topic Re: Over exposed images from my CANON 5DSR suddenly in EOS DSLR & Mirrorless Cameras

Over exposed images from my CANON 5DSR suddenly

tdehan — Fri, 27 Aug 2021 19:47:50 GMT

The past few times I've used my 5DSR the images are over exposed. They are way to bright. I have the ISO at 50 or 100 and they keep coming out to bright. This is happening inside with little light so I can't figure out why this is happening. When I am outside with little light it is even worse. In order to correct it I have to engage Exposure Compensation. I've never had to do this before.

Any suggestions or ideas why this is suddenly happening?

Re: Over exposed images from my CANON 5DSR suddenly

kvbarkley — Fri, 27 Aug 2021 20:15:17 GMT

I assume with multiple lenses?

Does it happen in live view?

Something might be blocking the exposure chip in the mirror box. You can look inside to see if anything is amis. You can use the sensor cleaning facility to look at the sensor, too.

Re: Over exposed images from my CANON 5DSR suddenly

tdehan — Fri, 27 Aug 2021 20:18:09 GMT

Hmmm... I haven't tried with any of my other lens. I've only tried this with my CANON Canon EF 180mm f3.5L Macro USM.

Yes, it happens in LIVE view.

I'm not clear what you mean by exposure chip in the mirror box.

Re: Over exposed images from my CANON 5DSR suddenly

Waddizzle — Fri, 27 Aug 2021 22:06:44 GMT

It sounds like a Safety Shift is kicking. There are actually more than one Safety Shift setting in Canon DSLRs. Look at the bottom setting, which sets a limit on shutter speed.

This is the one that everyone tends to overlook. It is in the ISO menu. The default is 1/125. This setting only kicks in when you are shooting in P or Av modes. I am willing to bet someone dialed this down to 1/8000 to get faster shutter speeds. There is no way to override this setting, except to dial in 1/8000.

Re: Over exposed images from my CANON 5DSR suddenly

tdehan — Fri, 27 Aug 2021 22:49:26 GMT

Min. Shutter Speed on my camera is set to AUTO.

Re: Over exposed images from my CANON 5DSR suddenly

Waddizzle — Sat, 28 Aug 2021 11:55:55 GMT

@tdehan wrote:
Min. Shutter Speed on my camera is set to AUTO.

The AUTO setting means that the focal length of the lens will determine the minimum shutter speed. The AUTO setting is the actual default. When you dial in a manual setting, the default is 1/125.

I only pointed out this [setting] because it is able to override the exposure settings that you think you dialed in. You have not really provided enough info for more insightful advice. A sample photo and exposure settings would be a good start to help others to better understand your issue(s).

Re: Over exposed images from my CANON 5DSR suddenly

jrhoffman75 — Sat, 28 Aug 2021 11:51:07 GMT

1. Does it happen with more than one lens?

2. What mode setting are you using?

3. Have you tried resetting all camera settings in case some settings were activated inadvertently?

Re: Over exposed images from my CANON 5DSR suddenly

tdehan — Sun, 29 Aug 2021 20:46:25 GMT

Yes, this is happening on more than one lens.
I typically when taking pics of flowers shoot in Aperature Priority. However, the issue is also happening in Shutter Priority mode.
Yes, I have done a reset of the camera to factory defaults.

The attached image is an example. I did not use a flash nor did I have the lights turned on in my white/black box. And yet, the image is way to bright and blown out in parts. The background should be jet black and even it's light. It's almost like it is ignoring the ISO setting (which in the image below is 100 and boosting it very high) and or the shutter speed is being ignored for the apperature setting and slowing way down. The details for the image below are:

Canon EOS 5DSR
Canon EF 180mm f3.5L Macro USM
f/3.5
1/4 sec.
ISO-100
180 mm
No Flash
Tripod & Shutter Release

In order to get a decent shot even in this situation is to crank way down the Exposure Compensation. Which is really odd as there is no flash or external light on the subject. Again, this has only recently started happening. I am stumped.

Re: Over exposed images from my CANON 5DSR suddenly

jrhoffman75 — Mon, 30 Aug 2021 00:31:19 GMT

What happens if you shoot outdoors?

EXIF data indicates you used matrix metering. The black background is a significant part of the image and the exposure system is targeted to an overall middle gray.

