: You can find new or used copies at stores like Agena Astro , First Light Optics , and Amazon .
Search for these (they often contain Remer’s essay as a chapter or appendix): making a refractor telescope norman remer pdf 12 new
The common perception is that lens making is infinitely more complex than mirror making. Remer addresses this directly by explaining that making a lens involves the same common tools and simple practices used for mirrors. While it’s true that a doublet lens requires finishing four surfaces instead of one, all four are , which can be easier to master than the parabolization required for high-quality mirrors. Key Features of Remer’s Guide : You can find new or used copies
If you need a from the book, I can explain the general principle based on known ATM techniques – just ask. While it’s true that a doublet lens requires
For a DIY refractor, an f/12 to f/15 ratio is ideal. Long focal lengths significantly reduce chromatic aberration (the "purple fringe" around bright objects).
: For builders who prefer not to design from scratch, Remer provides detailed prescriptions for lenses ranging from 3 to 8 inches in aperture . The Construction Process