Where the adjusting screws are? Pick up a little the outside material to uncover the screws. Use a jeweler's screwdriver.     Celestron Skymaster     Helios Quantum 4     United Optics BA8 (Helios Apollo, APM HD, TS Marine, Oberwerk Ultra etc) * Do not touch the screw marked with the yellow circle.     Image on top, the screws on Vixen Ultima 9x63     Nikon Action (hex key, Allen key)