I am still agonizing about whether I bought the best LP filter for AP using my modded Canon XS.
Local LP sodium lights are my bug bear .
I bought the Baader Moon/skyglow Neodymium on recommendations and after extensive research.
Now I learn that the CLS filter may have been a better choice. I have seen that many reviewers are calling the Baader a "mild' filter and the CLS a "medium", and the narrow bands a "strong", of course.
As far as I can determine, looking at the transmission curves, both are very similar. They both cut out the low pressure sodium between 550 and 600 nm which is where all of my LP is.
The only major difference is that the Baader passes around 50 % at 530 nm while the CLS does not. I do not see any line at this wavelength included in LP that I should worry about. Hg at 546 nm is mostly passed but Hg is not part of my local LP.
So-what really determines what is a mild versus a medium LP filter? Does the Hg pass make the Baader a mild? Also I note that another Hg line at 435 nm is a borderline cut with the CLS but total cut with the Baader.
Is this a case of six of one and half a dozen of the other?
The proof will come when I am able to collapse the wave function of photons under a clear and warm sky, whenever that may be....
What's the skinny here?