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EOS Rebel T3i dark in manual mode

Trissw09
Contributor

Hello,

I have a Canon T3i Rebel and for some reason, my photos are dark when I am in this mode. I have tried everything possible feature to try to make the photos brighter, but nothing works. I even tried the flash and it only added a bit of lighting. The strange thing is that this mode worked perfectly before, but for some reason it doesn’t work now. I really hope this camera is not broken. 
thank you!

3 ACCEPTED SOLUTIONS

Accepted Solutions

You'll want to understand the exposure triangle. Assuming that the Auto mode image was properly exposed, let's see what an equivalent exposure would be:

Let's get ISO to be 6400. That's an increase of 4 stops. Let's compensate with 4 stops of shutter, so that would be around 1/1000 second.  But in your Manual mode settings, you were at 1/4000 (another 2 stops) and aperture around 4 stops. That 6 stops under of where you'd need to be.

This is just one scenario.  Basically, if you let in more light with any of the three settings (aperture, shutter, ISO), you need to compensate by decreasing the amount of light with one of the other two.

If all this sounds foreign, explore the exposure triangle. You'll need to master that in order to be able to work with Manual mode.

--
Ricky

Camera: EOS R5 II, RF 50mm f/1.2L, RF 135mm f/1.8L
Lighting: Profoto Lights & Modifiers

View solution in original post

I’m thinking the same thing too. How is the OP getting these settings. I don’t think they fully understand how to use manual mode. My mom still owns her EOS Rebel XSi and I believe the max shutter speed was 1/2000th but my EOS 40D was 1/8000th. The flash definitely isn’t powerful enough for those settings.

-Demetrius
Bodies: EOS 5D Mark IV
Lenses: EF Holy Trinity, EF 85mm F/1.8 USM
Speedlites: 420EX, 470EX-AI, 550EX & 600EX II-RT

View solution in original post

Perfection.

I'm genuinely glad that you're now ready to dive into manual.

That's the beauty of this forum, you can ask a question and even if it is imprecise, the experts (not calling myself that) will help you.

Thank you for letting us help you.

View solution in original post

25 REPLIES 25

deebatman316
Elite
Elite

Are you sure you're using the correct settings for the current ambient lighting. Where are pictures being taken in a dark area or bright area. What are the settings you're using. Have you used Manual Mode before.

-Demetrius
Bodies: EOS 5D Mark IV
Lenses: EF Holy Trinity, EF 85mm F/1.8 USM
Speedlites: 420EX, 470EX-AI, 550EX & 600EX II-RT

FloridaDrafter
Authority
Authority

If it's not to much trouble, post some of your dark photos to a sharing site like DropBox, Google drive,etc. Just be sure to make them sharable and please include EXIF data so we can see what your camera settings are.

Newton

rs-eos
Elite
Elite

The next time this happens, put the camera in Auto mode and take another photo. In Auto mode, is the photo also dark? If not, compare the settings that Auto used vs the settings you used in Manual.

Another possibility is that the current scene you're in is just too dark.

--
Ricky

Camera: EOS R5 II, RF 50mm f/1.2L, RF 135mm f/1.8L
Lighting: Profoto Lights & Modifiers

LeeP
Rising Star
Rising Star

Intriguing issue.

On a tangent, what kind of situation are you shooting that needs manual?

I used to have a T3i and its automatic exposure was sufficiently precise that I rarely went to manual.

Some hobbyists act as if manual is the Holy Grail and without it, "you're not a real photographer", which is nonsense.

While you are awaiting a possible solution, hop to automatic exposure and if the results are OK--you can do exposure bias very easily--then don't worry about the glitch with manual.

With the T3i being as old as it is, getting use out of it is probably the main goal.

I have used manual mode before and it has worked perfectly. The pictures are being taken in a bright area and even with the flash, but they are still dark. I have turned the ISO all the way up and it only makes a small difference. I have messed with exposure but that failed as well.

I can try this thank you

This is part of the problem. What's strange is that in all of the other modes, the camera works perfectly. But for some reason only in manual it doesn't work properly. I have been in a decently bright room even using the flash and it still is dark.

Well, I don't for sure need to use manual mode for everything, it's just disappointing to have a camera that doesn't work completely. I agree with you saying that manual mode isn't necessary, and yes the camera is older haha.

Did you perform the experiment I outlined? When you next use Manual mode and the image turns out dark, switch to Auto and take another image. Compare the settings used for each (aperture, shutter and ISO). Share the results here so we can better assist you.

--
Ricky

Camera: EOS R5 II, RF 50mm f/1.2L, RF 135mm f/1.8L
Lighting: Profoto Lights & Modifiers
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