Jump to content


My take on M31

Recommended Posts

Taken on January 30.

Camera & settings:

Pentax K20D with 135 mm f/3.5 lens at f/5.6, ISO 1600 21 * 240 sec exposures, bias frames and flat frames (from the night before)

Mount: Skywatcher EQ3 Pro

Software: PixInsight

Usually the air is very dry during the winter, but not on this occasion. We'd had mild weather with lots of moisture in the air. In this case, I think it worked in my favour.

BTW, I didn't dither between frames, and I couldn't completely get rid of the streaks from hot pixels.


Link to comment
Share on other sites

  • 3 weeks later...

When using a short focal length, polar alignment becomes less critical. In this case I used the markers in the polar scope eyepiece for alignment. After doing a 3 star alignment on my Synscan I sometimes also do a polar alignment using the synscan routine. But that isn't really necessary for these "wide field" images.

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • 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.