TMB triplet APO refractor telescopes were the passion of Thomas Back. Thomas Back has a following like few have ever achieved in the field of optical design. Following in the footsteps of his mentor and idols, Roland Christen of Astro-Physics and Al Nagler of TeleVue, Thomas would design some of the finest telescopes commercially available. The legacy left behind after his untimely passing is the Signature Series of telescopes. These instruments represent Tom's ideals of performance, quality, and value while allowing a fellow astronomy to view through his life's passion.