The "12" in your query likely refers to a . In refractor building, a longer focal ratio like f/12 is often recommended for beginners because it:
Norman Remer’s book demystifies this complex process. Refractors require making and aligning multiple glass surfaces—typically four surfaces for a doublet lens. Remer breaks down the physics, math, and manual techniques into actionable steps that an amateur can achieve in a home workshop. Key Highlights of the Book:
Go to archive.org and search “Norman Remer making a refractor” without the PDF extension. Look for files with “12” in the description or page count. That is almost certainly the “12 new” version you want.
: You can find new or used copies at stores like Agena Astro , First Light Optics , and Amazon .
By matching the curves of these two lenses perfectly, the red and blue wavelengths of light are brought to the exact same focal point, yielding crisp, high-contrast images of the moon, planets, and double stars. 3. Step-by-Step Overview of Making a Refractor Telescope making a refractor telescope norman remer pdf 12 new
: Remer originally packed his book with proprietary spreadsheet programs and OSLO (Optical Software for Layout and Optimization) tutorials. These programs automate complex ray-tracing equations, eliminating tedious math.
If you are searching for the , it is often found on dedicated ATM forums, such as Cloudy Nights or specialized telescope-making websites. Modern variations often appear in amateur astronomy publications or as updated guides created by the ATM community. Conclusion
Parts Sourcing & Alternatives
Norman Remer's book was originally published by in 2006. While it has periodically gone out of print, copies can still be found through various channels: The "12" in your query likely refers to a
Variant 7 — Dobson-style Refractor (compact)
: The original book often came with a CD-ROM containing Excel spreadsheet programs . These programs allow users to design a well-corrected lens without needing deep expertise in optical theory.
Unlike a mirror which has one optical surface, a doublet lens has four surfaces (R1, R2, R3, and R4) that must all be ground to precise, calculated curves.
: Often listed as a top resource for lens making on amateur astronomy hubs like Stellafane Publication Details : Norman Remer : 978-0943396620 : 094339662X : Willmann-Bell, Inc. (2006) Amazon.com specific lens design programs or spreadsheets that were originally on the CD-ROM? Remer breaks down the physics, math, and manual
Norman Remer's Making a Refractor Telescope is a beacon for those who wish to explore the rewarding, if challenging, path of building their own refractor. For many, the journey begins right here: in the pages of a book and the simple, powerful decision to begin.
: Shaping the two elements of the doublet lens to exact spherical specifications.
Balanced tube length that is still manageable on standard amateur mounts. Step-by-Step Overview of the Remer Method