topic Re: 90d: Photos over exposed (double iso) when shooting in non live view mode in EOS DSLR & Mirrorless Cameras

90d: Photos over exposed (double iso) when shooting in non live view mode

vizualequalizer — Sat, 05 Dec 2020 18:24:59 GMT

I have a Canon eos 90d and the photos are over exposed when shooting in non live view mode (when switching back-and-forth between live view and viewfinder modes; the ISO doubles), or another words looking through the viewfinder, the ISO will double. There's no exposure addition or subtraction on exposure stops. I am confused please help!

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

Waddizzle — Sat, 05 Dec 2020 18:50:57 GMT

If you have not already downloaded a copy of the full User Manul from Canon Support, then I suggest that you do so.

Without knowing what lens are using, what your camera is looking at, what camera settings you are using, there is no way anyone could possibly advise you on what is going wrong for you.

Please try to provide enough informatiuon so that someone else can duplicate your problem.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

jrhoffman75 — Sat, 05 Dec 2020 19:44:53 GMT

Are you in Auto ISO mode?

Forum member ray-uk posted this on DPReview a few years ago:

Viewfinder vs live view metering, the facts.: Canon EOS 7D / 10D - 90D Talk Forum: Digital Photography Review (dpreview.com)

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

vizualequalizer — Sat, 05 Dec 2020 22:13:39 GMT

My apologies.

I have the Sigma 18-35 F1.8 DC lens. It is in auto ISO mode for all these modes: SCN, A+,P,Tv,Av. I am looking through the manual. I just haven't found out why it seems to overexpose or add exposue/iso when looking through the view finder. My intuition makes me think it's a simple setting somewhere. Thank you for the help, much appreciated.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

vizualequalizer — Sat, 05 Dec 2020 22:31:32 GMT

Thanks for that post. Not sure if that's the case here, it's good insight.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

Waddizzle — Sat, 05 Dec 2020 22:35:24 GMT

@vizualequalizer wrote:
My apologies.

I have the Sigma 18-35 F1.8 DC lens. It is in auto ISO mode for all these modes: SCN, A+,P,Tv,Av. I am looking through the manual. I just haven't found out why it seems to overexpose or add exposue/iso when looking through the view finder. My intuition makes me think it's a simple setting somewhere. Thank you for the help, much appreciated.

That setup and camera setting info is a good start. Could post a sample of each shooting scenario: Live View vs Viewfinder?

What are you photographing? Are you using a tripod? What metering mode, and AF mode, is used for Live View? Same question for shooting through the viewfinder.

When you post the photos, you can use Canon DPP4 software to reduce the files size, and include the EXIF data. The EXIF data can dell us what is happening. But, there are a couple of things it doesn't tell us, though. It will tell us "1 Pt AF", but t does not tell us which AF point you sued.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

vizualequalizer — Sat, 05 Dec 2020 23:15:37 GMT

Thanks for taking the time "Waddizzle" and for the instructions, much appreciated.

I saved them as EXIF JPG using DPP4, hopefully that was in line with what you requested regarding EXIF data.

Both Handheld:

Metering mode for OVF (Optical View Finder) is: evaluative and focus is: AI Focus.

For Live View, metering is: evaluative and for focus: AF 🙂 (Face) + [] (Tracking).

Live View (left or top) vs. OVF (right or bottom).

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

vizualequalizer — Sat, 05 Dec 2020 23:18:27 GMT

Thank you much for the help, not sure these pictures posted correctly, I saved them using DPP4 to included EXIF data, but how are you going to see that from the files posted in my answer? Do I need to include the data separately? Thanks

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

Waddizzle — Sun, 06 Dec 2020 00:38:03 GMT

@vizualequalizer wrote:
Thank you much for the help, not sure these pictures posted correctly, I saved them using DPP4 to included EXIF data, but how are you going to see that from the files posted in my answer? Do I need to include the data separately? Thanks

I do not see any EXIF shooting data.

The images are extremely small, too. Using a non-Canon lens should not be a factor, not at least when it comes to exposure. One seems quite over exposed by at least one stop, while the other is under exposed by at least one stop. Hard to tell with such small images.

Try this experiment outdoors, if you can. You could be looking at a light flicker issue associated with the artificial lighting.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

jrhoffman75 — Sun, 06 Dec 2020 00:39:07 GMT

Hello.

I can't download these files as JPEG; they show up as an unknown file type only 20kb in size.

I did some experimentation with my camera (a 1D series).

I set a fixed ISO of 1600 in Av mode, thus the only variable would be shutter speed. Evaluative metering for both modes. Center single point focus for both modes.

One mode gave a SS of 1/13, the other 1/20.

