One PCS of monocular right angle reflex focusing viewfinder for Toyo or Omega 4x5" field and view large format camera, it can rotate 90 degrees for vertical viewing in portrait mode or horizontal in landscape mode and provides 2x image magnification, the image of up and down are correct, right and left are reverse. Comaptible with all Toyo and Omega 4x5" field large format cameras, like 45G, 45GX 45D, 45CF, 45A, 45A II etc.....