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UltravioletPhotography

Filter Discussions & Tests

Discuss any filter: UV, IR, BG, UVIR-Cut, Dual Bandpass or whatever. Show us your tests of a filter.

370 topics in this forum

  1. Need help with filter problem UV/IR 1 2 3

    By StephanN,   
    • 53 replies
    • 2.8k views

  2. New Baader U flip question. 1 2 3

    By dancingcat,   
    • 53 replies
    • 1.3k views

  3. Lee 729 IR - West Green House garden 1 2

    By JMC,   
    • 49 replies
    • 2.7k views

  4. Are longpass filters useful for transmission testing? 1 2

    By rfcurry,   
    • 48 replies
    • 5k views

  5. [Filter Test SEU Gen2 #9A] Longpass Stack Wandering Discussion. See #9B for results. 1 2

    By Andrea B.,   
    • 43 replies
    • 5.5k views

  6. [Filter Test] 340/10 #6 Progress was made, finally. UPDATE: Progress was then lost. 1 2

    By Andrea B.,   
    • 43 replies
    • 1.2k views

  7. Testing Hoya U-340 and U-360 for visible leaks - funding request 1 2

    By JMC,   
    • 43 replies
    • 2.3k views

  8. How to do UV Induced Infrared Fluorescence 1 2

    By Doug A,   
    • 42 replies
    • 1.3k views

  9. I'll show you my Baader, if you show me yours. 1 2

    By dabateman,   
    • 42 replies
    • 2.5k views

  10. Optimal Thickness of S8612: Discussion 1 2

    By lukaszgryglicki,   
    • 42 replies
    • 1.7k views

  11. [Filter Test] Hoya U340 vs BaaderU :: crocuses in the wind 1 2

    By Andrea B.,   
    • 41 replies
    • 15.3k views

  12. New Tangsinuo filters - which to get? 1 2

    By Fandyus,   
    • 41 replies
    • 2.3k views

  13. Why Don't UV / Protection Filters Cut UV ? 1 2

    By colinbm,   
    • 41 replies
    • 1.9k views

  14. [Filter Test] Blocking UV for Visible Photos Made with Full-Spectrum Camera: Part #1 1 2

    By Andrea B.,   
    • 41 replies
    • 1.4k views

  15. Bold claim - Hitech ND filters and UV capability 1 2

    By JMC,   
    • 40 replies
    • 3.7k views

  16. Astrodon Sloan 1.25" U' filters - $100 closeout 1 2

    By lost cat,   
    • 40 replies
    • 8.9k views

  17. Baader U, U-360, UG11, ZWB1 stacks compared 1 2

    By Cadmium,   
    • 40 replies
    • 15.1k views

  18. Cerium oxide 1 2

    By Fandyus,   
    • 40 replies
    • 1.3k views

  19. Aerochrome color shifts SOOC with Foveon 1 2

    By Christoph,   
    • 40 replies
    • 1.3k views

  20. Discussion: UG5 + IR-Cut Filter Stack, Part 1 1 2

    By igoriginal,   
    • 39 replies
    • 10.4k views

  21. Best (affordable) alternative for B+W 099 filter? 1 2

    By Nisei,   
    • 38 replies
    • 4.7k views

  22. Accidental IR-filter, a bit like Aerochrome? 1 2

    By ulf,   
    • 38 replies
    • 8.3k views

  23. Kolarivision IR Chrome DIY Chinese version. 1 2

    By Marc del Piro,   
    • 37 replies
    • 5k views

  24. Very quick question - IR 1um+ filter recommendation 1 2

    By lukaszgryglicki,   
    • 37 replies
    • 982 views

  25. What filter for UV < 320 nm? 1 2

    By lukaszgryglicki,   
    • 37 replies
    • 737 views
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