On a breezy night thought I would try the Trapezium stars and bright gas in the centre of M42 at half a sec exposure helping to cut through seeing and breeze. Short exposures with this sensitive CCD usually used as a guidecam mean no guiding. At only 8bits it is still capable at extracting decent detail.
Registax selects the sharpest images so I can remove any wind damaged or recentred star movement images from the sharpest. The UHC filter gives better detail and contrast compared to the luminance filter and has similar detail compared with the Ha filter but is much brighter.
Thought I would align a HST downsized image to compare the detail - HST image is the second one, just flick from my first one to the other (HST) for blink detail. The lower left detail around the bright star and down the red wall looks best in my image in comparison.
UHC-3000x0.5sec
RGB-500c0.5sec.
Thanks for looking, John.
Last edited by John Hothersall; 11-12-2013 at 06:31 PM.
Is that the bow shock we can see in your image as well (bottom right)? Fantastic!
H
I noticed the bow shock bottom right too which is clear in the HST image, and my image shows only a faint hint. I may try trapezium again at a longer FL if breeze is present to get more detail.
It is really great result that you have done . I like always what you do and it is very iteresting to learn differents ways.
But I didn't knew that we can use Registax for the deep sky.
Franck
FANTASTIC John! Really a lovely closeup, now please don't remove the camera from the focuser 'till next fall that I want to see a similar close up of the keyhole as well
