5200 -- when looking through the EVF viewfinder, the image is very blurred, but when I look through the LCD monitor, it is not blurred. What can I do to correct this?

Is there an image showing in the eyepiece/viewfinder? If so, look for and press a small button labeled 'EVF/LCD' to switch the image to the screen.

Try adjusting the diopter. There's a knob near the upper-right corner of the viewfinder. Turn the knob while looking at the viewfinder.

See the "Diopter adjustment" section on page 39 of the manual.

On cameras like these you cannot compose a picture on the LCD screen. You have to use the viewfinder and check the results on the screen afterwards. The viewfinder is not actually an electronic viewfinder, you are looking through the lens via a mirror as was the case on film cameras. When you press the shutter the mirror swings up and lets the image through to the ccd chip just as if it was a film camera.

Have you removed your lens cap? Have you turned it off? Does the small viewfinder work? if so go to the menu,,, not sure on your model if it has a separate button to turn it on and off, look in your manual for EVF

There is most likely a setting in the camera's menus so that you can switch between live view and the eyepiece. Search around, or check your manual.

does the LCD monitor work when taking a picture? if not press the evf/lcd button to toggle between the viewfinder and the LCD screen

After a quick look at the manual you can find in the setup menu 3 "reset defaults" which shoud set you camera back to its first settings.

If you turn on the back LCD, the electronic viewfinder will remain on while in a shooting mode. There is no setting on the camera to use only the back LCD monitor while shooting. If you playback images in the Play mode, only the LCD monitor will turn on. However, if you press the Monitor button while in the Play mode, than the back LCD monitor will turn off. The image will display only in the viewfinder LCD.

If you turn on the back LCD, the electronic viewfinder will remain on while in a shooting mode. There is no setting on the camera to use only the back LCD monitor while shooting. If you playback images in the Play mode, only the LCD monitor will turn on. However, if you press the Monitor button while in the Play mode, than the back LCD monitor will turn off. The image will display only in the viewfinder LCD.

If you turn on the back LCD, the electronic viewfinder will remain on while in a shooting mode. There is no setting on the camera to use only the back LCD monitor while shooting. If you playback images in the Play mode, only the LCD monitor will turn on. However, if you press the Monitor button while in the Play mode, than the back LCD monitor will turn off. The image will display only in the viewfinder LCD.