Spherical aberration - Wikipedia
Coma (optics) - Wikipedia
Aberrations and image properties 2
Coma (optics) - Wikipedia
A Practical Guide to Lens Aberrations and the Lonely Speck Aberration Test – Lonely Speck
vik dhillon: phy217 - refractors
How to correct coma ?
Optical aberrations: how to fix errors in your telescope - BBC Sky at Night Magazine
Star Testing Telescope Optics — Starizona
Chromatic aberration
Telescope Types
How We Made 3 Types of Telescopes | CASE First Light
Got Aberrations?
Courses in Astrophotography
Where exactly is the modification that first corrected the spherical aberration in Hubble's primary mirror? - Astronomy Stack Exchange
Aberrations and image properties 1
Telescope appears to have 'astigmatism' unless I look through the left side of the eyepiece. : r/telescopes
L07: Reflectors
Chromatic Aberration Chart - Refractors - Cloudy Nights
Chromatic Aberration - Universe Today
The most comprehensive guide to choosing a telescope, telescope designs and brands, Optics, Optical Quality, Aberrations, Recommended telescopes
Telescope Types
Spherical aberration - Wikipedia
![Apparent Disk of Venus with Chromatic Aberration [Stellar Neophyte Astronomy Blog]](https://2.bp.blogspot.com/-jTmtyWYtinI/UkI0mFE4QoI/AAAAAAAAEBc/hn74_dEvNyo/s1600/apparentdiskofvenus.jpg "Apparent Disk of Venus with Chromatic Aberration [Stellar Neophyte Astronomy Blog]")
Apparent Disk of Venus with Chromatic Aberration [Stellar Neophyte Astronomy Blog]
Refracting Telescopes
