5D Mark 3 LCD preview question.

Immediately after taking a shot with the 5 D Mark 3 I look at the LCD to review the image. I have the LCD preview set for 3 seconds. When I look at the image it looks kind of like a dull RAW file. Perfectly exposed but the LCD preview shows a flat, dull image. Then if I hit play to view the image again.....sometimes it looks the same dull way.......other times it looks snappy and brilliant just like it should. It is not that one image is flat because of the scene. I can take side by side duplicate photos of a landscape for example and when reviewing the image on the LCD it will sometimes look flat and dull.....other times look vivid and crisp (the way it should look).

I don't know why that happens. I looked at the manual but could not find the reason for this. I am sure it's something easy or that I overlooked.

Anyone know what the deal is with this?

The LCD preview is set to auto brightness btw.

Thank you.

It's the auto brightness that's causing the problem set it to manual and adjust to your taste it will look very different

Exactly. When you take the photo, your face is covering the light sensor at the back of the camera, so the camera adjusts the display backlight down. Thus the image looks dull.
The next time you look at the image, you press the image review button with the rear of the camera facing the sky, thus telling the camera that the surroundings are bright, so it raises the illumination level for the display.

Frank Canon wrote in post #15197538
It's the auto brightness that's causing the problem set it to manual and adjust to your taste it will look very different

That did it. Thank you very much.