Filter Discussions & Tests

370 topics in this forum

1. Filters and Fog

   By Andrea B., July 20, 2015   

   • Filters
   • 4 replies
   • 2.2k views
   • 
   • JCDowdy
   • July 21, 2015

2. Suggestions for narrow-pass filter

   By Bill De Jager, January 14, 2017   

   • Filters
   • 16 replies
   • 2.2k views
   • 
   • Andrea B.
   • January 23, 2017

3. Where does "red" come from?

   By enricosavazzi, August 16, 2014   

   • Filters
   • 3 replies
   • 2.2k views
   • 
   • Andrea B.
   • August 16, 2014

4. [Filter Test] 340/10 #4 Edmund Hard-coated 340/10 Rear-mount Experiment

   By Andrea B., June 10, 2018   

   • Filters
   • 18 replies
   • 2.2k views
   • 
   • Cadmium
   • June 12, 2018

5. RGB Stacking within the UV Waveband

   By Cadmium, June 1, 2018   

   • Filters
   • TriColour
   • 12 replies
   • 2.1k views
   • 
   • colinbm
   • June 3, 2018

6. Hoya B-410 Red Blocker to Emulate EIR: Photo Ninja Tutorial

   By Andrea B., August 17, 2017   

   • Filters
   • 4 replies
   • 2.1k views
   • 
   • Andrea B.
   • August 20, 2017

7. [Filter test] LP1100nm

   By dabateman, September 17, 2018   

   • Filters
   • Infrared
   • 17 replies
   • 2.1k views
   • 
   • Andrea B.
   • September 23, 2018

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

   By Nisei, March 19, 2020   

   • Filters
   • 36 replies
   • 2.1k views
   • 
   • Andrea B.
   • March 25, 2020

9. What ionic filter stack is closest to Baader U performance?

   By Doug A, October 13, 2021   

   • Filters
   • 9 replies
   • 2k views
   • 
   • ulf
   • October 16, 2021

10. [Filter Test] StraightEdgeU (v2016) vs. the Others: Scarecrow Garden Scene

    By Andrea B., August 26, 2016   

    • Filters
    • 2 replies
    • 2k views
    • 
    • Andrea B.
    • August 26, 2016

11. [Filter Test] AndreaU Mk-I, AndreaU Mk-II, BaaderU, Hoya U360 Stack on a 35/3.5 1 2

    By Andrea B., December 1, 2021   

    • Filters
    • 33 replies
    • 2k views
    • 
    • ulf
    • December 12, 2021

12. [Filter Test] AndreaU UV-Pass

    By Andrea B., May 3, 2015   

    • Filters
    • 0 replies
    • 2k views
    • 
    • Andrea B.
    • May 3, 2015

13. Sick S8612 1 2

    By colinbm, June 21, 2020   

    • Filters
    • 30 replies
    • 2k views
    • 
    • colinbm
    • June 28, 2020

14. [Filter Test] AndreaU MK-II, BaaderU, Hoya U360 Stack, StraightEdgeU (v2016) :: Bouquet in Raw False Colours and in WB

    By Andrea B., September 16, 2016   

    • Filters
    • 2 replies
    • 2k views
    • 
    • Andrea B.
    • September 17, 2016

15. 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

16. The shape of things to come

    By Cadmium, November 21, 2017   

    • Filters
    • 11 replies
    • 2k views
    • 
    • OlDoinyo
    • February 2, 2018

17. Cleaning of some UV Filters.

    By colinbm, May 24, 2015   

    • Filters
    • 7 replies
    • 1.9k views
    • 
    • JCDowdy
    • May 25, 2015

18. [Filter Test] AndreaU MK-II, BaaderU, Hoya U360 Stack, StaightEdgeU (v2016): Standards & CC Passport

    By Andrea B., September 17, 2016   

    • Filters
    • 6 replies
    • 1.9k views
    • 
    • Andrea B.
    • September 19, 2016

19. Surplus - Bandpass Filters, Andover Optics

    By colinbm, October 21, 2015   

    • Filters
    • 5 replies
    • 1.9k views
    • 
    • igoriginal
    • October 22, 2015

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

    By colinbm, July 2, 2020   

    • Filters
    • TriColour
    • 41 replies
    • 1.9k views
    • 
    • colinbm
    • July 8, 2020

21. Ebay find - Schott OG570 in 52mm filter

    By JMC, September 20, 2017   

    • Filters
    • 7 replies
    • 1.9k views
    • 
    • JMC
    • October 6, 2017

22. Russian Lomo UV filters transmission (3mm and 5mm) 1 2

    By JMC, September 24, 2020   

    • Filters
    • 32 replies
    • 1.9k views
    • 
    • diant
    • August 22, 2021

23. Rain-X changes a filter's transmission 1 2

    By ulf, July 23, 2020   

    • Filters
    • 36 replies
    • 1.9k views
    • 
    • colinbm
    • December 5, 2021

24. [Filter Test SEU Gen2 #11] A Fascinating New Rudbeckian View

    By Andrea B., July 25, 2018   

    • Filters
    • 11 replies
    • 1.9k views
    • 
    • Andrea B.
    • July 30, 2018

25. Anyone familiar with this filter?

    By JCDowdy, January 3, 2015   

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