Canon 80D pictures a overexposed

[Assaf]

i just cant get my head around it.

the pictures looks good on live view. the histogram looks fine when i take the picture its completly overexposed.
i have being told it might have something to do with the lens im using is very old (manual 50mm 1.8 olympus)
but this lens worked great with my old camera (600D)

is there any reason for why the camera is suddenly decided to give me a headache?

[kvbarkley]

What mode are you in? Does it happen in manual mode?

[Assaf]

indeed, i forgot to mention that i was shooting at manual

[RobertTheFat]

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@Assaf wrote:

indeed, i forgot to mention that i was shooting at manual

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And your shutter speed and aperture settings matched what the meter in the viewfinder told you? Live view isn't a reliable indicator, because it tries to show you a properly exposed image, regardless of your settings. Most cameras have an option to have it instead show you what you're actually going to get, but that option isn't active by default.

[Assaf]

i was relying on the histogram not what the liveview is showing me.
witch shows a change. before taking the picture he pritty much, shows that the he is high on midtones and shadows but low on highlight. on the other hand its all highlight on the picture after being taken.

when it comes well as i said its a manual lens an old one.so apparture is also need to adjusted manually
but as i said it was never a problem with my previus camera. so i find it confusing.

[diverhank]

Go to the menu and make sure the Live View has the Simulation Enabled option activated.  Then what you see on live view is what you will get.

[TCampbell]

I'm wondering if the aperture blades aren't working on the lens.

Suppose you plan to shoot at f/8 using your 50mm f/1.8 lens.

While you compose a shot looking through the viewfinder, the aperture blades are wide open (to f/1.8).  If you use live-view, rember that it's "exposure SIMULATION" ... so it still keeps the aperture blades wide open (they aren't stopped down to f/8) but the camera will "simulate" the exposure on the viewfinder.

When you take the shot, the aperture blades are supposed to stop down to f/8 before the shutter opens.  But if the aperture blades don't do this, then you would get an over-exposed shot.

You might want to press the "Depth of Field Preview" button on the camera while looking through the lens to make sure the aperture blades are working.

[Assaf]

it was already opened, well i guess it means i have to get a new lens.

[kvbarkley]

(manual 50mm 1.8 olympus)

What does olympus mean here?

If it is a totally manual lens, no wonder that the camera is confused.

[TCampbell]

The good news is the Canon EF 50mm f/1.8 STM is the most affordable lens in the lineup... it’s about $125 for a new lens.