of exposure, the same as if I take the picture.

    I tried to find the setting, thinking there's a way to fix it, but can't find it. I also thought it was the field monitor problem, so I connect it to my pc monitor, but whatever I do, the picture shown from the camera hdmi out is always "brighter" than the preview on live preview / the back of the camera.

    I can't find any thread or question from google regarding this problem as well. If anyone have experienced this problem as well, and might have a solution, any input is appreciated. Thank you.
     

  2. johnsey

    johnsey Site Moderator Staff Member Site Supporter

    Joined:
    Apr 21, 2017
    Messages:
    2,246
    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
    Have not used one of these monitors, but you can test HDMI to a tv and see if the output is close to what you see on the camera back. The false color as i understand works like a zebra in a video camera, the settings may be able to be tweaked but i expect it to start showing solid color band about the time your going to loose detail. How close is the image to having little detail in the highlights or shadows? In any event maybe there is an option to calibrate the external monitor?
     
  3. johnsey

    johnsey Site Moderator Staff Member Site Supporter

    Joined:
    Apr 21, 2017
    Messages:
    2,246
    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
    I guess i would think it would be faster to expose, and check histogram to see if your clipping highlights or to dark on the shadows. And adjust compensation if needed.
     
  4. JJ Canon

    JJ Canon New Member

    Joined:
    Oct 28, 2022
    Messages:
    2
    Equipment:
    EOS M6 MKii
    hi, thanks for the reply.

    I've test hdmi to tv and the output is the same with the field monitor, it's over expose.

    for your second suggestion, I can't use histogram for this case since I want the background to be pure white, and the clothes is white as well, so naturally there will be some merging between the highest rightmost area of histogram and transitioned to the clothes.

    that's why I use false color on the monitor, it's simple to check if an area inside the clothes becomes red (100% over expose), where I only want the red area to be the background only. The problem is, since the hdmi output is a bit overexposed, the false color shows some area of the clothes to be already fully red, while in reality it's still have finer details, thus making the false color not helpful to determine the correct exposure for the clothes.
     

Share This Page