Sony Alpha DSLR- A850 Focusing Screen Replacement

Push in the button next to the lens.

While holding the button twist the lens counter-clockwise.

Pull up and remove lens from camera.

Inside toward the top you will find a small slit in the plastic piece.

Insert a flat head screw driver into the slit and pull down to access the focusing screen.

Using tweezers grab the focusing screen on the side by the two tabs that are on it.

Pull out and remove focusing screen from camera.

When inserting new screen make sure to orient it where the two tabs are facing towards you with the smaller tab facing up.

Angle the focusing screen to make installation easier.

Lay the new focusing screen into the plastic tray.

Insert screw driver into the slit and push up to close.

You will hear a click when the plastic tray is back in place.

When re-installing the lens line up the orange dots that are one both lens and camera.

Fit lens into place and turn clockwise to secure it back to camera.