Polar Alignment Camera Mounts This bracket provides a mount-independent way to attach your QHY PoleMaster or iOptron iPolar to your telescope or mount for polar alignment. For example, you can attach the camera directly to a Vixen bar on top of the scope, or in a finderscope shoe, etc.The system consists of two parts: a bracket for your camera and one of several different attachments. Technical Specifications Polar Camera Compatibility: PoleMaster-Bracket Universal Bracket to Mount a QHY PoleMaster iPolar-Bracket Unversal bracket to Mount an iOptron iPolar Bracket Attachment Compatibility: Attachments (1 attachment is included in the price of the PoleMaster Bracket) LSaddle Losmandy saddle that clamps onto Losmandy/"D" rails VSaddle V-type saddle that clamps onto a Vixen bar/rail VBar Vixen type bar that slips into a V-type clamp ADM-MDS-Saddle ADM Mini Dovetail System saddle that clamps onto a MDS dovetail bar ArcaSwiss-Saddle Arca-Swiss saddle that clamps onto an Arca-Swiss rail ArcaSwiss-Bar Arca-Swiss bar that slips into an Arca-Swiss clamp Synta-Bar-20mm Synta/Vixen bar that slips into a Synta/Vixen finder base, 20mm tall Synta-Bar-50mm Synta/Vixen bar that slips into a Synta/Vixen finder base, 50mm tall