The Backyard Astronomer's Guide - 4th Edition Revised & expanded - Terrance Dickinson & Alan Dyer Observing Accessories About the Explore Scientific 24mm

About the Explore Scientific 24mm 68 Degree Series Waterproof Telescope Eyepiece - 1

75 (photographic mode) -

Working both with and without a telescope

A strong spring and a threaded twist lock provide a two-level strong and secure grip on the optical instrument’s eyepiece so you can image with confidence

They build and test the rack and pinion focuser into the TeleVue NP101is APO - Imaging System Refractor Telescope to hold 12 lbs

The Backyard Astronomer's Guide - 4th Edition Revised & expanded - Terrance Dickinson & Alan Dyer Observing Accessories About the Explore Scientific 24mmREVISED AND EXPANDED EDITION This classic, groundbreaking astronomer's guide has been the go to field guide for both beginning and experienced amateur astronomers for nearly 30 years. The fourth edition, revised, brings Terence Dickinson and Alan Dyer's invaluable manual completely up to date. Setting a new standard for astronomy guides, it will serve as the touchstone for the next generation of stargazers as well as longtime devotees. Technology and