I have a couple of questions for the community regarding images I took with my ASI294MC Pro and L-Extreme filter. I've read that the 294 doesn't do that well with HA.
I've attached the image which is a stack of 50 light frames taken at gain 121, offset 30 and 180sec each. No calibration frames have been added (yet).
My questions are:
1. Is the haloing around the two brightest stars normal with this filter?
2. There's what looks like HA nebulosity on the left hand side of the image. Is this normal?
Apologies for the basic questions but I've only used a LPR filter up to now, so am finding my way with this new filter.
I did a quick search and apparently it’s due to the Oiii channel (which makes sense as it has a teal colour to it). Apparently it can be processed out of the images. If I split the channels I don’t see it in Ha.
Quote:
Originally Posted by multiweb
1- could be a reflection on your camera window. Increasing the spacing between filter and chip can help
2- although it's uncalibrated the nebulosity and dark patch look legit.
The haloing is from the focus not quiet there, I had the same problem when I got my L-extreme and didn't work it out till processing.
As I can see in your sig you use a foucuscube2 as I do, since I've gotten it all haloing issues have gone.
I'm not sure on what capturing program you use but for the moment I'm using NINA with great results, my auto focus numbers for it are as follows, hope this helps.
The haloing is from the focus not quiet there, I had the same problem when I got my L-extreme and didn't work it out till processing.
As I can see in your sig you use a foucuscube2 as I do, since I've gotten it all haloing issues have gone.
I'm not sure on what capturing program you use but for the moment I'm using NINA with great results, my auto focus numbers for it are as follows, hope this helps.
Karl
Hi,
I don’t think it’s my focussing. As you said I’m using the Pegasus Focus Cube 2. I use KStars and usually do 2 auto-focus routines (it’s recommended) before imaging so I’m pretty sure my focussing is as good as it can be.
It's in my images (80ED) with this filter.
I don't mind the halos. It's like star crosses for me. Personal preference
Maybe one day I'll learn how to remove them, but it looks okay.