Using Teflon or modern plastic spacers, designed with computer modeling, to prevent lens edge stress (edge astigmatism).
Building an achromatic refractor is a significant workshop project. Success hinges on having the right tools for the job: making a refractor telescope norman remer pdf 12 new
This book is a staple for collectors and active builders. You can find new or used copies at major retailers: : Frequently lists used and collectible copies. Using Teflon or modern plastic spacers, designed with
A series of internal rings with sharp edges must be placed inside the tube. These block stray reflections and ensure the background sky looks jet-black. You can find new or used copies at
This write-up outlines the process for designing and building a classic achromatic refractor telescope (12-inch objective, “new” implying modern materials/techniques), inspired by traditional guides such as Norman Remer’s practical manuals. It covers goals, optical design choices, parts and materials, mechanical construction, alignment and testing, and suggested improvements. Assumptions: budget-conscious amateur builder aiming for a large, high-quality visual/astrophotography refractor using contemporary glass, coatings, and fabrication methods.
: The book includes specialized software (originally on a CD-ROM) to help builders calculate the exact radii and thicknesses needed for their glass.