topic Re: EOS 5D Mark III Images too dark in Tv and Av but OK in M in EOS DSLR & Mirrorless Cameras

EOS 5D Mark III Images too dark in Tv and Av but OK in M

Chrisc99 — Wed, 18 Mar 2026 12:40:29 GMT

Hi, I shoot with a Canon 5D mkiii in manual and the lighting is fine, recently I tried to shoot in TV and AV but the images kept coming out dark even when I upped the ISO.

Does anyone have an idea of what could be wrong ?

Thanks Chris

Re: Light issues with my 5D mkiii

deebatman316 — Tue, 17 Mar 2026 22:21:55 GMT

Hi @Chrisc99 what settings are you using in Av & Tv Modes? What lens are you using please provide the full name. It sounds like your aperture is too small or your shutter speed is too fast. This will cause underexposed pictures.

Re: Light issues with my 5D mkiii

rs-eos — Wed, 18 Mar 2026 02:02:42 GMT

Do you have example images with metadata that you can share? From what you're saying, it sounds like if you take a particular image in M, but then choose either Tv or Av, the camera is not choosing an equivalent exposure?

Re: EOS 5D Mark III Images too dark in Tv and Av but OK in M

shadowsports — Wed, 18 Mar 2026 13:50:21 GMT

@Chrisc99

To post RAW examples for us. You will need to use a file sharing service like Google drive, OneDrive, Dropbox, etc. Please upload your pictures there and provide us with the link.

Thanks 🙂

Re: EOS 5D Mark III Images too dark in Tv and Av but OK in M

atam1 — Wed, 18 Mar 2026 21:53:52 GMT

Can you please elaborate more about the "dark" issue? Does the image come out underexposed, or there is no image at all?

Re: Light issues with my 5D mkiii

Chrisc99 — Thu, 19 Mar 2026 19:02:24 GMT

Hi i was using a Canon EF 16-35mm, f1.28 wide angle lens

Re: Light issues with my 5D mkiii

Chrisc99 — Thu, 19 Mar 2026 19:09:30 GMT

Hi Ricky,

Unfortunately i was shooting a wrestling show in a hotel conference room so i changed back to manual. I have however taken 3 shots today in RAW one in manual, one in AV and one in TV. They are in a google folder https://drive.google.com/drive/folders/11slB6Wl1JaVHVeEqn7gDYF_3kYACOEoF?usp=drive_link

Thanks Chris

Re: Light issues with my 5D mkiii

deebatman316 — Thu, 19 Mar 2026 19:10:17 GMT

@Chrisc99 First Canon never made a “EF 16-35mm, f1.28” lens. Canon has made multiple 16-35mm lenses though. So which one is it so we can give you the correct information. We need to the exact name listed on the lens.

EF 16-35mm F/2.8L USM
EF 16-35mm F/2.8L II USM
EF 16-35mm F/2.8L III USM
EF 16-35mm F/4L IS USM

Re: EOS 5D Mark III Images too dark in Tv and Av but OK in M

Chrisc99 — Thu, 19 Mar 2026 19:13:35 GMT

Hi, Yeah The images where underexposed i even ramped up the iso.

The images i took tonight using the same 3 setting are in a google drive https://drive.google.com/drive/folders/11slB6Wl1JaVHVeEqn7gDYF_3kYACOEoF?usp=drive_link

Thanks

Chris

Re: EOS 5D Mark III Images too dark in Tv and Av but OK in M

Chrisc99 — Thu, 19 Mar 2026 19:14:24 GMT

Hi Rick the images are in this folder https://drive.google.com/drive/folders/11slB6Wl1JaVHVeEqn7gDYF_3kYACOEoF?usp=drive_link

Thanks

Chris

Re: Light issues with my 5D mkiii

Chrisc99 — Thu, 19 Mar 2026 19:16:33 GMT

Apologies

EF 16-35mm F/2.8L USM

Re: Light issues with my 5D mkiii

deebatman316 — Thu, 19 Mar 2026 19:21:17 GMT

Are you sure you don’t have Exposure Compensation (EC) dialed in on Av or Tv modes if so set it to 0. Are you using a flash or not? If so remove it for testing and make sure Flash Exposure Compensation (FEC) is set to 0.

Re: Light issues with my 5D mkiii

Chrisc99 — Thu, 19 Mar 2026 19:37:50 GMT

How would i check and where would i find EC please ? and no i wasn't using a flash.

Chris

Re: Light issues with my 5D mkiii

deebatman316 — Thu, 19 Mar 2026 19:51:00 GMT

@Chrisc99 In Av & Tv Modes what would be the light meter is now the scale for Exposure Compensation (EC). It can be accessed from the LCD screen. The area highlighted in the picture is where you need to adjust it. If not already set to 0. It should be set at 0 for the correct exposure. Unless you want to add or subtract Exposure Compensation (0).

Re: Light issues with my 5D mkiii

Chrisc99 — Thu, 19 Mar 2026 19:59:11 GMT

Looking at the LCD was all the way across to -4 having changed it to 0 it has worked.

Thank you

Re: Light issues with my 5D mkiii

Chrisc99 — Thu, 19 Mar 2026 19:59:52 GMT

I will check this at my next show. thanks again, Chris