The histogram for the image you posted looks like this:

The spike is driven by the black background.

But since the cmaera wants to see middle gray I suspect your out of camera histogram/image looks sort of like this:

Negative 2 or so exposure compensation to make middle gray black is not unusual.

Re: Over exposed images from my CANON 5DSR suddenly

wq9nsc — Sun, 29 Aug 2021 23:54:22 GMT

It is probably because you are processing in Adobe, but I noticed in the EXIF data that it reported the wrong focal length for the lens (105 instead of 180mm) I was curious if there was an issue and grabbed a file I shot with my 5DS R and EF 180 f3.5, processed through DPP and the EXIF shows the correct lens and focal length identification.

The ISO is reporting as set according to EXIF and you were shooting with the f3.5 wide open so it isn't like you had selected a narrower aperture and have an issue with the aperture blades sticking at the point of exposure.

Set the camera for manual operation with the aperture @ f3.5, shutter at 1/4, and ISO at 100. Set metering for spot and meter off the center of the blown carnation. With this setup, does the meter in the camera show it is seriously over exposed?

Rodger

Re: Over exposed images from my CANON 5DSR suddenly

tdehan — Mon, 30 Aug 2021 14:06:30 GMT

Sure. However, this has only started to happen recently. I've never had this issue prior with the black background.

I'm still searching to see what could have changed.

Thanks

Re: Over exposed images from my CANON 5DSR suddenly

Waddizzle — Mon, 30 Aug 2021 15:09:46 GMT

What changed? Carefully compare EXIF data.

Re: Over exposed images from my CANON 5DSR suddenly

tdehan — Mon, 30 Aug 2021 20:14:08 GMT

@wq9nsc wrote:
It is probably because you are processing in Adobe, but I noticed in the EXIF data that it reported the wrong focal length for the lens (105 instead of 180mm) I was curious if there was an issue and grabbed a file I shot with my 5DS R and EF 180 f3.5, processed through DPP and the EXIF shows the correct lens and focal length identification.

The ISO is reporting as set according to EXIF and you were shooting with the f3.5 wide open so it isn't like you had selected a narrower aperture and have an issue with the aperture blades sticking at the point of exposure.

Set the camera for manual operation with the aperture @ f3.5, shutter at 1/4, and ISO at 100. Set metering for spot and meter off the center of the blown carnation. With this setup, does the meter in the camera show it is seriously over exposed?

Rodger

Yes, the same thing happens.

Re: Over exposed images from my CANON 5DSR suddenly

wq9nsc — Tue, 31 Aug 2021 01:44:41 GMT

tdehan,

I expected the image to be the same BUT what did the exposure bar in the camera show? If it showed a standard exposure with those settings using spot metering on the blown out portion, then it sounds like a problem with the metering system.

Rodger

Re: Over exposed images from my CANON 5DSR suddenly

klyhthwy — Wed, 01 Sep 2021 22:47:06 GMT

Are you noticing over exposure in your RAW images or JPG images? Could it be the Auto Lighting Optimizer setting? Highlight Tone Priority? Or HDR Mode? Could some of these or other settings be ones you were using but they got switched off. Maybe try settings on as well as off which you might have used in the past to see if possibly one inadvertantly switched off might have affected the exposure.

Maybe try recreating a shot you have done previously where you were satisfied the camera was expsoing correctly and see if the problem exists in that setup. Maybe you have done this already...

Just ideas. Good luck.

Re: Over exposed images from my CANON 5DSR suddenly

tdehan — Fri, 03 Sep 2021 20:35:45 GMT

@klyhthwy wrote:
Are you noticing over exposure in your RAW images or JPG images? Could it be the Auto Lighting Optimizer setting? Highlight Tone Priority? Or HDR Mode? Could some of these or other settings be ones you were using but they got switched off. Maybe try settings on as well as off which you might have used in the past to see if possibly one inadvertantly switched off might have affected the exposure.

Maybe try recreating a shot you have done previously where you were satisfied the camera was expsoing correctly and see if the problem exists in that setup. Maybe you have done this already...

Just ideas. Good luck.

I only shoot in RAW so only RAW images. I checked Auto Lighting Optimizer setting which I've never changed or done anything with. It was set to STANDARD. I've now disabled it to see if that helps. Both Hightlight Tone Priority and HDR Mode are disabled already.