EOS 90D: The object I see in viewfinder is different with real object in screen

[AdoNetok]

I am using Canon 90D.

The object I see in viewfinder is different with real object in screen.

For example, when I view a object in viewfinder, it is at meddle of viewfinder but when I took a shot and then view on the screen the object is more closer to the bottom.

Is it possible to adjust it? 

[jrhoffman75]

Perhaps you are moving the camera when you press the shutter button?

Try testing with camera on a tripod.

[stevet1]

AdoNetok,

Just as an experiment, put your camera in Live View and take a few shots. How do they compare?

Also, take a few shots with a remote control. See if you are doing as John hypothesized and pulling down on the camera little bit when you press the shutter.

Steve Thomas

[Finelld]

It sounds like your mirror isn't returning to its home position properly.  As stevet1 recommended see if there is a difference framing using live view vs through the viewfinder.  If you do see a difference, ensure the mirror box is clean and free of any foam deterioration or debris.  IF this doesn't isolate or solve your problem you might need to get your camera serviced.

[normadel]

Is your object standing still or moving?

Are you sure you are not moving the camera up or down when you press the shutter button?

Have you moved the photo to a computer and opened it there to see what it looks like?

No, you can't adjust the framing of a shot after you take it. You need to investigate your technique.