Jump to content

sgl_imaging_challenge_banner_31.thumb.jpg.b7a41d6a0fa4e315f57ea3e240acf140.jpg

ASI 178MM and ASI 183MM fixed pattern noise?


Recommended Posts

Have any users had issues with FPN with these cameras?

There’s a lengthy thread over on CN. Just google for sample images.

I returned an ASI 183MM and replaced it with an ASI 1600 for my solar imaging.

Looks like the ASI 178MM has the same issues.

Any comment/ feedback??

Link to post
Share on other sites

I'm trying to find the thread you are referring to - but failing.

Not sure what issues with FPN are you having?

I experienced both PRNU and Telegraph type noise with my ASI1600.

I also have ASI178mc cooled version. What should I be looking at? Looking at master dark from this camera - there are vertical and horizontal bands - but I did not notice those in final images - I guess those calibrate out?

image.png.79a612e4399e5d959abe7275c15ddbae.png

That is my master dark binned x6 and insanely stretched.

 

Link to post
Share on other sites

Ah yes, I have that on my ASI1600 as well.

I did not notice that on my ASI178 because I did not do narrowband imaging with it and it is color sensor so it will have bayer matrix anyway - but it is there on ASI1600 as well.

For DSO imaging - it can easily be solved with flats. Here is 1600% (nearest neighbor resampling) zoom of my master flat for Ha (DSO kind - not solar):

image.png.4336aa8d0017e72202a99c609e77e58b.png

Can't you fix that with flats?

Link to post
Share on other sites
1 minute ago, Merlin66 said:

Vlaiv,

Getting good Ha narrowband flats for solar imaging is still a "black art"...............

Maybe you could just extract PRNU information with DSO Ha filter and flat panel?

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.