Interesting links
Astronomy

Optics:

Collimate:

• https://www.youtube.com/ (How To Collimate A Refractor, Dark Sky Geek) NEW November 2025
• https://www.cloudynights.com/ ... (Collimating a Maksutov-Newtonian with a Howie Glatter Laser Collimator, Cloudy Nights)
• https://www.youtube.com/ ... (How To Collimate A Basic RC Telescope, AstroAddict)
• https://www.astrofotoblog.eu/ ... (Worldwide coma correction exercise, Astrofotoblog)
• http://interferometer-tests.blogspot.se/ ... (GSO RC 10", Interferometer test, Tommy Nawratil)
• http://stevesastro.blogspot.com/ ... (Collimating RC telescope, Steve's Adventors)

Ray Trace, DIY:

• https://www.youtube.com/ ... (Schmidt Telescope Designed in APEX, Lanika Solutions) NEW December 2025
• https://www.youtube.com/ ... (Schmidt-Cassegrain telescope (SCT), Telescope Optics) NEW December 2025
• https://www.youtube.com/ ... (Sub-aperture corrector: Field-flattener, Telescope Optics) NEW December 2025
• http://www.bbastrodesigns.com/ ... (Newtonian Telescope Designer, Mel Bartels)
• https://stellafane.org/ tm/newt-web/ ...
  (Newton telescope Web design tool by Kenneth H. Slater, math and physics by Dale Keller)
• https://www.youtube.com/ ... (Make Your Own Optical Lenses, Breaking Taps)

Field correctors:

• https://www.youtube.com/ ... (BAADER MPCC MARK III Coma Corrector Review and Proper Spacing For Dobsonian Telescope, Keep it simple)
• https://www.cloudynights.com/ ... (Coma correctors - does it matter which one, Cloudy Nights)
• http://www.sfu.ca/ ... (Correct a SCT telescope with a coma corrector, Duncan Munro)

Optic analyze:

• https://docs.kde.org/trunk5/ ... (KStars: Focus aberration inspector, KDE)
• https://www.astroworldcreations.com/ ... (KStars 3.6.8: Aberration inspector to analyze back focus and sensor tilt, Astro World Creation)

Optic others:

• https://www.youtube.com/ ... (Making Large Telescope Mirrors, Palomar Observatory) NEW February 2026
• https://www.youtube.com/ ... (RASC-TC Thin Meniscus Mirrors, RASC Toronto) NEW January 2026
• https://wp.optics.arizona.edu/ ... pdf (Lens Design OPTI 517, Prof. Jose Sasian) NEW January 2026
• https://www.youtube.com/ ... (Making a Deformable Mirror, Huygens Optics) NEW January 2026
• https://www.youtube.com/ ... (Casting a light weight telescope mirror, Omegageek) NEW January 2026
• https://en.wikipedia.org/ ... (Anti-reflective coating, Wikipedia) NEW January 2026
• https://www.researchgate.net/ ... (Solar Energy Management Using a V-Groove, Researchgate) NEW January 2026
• https://www.teleskop-express.de/ ... PDF (Refracktors general information and tips, Teleskop Express) NEW November 2025
• https://www.youtube.com/ ... (Can THIS remove my Newtonian star spikes, and turn it into a refractor, The Lazy Geek)
• https://www.youtube.com/ ... (Why 10,000 tiny lenses are the key to our sci-fi future, Freethink)
• https://www.youtube.com/ ... (How a Lens Creates an Image, Huygens Optics)
• https://www.youtube.com/ ... (How to Clean a Vintage Lens with a Huge Fungus Infection, Mathieu Stern)
• https://www.youtube.com/ ... (How To Do High Resolution Planetary Astrophotograhy, Damian Peach)
• https://www.altairastro.help/ ... (Star testing a modern ED Doublet refractor, Altair)
• https://www.youtube.com/ ... (Pentax 67 300mm Lens, Fix Old Cameras)
• https://www.thingiverse.com/ ... (Bahtinov mask generator, Bot-ork)
• https://www.dpreview.com/ ... (Japan sends a modified Pentax 300mm F4 lens into space aboard its Kitsune 6 microsatellite, DPreview)