Filter Discussions & Tests

370 topics in this forum

1. Another way to rear-mount filters

   By bvf, April 3, 2021   

   • Filters
   • 13 replies
   • 605 views
   • 
   • nfoto
   • April 7, 2021

2. Anybody Know this Filter Please ?

   By colinbm, October 28, 2014   

   • Filters
   • 14 replies
   • 3.5k views
   • 
   • Andrea B.
   • October 30, 2014

3. Anyone familiar with this filter?

   By JCDowdy, January 3, 2015   

   • Filters
   • 7 replies
   • 1.9k views
   • 
   • JCDowdy
   • January 3, 2015

4. Anyone own this filter? 1 2

   By Fandyus, April 24, 2021   

   • Filters
   • 29 replies
   • 877 views
   • 
   • Cadmium
   • April 25, 2021

5. AR coated QB21

   By aphalo, November 24, 2021   

   • Filters
   • White Balance
   • 7 replies
   • 612 views
   • 
   • KhanhDam
   • August 22, 2022

6. AR coating and UV?

   By Doug A, December 3, 2021   

   • Filters
   • 10 replies
   • 352 views
   • 
   • Doug A
   • January 16, 2022

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

   By rfcurry, October 31, 2018   

   • Filters
   • 48 replies
   • 5k views
   • 
   • Cadmium
   • November 21, 2018

8. Are there filter stacks that balance the light intensity of UV, vis, and IR?

   By Doug A, July 12, 2022   

   • Filters
   • 10 replies
   • 404 views
   • 
   • Doug A
   • July 17, 2022

9. Are UV filters useless at blocking UV? Tune in to find out! 1 2

   By ultrainfra, October 30, 2020   

   • Filters
   • 26 replies
   • 2k views
   • 
   • otoien
   • November 6, 2020

10. Asahi 253.7 UAT Filter - Very Leaky

    By Andrea B., March 11, 2015   

    • Filters
    • 12 replies
    • 3.5k views
    • 
    • JCDowdy
    • March 13, 2015

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

    By lost cat, December 2, 2015   

    • Filters
    • 40 replies
    • 8.9k views
    • 
    • Andrea B.
    • December 18, 2015

12. Astronomy Filter Sizes and Adapters

    By enricosavazzi, September 10, 2015   

    • Filters
    • 7 replies
    • 4.6k views
    • 
    • enricosavazzi
    • October 9, 2015

13. B+W Equivalencies and B+W Catalog Links

    By Cadmium, January 4, 2020   

    • Filters
    • 15 replies
    • 716 views
    • 
    • dabateman
    • January 6, 2020

14. B+W Filter Designations

    By Shane, June 1, 2021   

    • Filters
    • 10 replies
    • 1.7k views
    • 
    • Shane
    • June 21, 2021

15. Baader U and Invisible Vision 308nm filter comparison for skin imaging 1 2

    By JMC, August 16, 2017   

    • Filters
    • 35 replies
    • 4.8k views
    • 
    • lukaszgryglicki
    • August 30, 2022

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

    By Cadmium, January 9, 2016   

    • Filters
    • 40 replies
    • 15.1k views
    • 
    • Cadmium
    • February 13, 2016

17. BaaderU Raw Color with Nikon D600 and Panasonic S1R: Geez!! (Update: Edmond 340BP10) 1 2

    By Andrea B., May 1, 2022   

    • Filters
    • Camera
    • 33 replies
    • 1.1k views
    • 
    • dabateman
    • May 13, 2022

18. BaaderU, KolariU and UVBplus, ZWB1x8.0: Red Bluets

    By Andrea B., July 26, 2023   

    • Filters
    • 9 replies
    • 380 views
    • 
    • LarsHP
    • March 13

19. Barrier Filters: what are they and who needs them?

    By Pylon, July 10, 2015   

    • Filters
    • Fluorescence
    • 7 replies
    • 3.3k views
    • 
    • Andrea B.
    • July 15, 2015

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

    By Nisei, December 29, 2019   

    • Filters
    • Infrared
    • 38 replies
    • 4.7k views
    • 
    • Nisei
    • January 11, 2020

21. Best way to construct a filter 1 2

    By motorhead9999, May 8, 2020   

    • Filters
    • 28 replies
    • 1.5k views
    • 
    • dabateman
    • May 13, 2020

22. BG24A stack

    By Cadmium, May 7, 2016   

    • Filters
    • 5 replies
    • 2.4k views
    • 
    • Cadmium
    • May 12, 2016

23. Blocking Infrared Light with Copper Sulphate Solution.

    By colinbm, October 22, 2014   

    • Filters
    • 8 replies
    • 5.5k views
    • 
    • colinbm
    • December 12, 2014

24. Bokeh striations in ZWB2

    By Ming, August 19, 2022   

    • Filters
    • 10 replies
    • 569 views
    • 
    • Andy Perrin
    • August 31, 2022

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

    By JMC, January 4, 2019   

    • Filters
    • 40 replies
    • 3.7k views
    • 
    • aphalo
    • January 14, 2019