Starna UV Visible Wavelength Reference Filters - Holmium & Didymium Glass
Shimadzu 202-30242 Didymium Glass Calibration Filter | BMI Surplus
Light Pollution Filters
Schneider 4x5.65" Enhancing Water-White Glass Filter 68-100056
Didymium Calibration Filters - Galvoptics
Didymium Camera Filters | DidyClips
D50mm Optical Filter Didymium Glass PNB586 BG20 window - AliExpress
Hoya 77mm RA54 Red Enhancer, Color Intensifier Filter — Glazer's Camera
Didymium Light Pollution Filter – Move-Shoot-Move Rotator
Amazon.com : Hoya 58mm Red Starscape Glass Filter : Camera Lens Filter Sets : Electronics
Richard Drumm The Astronomy Bum: Didymium filter fol-de-rol!
WAV-7 UV/VIS Wavelength & UV Didymium Photometric Accuracy Standard (329-875nm) — FireflySci Cuvette Shop
50pcs total diameter 51mm and 2mm thick Didymium filter glass PNB586 - AliExpress
Amazon.com : Kase Clip-in Neutral Night Light Pollution Didymium Filter Dedicated for Fujifilm GFX 50R / GFX 50S / GFX 100 / GFX 100S Fuji Camera : Electronics
Amazon.com : ICE Magco 82mm MC Slim Magnetic LiPo Filter Didymium Broadband Light Pollution Reduction Optical Glass Incl Adapter : Electronics
lighting - How can I reduce the effect of sodium vapor street lights in night photography? - Photography Stack Exchange
Azzota Corp Didymium Oxide Filter Spectrophotometer Calibration Tools Use | Fisher Scientific
Didymium liquid filter
Didymium glass filter
Motic Didymium filter, Ø 45mm (BA310, BA410, AE31)
Didymium Reference for Wavelength in the Visible and UV
