To permit Bino Vue to reach focus with any telescope, we engineered an optical elimination of its 5.1" path length. Our special compensator lens system makes the Bino Vue parfocal when fully inserted to its stop and results in only a 2x increase in magnification. The compensator lens also corrects for prism effects that can degrade high power viewing.
For short focal length scopes such as Tele Vue's Pronto, Tele Vue-85 and Tele Vue-101, the 2x amplification results in low powers down in the 30x range. Even larger instruments will find the Bino Vue extremely versatile. For example, a 13.5" f/4.5 Dobsonian, would have a low power limit of 96x with a pair of 32mm Pl�ssls.
SCTs have enough focus travel to use Bino Vue without the compensator. For any scope that can accept Bino Vue's 5.1" of path length, we also include an empty tube to install in place of the amplifier assembly.
Finally, Tele Vue tests the collimation and image quality of each unit. This time and labor intensive operation is essential for a binocular viewer used at planetary magnifications. Collimation is critical and delicate. Tele Vue has the facility and expertise to service the Bino Vue should it be required. You always have that assurance with Tele Vue.