Guides: Colour Filters To Improve Lunar and Planetary Visual Observing | First Light Optics
Ultimate Guide to Telescope Filters - AstroJunkies.com
Wratten number - Wikipedia
🎈 Public Lab: Red Filter Rising
Filters: filters with Warren numbers vs filters rated in nm - Eyepieces - Cloudy Nights
Spectral properties of Wratten filter series suitable for NIR... | Download Scientific Diagram
Telescope filters: a beginner's guide | BBC Sky at Night Magazine
Photomicrography - Filters for Black and White Photomicrography | Olympus LS
Star City Photos - My Filter Flip Book
Wratten filter specs
Transmittance curve of a new (right) and well used (left) Kodak Wratten... | Download Scientific Diagram
Choosing a Color/Planetary Filter
Kodak Wratten Filters | Edmund Optics
Advice sought - filters for planetary imaging - Imaging - Discussion - Stargazers Lounge
🎈 Public Lab: A Wratten 25A replacement from Rosco?
Technical
Gelatin and polyester colour filters - Filters - Comar Optics
Selected KODAK WRATTEN Gelatin Filters Discontinued
Color Filters for Black-and-White Photography: A Complete Guide | PetaPixel
Kodak 3x3" (75mm) 82 Color Conversion Wratten 2 Optical 1936111
Optolong filter test results - Eyepieces - Cloudy Nights
Wratten 18A filter for UV photography
Reflected infrared photography: Filters
