AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.
I agreeDates:April 22, 2020
Frames:
Baader Planetarium G 2": 44x300" bin 1x1
Baader Planetarium R 2": 44x300" bin 1x1
Baader Planetarium R 2": 44x300" -25C bin 1x1
Integration: 11.0 hours
Avg. Moon age: 28.98 days
Avg. Moon phase: 0.34%
Bortle Dark-Sky Scale: 7.00
Mean SQM: 17.50
Astrometry.net job: 3454874
RA center: 14h 3' 11"
DEC center: +54° 21' 32"
Pixel scale: 0.513 arcsec/pixel
Orientation: 269.776 degrees
Field radius: 0.390 degrees
Resolution: 4368x3294
Locations: Castenedolo, Castenedolo, Italy
Data source: Backyard
As for my previous picture of M99
the imaging session of this M101 was intended to test the latest gradient correction technique by Vicent Peris.
(the link to the original article can be found in the description of my M99 image)
M99 was a small target: the gradient correction is quite easy, so the idea was to test it on a larger target.
Here the reason why I choose M101.
IMHO this technique is going to be a MUST for city imagers
In version B you can see a direct comparison between original and corrected image
In version C you can see the large field image used for gradient modeling.
I took it with a Canon 60D at 800 ISO and an Letiz Elamrit - R 180 mm F 2.8 at F/4
140 x 20 sec subs.
Description: The reference image from the Canon 60D with the 180 mm lens used as a reference for the gradient modeling.
| Imagers of Italy |
| Moravian Users |
| PixInsight Addicts |
Comments