M51 and companions - C11 Edge + Hyperstar

[Sedat]

Hi again,

This Pixinsight is incredible indeed. This time the calibration and stacking is done with Images Plus.




Scope: C11 Edge HD f/10 @ f/2 with Hyperstar 3
Mount: Vixen New Atlux with Starbook
Focuser: Feathertouch Microfocuser
Camera: Canon 550D - Hutech modified
Filters: CLS
Guide: Celestron 9x50 Finder/Guider, Orion SSAG

Exposures: 24x150 second Light @ISO800, 50x Darks, 50 Bias, 50 Flats
Shooting Date/Time 03.07.2011 00:17:20
Orientation:
Acquisition: BackyardEOS
Guiding: PHD
Stacking: Pixinsight
Processing: Images Plus, Pixinsight, CS5
Location: Marmaris - Turkey

File Name   M51_LIGHT_150s_ISO800_+35cC_IDAS_1143stdev_000106.CR2
Camera Model   Canon EOS REBEL T2i
Firmware   Firmware Version 1.0.8
Shooting Date/Time   03.07.2011 00:17:20
Author   BILGEBAY
Owner's Name   
Shooting Mode   Manual Exposure
Tv( Shutter Speed )   150
Av( Aperture Value )   0.0
Metering Mode   Evaluative Metering
ISO Speed   800
Auto ISO Speed   OFF
Image Size   5184x3456

[pfile]

maybe on this one the color balance is a little weird, did you do ColorCalibration over the core of M51?

btw, your M101 shot is really nice.

[Sedat]

You are absolutely right. I didn't like it either.

Here is another try:



For color calibration I am selecting the whole of the galaxy, including the tidal tails etc. But then I am playing with the lower limit until only the galaxy is white and the rest is black.

I remembered seeing in Vicent's NGC1808 video that he doesn't touch these settings, neither for the white reference nor for the background reference image. So this time I did the same and I got better colors. Harry, on the other hand, is suggesting to play with these settings until we get a satisfactory mask for the calibration. Maybe version 1.7 is taking care of this and I don't need to touch anything.

What is he correct method ?

Thank you for your kind assistance.

Sedat

[Harry page]

Hi

You must include as much as the galaxy as possible , this often means you have to play with the settings  8)

Of course some times the default is right 

Harry