TeleVue FoneMate Smart Phone to EP Adapter - SFA-0001 type-astrophotography and imaging accessories Sky-Watcher's Teflon bearing system is

Sky-Watcher's Teflon bearing system is preferable to the use of ball-bearings

Description 3" Field Flattener

The larger 2” barrel allows you to see a bigger percentage of the telescope’s light cone

or sports optics

Easy dovetail connection

TeleVue FoneMate Smart Phone to EP Adapter - SFA-0001 type-astrophotography and imaging accessories Sky-Watcher's Teflon bearing system isTeleVue FoneMate Smart Phone to EP Adapter This TeleVue FoneMate smart phone adapter is a convenient way to enter the world of Digiscoping. FoneMate can connect any of TeleVue's recommended eyepieces to phones sized from about (width x height): 60 x 114 mm (2 5 16" x 4 ") to 120 x 212 mm (4 ; " x 8 5 16") in size. To minimize vignetting and maximize image quality, see the "Eyepiece Specifications" table (found on TeleVue's web site) for eyepieces