M100 shows just how far Hubble has come since spherical aberration – Astronomy Now
Coma (optics) - Wikipedia
Spherical aberration - Wikipedia
vik dhillon: phy217 - refractors
![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]
astronomical optics, part 4: optical aberrations
Coma (optics) - Wikipedia
vik dhillon: phy217 - reflectors
L07: Reflectors
The most comprehensive guide to choosing a telescope, telescope designs and brands, Optics, Optical Quality, Aberrations, Recommended telescopes
Refracting & Reflecting Telescopes | Science at Your Doorstep
Telescope Types
astronomical optics, part 4: optical aberrations
Star Testing Telescope Optics — Starizona
astronomical optics, part 4: optical aberrations
Telescope Types
Chromatic Aberration - Universe Today
L07: Reflectors
Spherical aberration - Wikipedia
How does making a refracting telescope very long reduce the chromatic aberration of an uncorrected lens? - Quora
