I finally got the new etalon for my PST mod and as such was keen to try it out. Thankfully it has a tighter bandpass than the one i've been using given the finer detail that is visible. Based on images taken with isle of man solar scopes, which are 0.7a bandpass, I would estimate this is very close to that. Given that, I would also estimate my 'other' etalon is closer to 0.8a bandpass. I think I will be sticking with this one...
AR11499 is a nice active region that developed rapidly, giving out an M1 class flare a matter of hours before this image was taken, the remanants of it can be seen as the bright white areas in the image.
