Filter Discussions & Tests

370 topics in this forum

1. UV, Visible and IR filters test using Monochrome camera

   By JMC, November 17, 2017   

   • Filters
   • 17 replies
   • 2.5k views
   • 
   • Alaun
   • November 20, 2017

2. [Filter test] LP1100nm

   By dabateman, September 17, 2018   

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

3. [filter test] 300Bp10

   By dabateman, October 12, 2018   

   • Filters
   • 17 replies
   • 1.9k views
   • 
   • dabateman
   • October 20, 2018

4. Unanswerable Question #273

   By Andrea B., December 10, 2021   

   • Filters
   • 17 replies
   • 427 views
   • 
   • Nate
   • December 13, 2021

5. [Filter Test] Blocking UV for Visible, Full-Spectrum Photos: Part #3 SUMMARY

   By Andrea B., December 16, 2021   

   • Filters
   • 17 replies
   • 1.1k views
   • 
   • Bill De Jager
   • December 23, 2021

6. Problems with small dichroic filter

   By Andy Perrin, April 12, 2016   

   • Filters
   • 17 replies
   • 4k views
   • 
   • Andrea B.
   • April 14, 2016

7. [Filter Test] Edmund Hard-coated 340/10 Test #5: Sunflower, Sun

   By Andrea B., June 13, 2018   

   • Filters
   • 16 replies
   • 2.7k views
   • 
   • dabateman
   • July 17, 2018

8. Suggestions for narrow-pass filter

   By Bill De Jager, January 14, 2017   

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

9. IDAS 1.25" UV-pass filter

   By enricosavazzi, May 13, 2020   

   • Filters
   • 16 replies
   • 1k views
   • 
   • colinbm
   • May 18, 2020

10. Trying to Prevent Filter Glass Oxidation #2

    By Andrea B., June 23, 2020   

    • Filters
    • 16 replies
    • 1.1k views
    • 
    • Andrea B.
    • July 8, 2020

11. Kolari UV bandpass in front of lens or behind?

    By moondigger, December 18, 2023
    • 16 replies
    • 508 views
    • 
    • DonPilou
    • December 20, 2023

12. First Experimental UV Kit Questions

    By djt, March 4, 2016   

    • Filters
    • 16 replies
    • 3.9k views
    • 
    • djt
    • March 10, 2016

13. Thinking about Andrea U mkII filter

    By Doug A, November 29, 2021   

    • Filters
    • 16 replies
    • 654 views
    • 
    • Andy Perrin
    • December 1, 2021

14. An old Kodak Wratten 18a filter

    By JMC, August 30, 2021   

    • Filters
    • 16 replies
    • 777 views
    • 
    • JMC
    • September 3, 2021

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

    By Cadmium, January 4, 2020   

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

16. Schott S8612 coated vs uncoated test

    By Cadmium, November 26, 2020   

    • Filters
    • 15 replies
    • 1.2k views
    • 
    • Cadmium
    • February 7, 2021

17. [Filter Test] 340/10 #1 Gotta work out a problem or two, but here is a 340/10 result anyway

    By Andrea B., August 21, 2016   

    • Filters
    • 15 replies
    • 5.1k views
    • 
    • Cadmium
    • August 23, 2016

18. [Filter Test] AndreaU-MkII, BaaderU, Hoya U340 x 4.00 mm: Raw Colors

    By Andrea B., August 9, 2021   

    • Filters
    • 15 replies
    • 401 views
    • 
    • Andrea B.
    • August 10, 2021

19. uv/ir cut filter for rookie

    By dancingcat, November 24, 2021   

    • Filters
    • 15 replies
    • 504 views
    • 
    • Andy Perrin
    • November 27, 2021

20. Spring test of the lenses with new Tangsinuo filters

    By photoni, April 13, 2022   

    • Lens
    • Filters
    • 15 replies
    • 451 views
    • 
    • Andy Perrin
    • June 21, 2022

21. [Filter Test] 290BP10 UV-Pass

    By Andrea B., March 24, 2014   

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

22. Question about Kolari Filter Test

    By Andrea B., June 4, 2017   

    • Filters
    • 15 replies
    • 3k views
    • 
    • DonPilou
    • June 8, 2017

23. Hrommagicus IR Filter - Field Test

    By eye4invisible, October 19, 2019   

    • Filters
    • Aerochrome
    • 15 replies
    • 1.4k views
    • 
    • yann_p
    • May 17, 2020

24. Omega eBay store is gone

    By Andy Perrin, September 6, 2020   

    • Filters
    • 14 replies
    • 1.1k views
    • 
    • Cadmium
    • September 9, 2020

25. KolariU + Nikon 50/1.8 AIS

    By Andrea B., May 28, 2021   

    • Filters
    • Lens
    • 14 replies
    • 416 views
    • 
    • Andy Perrin
    • May 30, 2021