That seems to support the DPReview post,

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

jrhoffman75 — Sun, 06 Dec 2020 01:46:15 GMT

Some other observations; they won't necessarily affect what you are seeing now, but they are things to consider.

1. you stated you used AI Focus mode. That is an "inteligent" mode in the camera that is supposed to switch between One Shot and I Servo depending on whether the camera detects motion. It tends to not be a very effective mode. First, AI Servo is really for situations where the subject is moving towards or away from the camera. It compensates for the fact that if the subject is moving the focus distance could change between when the shutter button is pushed and when the shutter actually fires. Outside of wildlife, sports and kids playing in the backyard you really don't need AI Servo.

Similarly in Live View - you are using people, face, eye detection. None of those are in your subject.

Single point, usually center is what you generally want.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

jrhoffman75 — Sun, 06 Dec 2020 00:52:07 GMT

When you convert and save try these settings:

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

Waddizzle — Sun, 06 Dec 2020 01:00:57 GMT

@jrhoffman75 wrote:
Hello.

I can't download these files as JPEG; they show up as an unknown file type only 20kb in size.

I did some experimentation with my camera (a 1D series).

I set a fixed ISO of 1600 in Av mode, thus the only variable would be shutter speed. Evaluative metering for both modes. Center single point focus for both modes.

One mode gave a SS of 1/13, the other 1/20.

That seems to support the DPReview post,

I tried a similar test with a 6D and a Sigma 35mm f/1.4 Art. I shot at f/4 and ISO 800. One had 1/8 SS and 1/10 SS. The camera has no anti-flicker setting. I tried the same test with a 6D2 and got 1/6 and 1/8 SS. In both cases, the slower SS was Live View.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

vizualequalizer — Sun, 06 Dec 2020 02:41:22 GMT

Thanks for all the help.

I am reposting the photos, they should be downloadable.

I did notice the flicker alert going off when I shot the one in the OVF (Optical View Finder).

Notice in live view the ISO was 400 and in OVF ISO is 1600.

live view is IMG_0315 and OVF is IMG_0316

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

Waddizzle — Sun, 06 Dec 2020 03:24:02 GMT

John had asked if you had used ISO Auto, and you replied that you did in a few different modes. All of those modes allow the camera to control 2 out of the 3 legs of the Exposure Triangle. The camera my increast the ISO, but also change another setting to balance the expoxure.

You also shot handheld, which means the locked in focus point may have been different. For Evalluative Metering, this last can make a difference in how the camera may meter a similar scene. I did my shooting tests from a tiripod, and I would assume that John did the same.

I suggest that you take another set of test shots under more controlled conditions. Use a tripod, Because I used Av mode, which is the same as what John had used, I dialed in ISO 800 so the camera only controls the shutter speed.

If you wish to test ISO Auto, then use M mode. Take a test shot using P mode, and then use those shutter speeds and apertrue settings similar to your test shot.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

vizualequalizer — Sun, 06 Dec 2020 03:56:31 GMT

Appreciate all the feedback.

I would just like to throw in, that in the P mode, ISO set at 800, I've tried all the different metering modes, but it seems like for whatever reason, in OVF mode the camera is adding significant exposure.

I've never encountered an issue like this in all my years shooting. My intuition tells me that it is setting somewhere in the menus. I am trouble shooting and holding everything constant whilst adjusting only one variable. But I haven't found the issue.

I find it interesting that in OVF mode the camera is adding that much exposure on it's own. I get that between the two VIEWING modes, there is a diefference in the way it meters.

In the P mode, holding ISO constant at 800 and the aperterure at F1.8 in live view the SS is at 1/60. In OVF (same constants ISO 800 and F1.8) the SS is 1/6.

I am most curious as to why!??

P.S. Also surprising is that seems like an isolated incident, as know one else here (so far) or from I'm researching online really has had the same issue. I will try and reset the camera's factory settings.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

jrhoffman75 — Sun, 06 Dec 2020 04:16:13 GMT

Whenever you think the camera is acting strange you should reset the camera to factory settings. It will clear any inadvertent settings.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

vizualequalizer — Sun, 06 Dec 2020 04:17:32 GMT

Also FYI. Shooting in M mode, dialing in my own numbers, once set, if dialed in according to live view (correct exposure stop at 0) then once in OVF the exposure stops indicate a full 2 stops lower. That has my curiosity in gear.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

vizualequalizer — Sun, 06 Dec 2020 05:30:41 GMT

Cleared all the camera settings and still OVF adding +2 stops compared to live view. I don't get it.

Re: 90d: Photos over exposed (double iso) when shooting in non live view mode

jrhoffman75 — Sun, 06 Dec 2020 11:37:43 GMT

Try a different scene, maybe go outside and use your home as a subject. The current scene is quite challenging with extreme brightness differences.