Quote:
Originally Posted by Stonius
That definitely looks like expansion to me. You always come up with the most jaw-dropping images, John. I take my hat off to you, I'm more than a little jealous of your amazing astrophotography skills.
I hope you'll permit me one little criticism - I'm pretty sure the eyes on the 3D version are back to front for cross-eyed viewing (I assume you want the humunculus to bulge outward, toward the viewer?).
Cheers and thank you for sharing your amazing work!!
Markus
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Thanks Marcus, Kal's link shows a suprising expansion over a short time, I thought it would be slower.
The 3D image sticks out to me, there must be something going on in my brain? I could reverse the images to see if that makes a difference because others could see similar indent.
Quote:
Originally Posted by John K
This type of planetary type deep sky imaging project has been on my tick list for a long time John!
You have just inspired me to try it.
Great work!
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Thank John, planetary skills are of occasional use in deep space, you need good collimation. I did try double the FL but the stars would not keep still in the image although it still could be done in way above avg conditions.
Quote:
Originally Posted by Peter Ward
Not wanting to rain on your parade John, but the comparative data has me puzzled. The field stars in the newer image are bigger (less resolved? ) than
the older image, yet Eta itself is smaller. Selective processing perhaps?
I'd tried and failed in a similar effort with my PGR camera some years back...That said I've suspected it was only a matter of time before camera technology would allow lucky imaging techniques to be applied to brighter deep sky objects.
...kudos to you for trail blazing a successful pathway!
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Thanks Peter, my old 8Bit ccd a Mintron 12v6hc same as GStarEx (icx429ALL) has about 8.5e noise at 0 degrees temp and near to 15e at 30+ degrees temp while the ASI290 has 1e noise. Such a difference in quality, the sensitivity especially in the dark layers when 16bit bin averaging which my old ccd could not do. Overall is 2-3x more sensitive. The PGR grasshopper IMX252 is a little better than the ASI290 but 2.5x the price.
The selective processing I used was using the 7nm Ha eta which was a shade smaller than the RGB low gain eta, I used the higher gain for outer detail. The stars are blue in ASI image but a washed out yellow in the Mintron image not sure why this is? My collimation was not as good in old image.
Thanks everyone for your kind words, I was shocked by the amount of detail the ASI caught so I can't wait for core of Lagoon and Triffid as well as the Eagle pillars.
I have Einstein's Cross labeled in the Spring but this may be taking it too far?
Regards, John.