Thenew pier adapter rotates on a bearing surface for ultra-smooth operation. Thisallows you to lock the mount down with no need to loosen the base during azimuthadjustment. This option is especially recommended for use in the field. You maywish to purchase two or more of these assemblies to install on separate piers.Perhaps you have a permanent observatory and a portable pier for traveling todark sky sites. The Standard 1200 Pier Adapter (1200SPA) is another option toconsider.

The Rotating Pier Adapter includes two machined plates, four machinedaluminum lock knobs with 5/16 x 1.5"OD flat washers, azimuth adjusterblock, six 5/16-18 x 5/8" socket buttonhead screws and 5/16 x 9/16"ODx 0.060" flat washers. All machined parts are black anodized and thefasteners are stainless steel. This adapter will mount directly into an Astro-PhysicsPortable Pier. If you plan to use an ATS Pier, the O.D. of the plate will bemodified by ATS for an additional charge.