Product Description “Decades of experience concentrated into the highest possible SNR.” — Stephen F. Tonkin, Author Binocular Astronomy “Bill Cook is a seasoned optical professional who has perfected ‘everything binocular’ with his no nonsense approach to straightening the curves of understanding concerning them. With an unmatched writing style, his vignette on Collimation vs. Conditional Alignment is spot on!” Detalles del producto Editorial : CreateSpace Independent Publishing Platform; 1er edición (30 Agosto 2017) Idioma : Inglés Tapa blanda : 196 páginas ISBN-10 : 1548932191 ISBN-13 : 978-1548932190 Peso del producto : 9.6 onzas Dimensiones : 6 x 0.45 x 9 pulgadas