Bibliography Details

“Questar Catadioptic Apochromatic Telescope Variable Focal Length: 45.5" f/13.” eBay, July 7, 2021. https://www.ebay.com/itm/313595466085.

The following is a complete listing of all citations using this source:

§ 2.1. Characteristics of Early Questar Telescopes

• Citation No. 1

Timeline

• Citation No. 2