Filter Discussions & Tests

370 topics in this forum

1. Blocking Infrared Light with Copper Sulphate Solution.

   By colinbm, October 22, 2014   

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

2. When Infrared Is Not Invisible

   By OlDoinyo, December 4, 2014   

   • Filters
   • Infrared
   • 1 reply
   • 1.4k views
   • 
   • colinbm
   • December 4, 2014

3. Transmission data for Wratten Filters

   By rfcurry, November 2, 2014   

   • Filters
   • 2 replies
   • 1.2k views
   • 
   • colinbm
   • November 3, 2014

4. Anybody Know this Filter Please ?

   By colinbm, October 28, 2014   

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

5. Is there one size that fits all?

   By rfcurry, October 21, 2014   

   • Filters
   • 11 replies
   • 2.9k views
   • 
   • rfcurry
   • October 25, 2014

6. UV/visible filter stack

   By nfoto, September 30, 2014   

   • Filters
   • 6 replies
   • 2.4k views
   • 
   • Andrea B.
   • October 1, 2014

7. UG5 test: how do I get that nice green?

   By msubees, August 24, 2014   

   • Filters
   • 13 replies
   • 2.8k views
   • 
   • Andrea B.
   • September 5, 2014

8. Where does "red" come from?

   By enricosavazzi, August 16, 2014   

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

9. So, what does that Bayer filter really cost?

   By rfcurry, June 25, 2014   

   • Filters
   • 2 replies
   • 1.5k views
   • 
   • DaveO
   • June 26, 2014

10. UV Sparticle BandPass Filter Array

    By colinbm, May 22, 2014   

    • Filters
    • 22 replies
    • 6.1k views
    • 
    • JCDowdy
    • May 30, 2014

11. [Filter Test] 290BP10 UV-Pass

    By Andrea B., March 24, 2014   

    • Filters
    • 15 replies
    • 3.2k views
    • 
    • colinbm
    • March 25, 2014

12. Another Allamanda flower with a Violet Blue Cyan Green filter about 380nm to 530nm. 1 2

    By colinbm, December 14, 2013   

    • Filters
    • 26 replies
    • 5.3k views
    • 
    • Alaun
    • December 22, 2013

13. UV Allamanda Flower in Sunlight with AstroDon UVenus filter

    By colinbm, December 3, 2013   

    • Filters
    • 4 replies
    • 3.9k views
    • 
    • colinbm
    • December 14, 2013

14. Wanted - Andrea U 52mm filter Please ? 1 2

    By colinbm, December 8, 2013   

    • Filters
    • 26 replies
    • 4.3k views
    • 
    • Alaun
    • December 12, 2013

15. [Filter Test] Baader-U vs. Precision-U(old)

    By Andrea B., October 6, 2013   

    • Filters
    • 11 replies
    • 8.5k views
    • 
    • Alaun
    • October 28, 2013

16. Seeking advice for a novice UV Photographer

    By ahrneely, July 17, 2013   

    • Filters
    • 5 replies
    • 3.5k views
    • 
    • Andrea B.
    • July 23, 2013

17. [Filter Test] Baader-U, Hoya 340 + S8612, Hoya 360 + S8612, Precision-U (old)

    By Andrea B., July 19, 2013   

    • Filters
    • 0 replies
    • 3.7k views
    • 
    • Andrea B.
    • July 19, 2013

18. [Filter Test] Baader-U, B+W 403 + S8612, B+W 403 + BG39, Precision-U(old)

    By Andrea B., July 18, 2013   

    • Filters
    • 1 reply
    • 8.9k views
    • 
    • Nico
    • July 18, 2013

19. [Filter Test] 340AF15 UV-Pass

    By Andrea B., July 18, 2013   

    • Filters
    • 0 replies
    • 1k views
    • 
    • Andrea B.
    • July 18, 2013

20. Rusty Nut and Bolt - Precision U D300

    By Erik Lund, May 14, 2013   

    • Filters
    • Camera
    • 7 replies
    • 4k views
    • 
    • nfoto
    • May 15, 2013