Jump to content


Help with Artemis please?!


Recommended Posts

I had first light last night with my new 314L+ and got up and running very easily. The problem I had was after finishing a sequence I could not get anything to preview on screen when I wanted to swap targets. The camera was connected as I could see the countdown of the exposure.

I am sure it mst be something simple and obvious, any ideas?!

Oh, and how do you take flats?!



Edited by Johnboy2011
Link to comment
Share on other sites

Just to add when I ask how to take flats I mean specifically in Artemis. With the Canon I used APT which was pretty much an automatic function.

Personally I stick an A4 sheet of blank paper to my wardrobe doors, which are uniformly lit in sunlight during daytime. With that, I place just the OTA on a chair with the CCD camera in the focuser and with the same focus level, orientation and optical train (filters, etc) as when I was doing imaging the night before. The temperature is also set to be the same. I aim the telescope carefully at the A4 sheet of blank paper (green laser pointer helps) and fire away with a short-ish exposure of like 1 second. I check the FITS image in FITS Liberator and if the mean and median are about 20,000 (out of the 16-bit range), I keep it and take more of that exposure time. If the mean and median are way below or way above 20,000, I alter the exposure time accordingly and re-take a test shot. Once you have a sufficient number of these at about 20,000 mean and median (from 16-bit), you're sorted.

Link to comment
Share on other sites

You don't need to worry about temperature with flats.

Indeed. I only set mine to the same temperature as when imaging because I take my dark and bias images straight after the flats. I know that if I don't do it at the beginning, I'll forget! :p

Link to comment
Share on other sites

For flats I use an electroluminescent panel from earlsman about £20.As Gibb007 said use fitsliberator to get the adu around 20,000-24,000 mean for each filter.I use the sequence setting and when you have the exposure settings right you can save these sequence settings in artemis capture for next time.Next time you use the setting it may need tweaking a bit though.

Link to comment
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.