Starlight Instruments - Feather Touch® 2.0 " Dia Dual Speed 1.5 " DTT, Brake, CRing

Feather Touch�® 2.0" Dia Dual Speed 1.5" DTT, Brake, CRing 1.5" Draw Tubes * Using non-vignetting, short adapters for Meade 10" and larger scopes will generally let the focuser swing through the fork arms of these type of Schmidt-Cassegrain Telescopes (SCTs). * Mounting base adapters for 7" through 9.25" Celestrons and Meades, for 11" and larger Celestrons, and for 10" and larger Meades have enough internal length to allow the long drawtube travel of this focuser to be used. However, they typically will not allow the focuser to swing through the fork arms of the smaller aperture scopes, depending on the length of the accessory stack attached to the focuser. * German mount SCT scopes do not have this potential swing-through problem and the focuser can readily be used with any base adapter. Our 2.0" Series... In general, 2.0" Feather Touch Focusers can be used on refractor-style telescopes, they can also be used with Newtonians in certain situations depending on where the focal point resides. Basic Componants of the Feather Touch 2.0 inch Diameter Focuser In our standard model, the base of the adapter is not threaded, instead it uses a 2.7" flange type connector. A base-adapter or tube adapter ring (TAR) is required in all cases for installing the focuser onto your telescope. Optional mounting base adapters are available for installing the focuser on catadioptric rear cells as well as on reflector optical tubes and truss-tube Dobsonian secondary mirror cages. There are coarse and fine focus knobs with an approximate reduction ratio of 10:1 for unrivaled accuracy and repeatability. Each revolution of the fine focus knob results in a mere 0.070 inches of drawtube travel, making critical focus effortless. Fine focus repeatability is on the order of <0.0005 inches.