Gelatin and polyester colour filters - Filters - Comar Optics
Photomicrography - Kodak Filters for Black and White Photomicrography | オリンパス ライフサイエンス
Tricolour – Filters etc. – Darkside
Star City Photos - My Filter Flip Book
Spectral properties of Wratten filter series suitable for NIR... | Download Scientific Diagram
Orion 1.25" Premium 20-Piece Color Planetary Filter Set | Orion Telescopes & Binoculars
Ultimate Guide to Telescope Filters - AstroJunkies.com
Filtration
Choosing a Color/Planetary Filter
🎈 Public Lab: A Wratten 25A replacement from Rosco?
Company Seven | Baader Planetarium 1.25 inch Color Filter Description Page
Filter Curves
Reflected infrared photography: Filters
Kodak 3x3" (75mm) 82 Color Conversion Wratten 2 Optical 1936111
🎈 Public Lab: Red Filter Rising
Telescope filters: a beginner's guide | BBC Sky at Night Magazine
Kson Wratten Filter Set Complete #15 #47 #82A #12 #ND96 #58 #25A #80A #21 #8 #23 | eBay
-1958-09-MP.jpg.742dbe8b5881c5a46c01b0cc5296ca6c.jpg "Make freckles stand out? - Black & White Practice - Photo.net")
Make freckles stand out? - Black & White Practice - Photo.net
Spectroscopic Analysis & Comparison of Planetary Filters - Eyepieces - Cloudy Nights
Filters: filters with Warren numbers vs filters rated in nm - Eyepieces - Cloudy Nights
Wratten filter specs
Rough equivalents to Wratten 44a?
Guides: Colour Filters To Improve Lunar and Planetary Visual Observing | First Light Optics
ZoneView: preview framing/filter hack – Stearman Press LLC
