Re: Tackling Mars in IR - to pass or block?

Robert,
Maybe I'm ignorant about such things but just like in football I don't think you can "pass" and "block" at the same time. I guess the outcome is "unknown" if you stack an IR Pass filter on an IR Block filter.

Clear Skies
Weiman

One of my Red filters has IR blocking and the other does not. I find that the images with the non-blocked filter tends to burn out in high red areas like Aethiopis while the blocked filter does not. If I used the non-blocked filter I'd likely use it with a blocking filter.

Paul