The Takahashi 7x50mm Finderscope is a doublet refractor [Image Credit: Takahashi] . Specifications Aperture :  2.0 in. [50 mm] Focal...

The TeleVue Ethos eyepiece line has redefined the ultra-widefield observing experience [Image Credit: TeleVue] . Introduction It took some time for me to realize that a seismic shift was about to take place in amateur astronomy when TeleVue announced a new eyepiece design at the 2007 Northeast Astronomy Forum. I had been using the Nagler Type 4 and Type 5 series for almost a decade; and like most other owners of this venerable eyepiece line, couldn't really see how TeleVue co

The TeleVue Nagler eyepiece line is an industry standard in the field of astronomy [Image Credit: TeleVue] . Introduction I was working...