Baader contrast booster - Discussions - Eyepieces - Stargazers Lounge
Wratten Filters for CA Correction in Achromats? - Page 3 - Getting Started With Observing - Stargazers Lounge
2013 12, PDF, Mars
filter against chromatic aberration for achromats - Page 3 - Refractors - Cloudy Nights
Astronomy - Single Bandpass and Single Edge Filters
Which Filter for 4 f/5 Achromatic Refractor? - Discussions - Scopes / Whole setups - Stargazers Lounge
Wratten Filters for CA Correction in Achromats? - Page 4 - Getting Started With Observing - Stargazers Lounge
Optical Filter Sets for Astronomy Applications
Lunar Observing Equipment
Schurs Astrophotography
Optical Filter Sets for Astronomy Applications
Wratten Filters for CA Correction in Achromats? - Getting Started With Observing - Stargazers Lounge
Optical Filter Sets for Astronomy Applications