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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. Idea for temporary optical coupling liquid.

    By ulf,   
    • 12 replies
    • 792 views

  2. Transmission through thin (0.5mm) Hoya U-340 and U-360 filters 1 2 3 4 5

    By JMC,   
    • 106 replies
    • 4.2k views

  3. ND filters and long exposure test

    By StephanN,   
    • 6 replies
    • 1.7k views

  4. Kolari vision drop in & clip in filters for Canon EF/RS mount

    By Nemo Andrea,   
    • 1 reply
    • 422 views

  5. Omega eBay store is gone

    By Andy Perrin,   
    • 14 replies
    • 1.1k views

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

    By JMC,   
    • 43 replies
    • 2.3k views

  7. Three Different Filters, B+W486, KG3 & GRB3

    By colinbm,   
    • 22 replies
    • 1.8k views

  8. Spectrograph Study of a Rosco 74 Night Blue Filter

    By colinbm,   
    • 20 replies
    • 1.1k views

  9. Rosco 74 Night Blue 1 2

    By A Stranger In The Wind,   
    • 26 replies
    • 1.7k views

  10. Trying to Prevent Filter Glass Oxidation #2

    By Andrea B.,   
    • 16 replies
    • 1.1k views

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

    By colinbm,   
    • 41 replies
    • 1.9k views

  12. Coating Filters, Tests

    By colinbm,   
    • 9 replies
    • 834 views

  13. Sick S8612 1 2

    By colinbm,   
    • 30 replies
    • 2k views

  14. Lee 729 vs Lee 115

    By Nisei,   
    • 17 replies
    • 1.2k views

  15. Don't Forget about Filter Maintenance ! 1 2

    By Andrea B.,   
    • 33 replies
    • 2.9k views

  16. Filter wheel and Baader U size.

    By KaJashey,   
    • 13 replies
    • 713 views

  17. Kolari Vision UV redness 1 2 3

    By Nemo Andrea,   
    • 59 replies
    • 3.1k views

  18. New <300nm bandpass filter from Asahi with good IR blocking

    By JMC,   
    • 6 replies
    • 609 views

  19. IDAS 1.25" UV-pass filter

    By enricosavazzi,   
    • 16 replies
    • 1k views

  20. 729 summary

    By Cadmium,   
    • 4 replies
    • 853 views

  21. Hrommagicus IR Filter - Field Test

    By eye4invisible,   
    • 15 replies
    • 1.4k views

  22. Best way to construct a filter 1 2

    By motorhead9999,   
    • 28 replies
    • 1.5k views

  23. UVA and UVB polariser - Moxtek UVD260A 1 2

    By JMC,   
    • 35 replies
    • 3.7k views

  24. Some unusual UG filters. UK supplier, H V Skan 1 2 3

    By JMC,   
    • 59 replies
    • 2.7k views

  25. Which entry level filter for UV portraits? 1 2

    By Nisei,   
    • 36 replies
    • 2k views
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