Filter Discussions & Tests

370 topics in this forum

1. 1.25” Eyepiece Filters Can Fit Some Olympus µ4/3 Bodies

   By JCDowdy, October 9, 2015   

   • Filters
   • 3 replies
   • 1.7k views
   • 
   • colinbm
   • October 10, 2015

2. Astronomy Filter Sizes and Adapters

   By enricosavazzi, September 10, 2015   

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

3. PrimaLuceLab U filter

   By enricosavazzi, August 20, 2015   

   • Filters
   • 6 replies
   • 2.7k views
   • 
   • enricosavazzi
   • September 3, 2015

4. [Filter Test] Hoya U330 as a Dual Bandpass Filter

   By Andrea B., July 27, 2015   

   • Filters
   • 0 replies
   • 994 views
   • 
   • Andrea B.
   • July 27, 2015

5. [Filter Test] Schott UG5 + S8612 Stack with and without UV-flash

   By Andrea B., July 26, 2015   

   • Filters
   • Insect.Animal Vision
   • 5 replies
   • 1.9k views
   • 
   • Andrea B.
   • July 27, 2015

6. [Filter Test] Schott BG3 Dual Bandpass, Blue and IR

   By Andrea B., July 23, 2015   

   • Infrared
   • Filters
   • 2 replies
   • 1.2k views
   • 
   • Andrea B.
   • July 24, 2015

7. Filters and Fog

   By Andrea B., July 20, 2015   

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

8. Clear UV-Blocking filters aren't really uv-blocking filters...

   By Pylon, July 19, 2015   

   • Filters
   • 4 replies
   • 1.5k views
   • 
   • nfoto
   • July 19, 2015

9. 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

10. Optical density has its limits

    By rfcurry, May 13, 2015   

    • Filters
    • 23 replies
    • 5.8k views
    • 
    • rfcurry
    • July 8, 2015

11. [Filter Test] CopperU: An Unusual UV-Pass Filter

    By Andrea B., June 23, 2015   

    • Filters
    • 3 replies
    • 1.8k views
    • 
    • Andrea B.
    • June 23, 2015

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

    By Andrea B., April 1, 2015   

    • Filters
    • 41 replies
    • 15.3k views
    • 
    • Andrea B.
    • June 4, 2015

13. Cleaning of some UV Filters.

    By colinbm, May 24, 2015   

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

14. [Filter Test] AndreaU, BaaderU, PrecisionU with UV-Flash & S8612

    By Andrea B., May 17, 2015   

    • Filters
    • 7 replies
    • 3.9k views
    • 
    • colinbm
    • May 20, 2015

15. [Filter Test] BaaderU UV-Pass

    By Andrea B., May 3, 2015   

    • Filters
    • 6 replies
    • 3.3k views
    • 
    • Andrea B.
    • May 13, 2015

16. [Filter Test] AndreaU UV-Pass

    By Andrea B., May 3, 2015   

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

17. [Filter Test] Hoya U340 with S8612, BG40 and BG39

    By Andrea B., April 13, 2015   

    • Filters
    • 17 replies
    • 10.9k views
    • 
    • Andrea B.
    • April 15, 2015

18. Help Needed: Filter Mounting on Steinheil Lens

    By OlDoinyo, January 22, 2015   

    • Filters
    • 21 replies
    • 5.1k views
    • 
    • JCDowdy
    • April 14, 2015

19. [Filter Test] 340AF15 Strange Results

    By Andrea B., April 12, 2015   

    • Filters
    • 11 replies
    • 2.3k views
    • 
    • Andrea B.
    • April 13, 2015

20. Photos with Various Schott & Hoya Filters :: K5 + UAT85/4.5

    By Andrea B., April 7, 2015   

    • Filters
    • 13 replies
    • 3.7k views
    • 
    • Andrea B.
    • April 11, 2015

21. Rites of Spring: UV filter shootout with Tussilago

    By nfoto, March 28, 2015   

    • Filters
    • 4 replies
    • 3k views
    • 
    • nfoto
    • March 29, 2015

22. Asahi 253.7 UAT Filter - Very Leaky

    By Andrea B., March 11, 2015   

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

23. Lens Clamp Filter Holder Experiment

    By Andrea B., February 12, 2015   

    • Filters
    • 9 replies
    • 3.6k views
    • 
    • JCDowdy
    • February 13, 2015

24. Anyone familiar with this filter?

    By JCDowdy, January 3, 2015   

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

25. A new UV Bandpass filter

    By rfcurry, November 12, 2014   

    • Filters
    • 19 replies
    • 4.8k views
    • 
    • nfoto
    • December 13, 2014