Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

Altais

New software: Astrophotography Lab

Recommended Posts

Never mind, for some reason, after restarting the PC it worked!

Trying to unearth some bias file now and see how it goes :)

  • Like 1

Share this post


Link to post
Share on other sites

Just downloaded, I will try it out asap.

Many Thanks for your hard work.

Regards

  • Like 1

Share this post


Link to post
Share on other sites

Well, let me get this straight:

The program is telling me that it makes no difference doing my frames at ISO 400 or ISO 1600 (Canon Xs). The SNR will be the same and the simulated image shows he same result.

Is that right, really?

Share this post


Link to post
Share on other sites

Seems an excellent and very useful program Lars. I'll give it a try and re-post .

Clear skies.

  • Like 1

Share this post


Link to post
Share on other sites

Well, let me get this straight:

The program is telling me that it makes no difference doing my frames at ISO 400 or ISO 1600 (Canon Xs). The SNR will be the same and the simulated image shows he same result.

Is that right, really?

Well, in terms of SNR, the only difference between ISO 400 and ISO 1600 is the difference in read noise. If the read noise isn't too different, then the SNR will not be that much affected.

There is, however, a significant difference in saturation capacity (something like a factor of 4), which will definitely affect your image. But this won't really show in the simulated image since it only has one signal level. The lower saturation capacity of ISO 1600 could mean that you would have to use a shorter exposure time to avoid unwanted saturation, which in turn would result in a lower SNR. So it does matter which ISO you use. You could generate a "Max stack SNR vs ISO" plot to get a better idea of how the SNR will be affected, since this takes the difference in saturation capacity into account.

Sorry for the late reply.

Clear skies,

Lars

Share this post


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

By using this site, you agree to our Terms of Use.