NexStar AP Graduates Images and Discussions
Posted 04 February 2013 - 02:12 PM
Yes, it would be nice and indeed be somewhat of a technological advance for me, if I can produce, align and colour an Ha/Olll composite according to the Hubble Palette, but I fear the weather Gods are once again conspiring against us !
It's all a little like one English comedian once observed and Mushroom Bill, (Andy), brought recently to my attention.
He, (the comedian), apparently bought a lottery ticket with a secret time recorded on it predicting, according to chance, the exact moment Birmingham City Football (soccer) Club would score its second goal.
On opening the ticket it proclaimed "October" ! :rofl2:
Related to imaging, I know the feeling !
Opportunities are therefore still few and far between, but one positive aspect did emerge from my efforts.
Moving from an initial preview image of the Crab Nebula on my LT screen through a pure white light glass filter, I thought I might well have to refocus a tad when moving my filter wheel to the Ha filter position and thus incur significant delays necessitated by having to use a protracted exposure time to check.
Such however proved not to be the case: both the white light image and that provided by the Ha proved luckily to be parfocal !
I just hope that if I ever do get the opportunity to image in both Ha and Olll on the same night, the same applies !
Posted 05 February 2013 - 03:40 AM
I took no "Darks" or "Flats" to accompany the above image. I guess though, with the Atik 314L running, (at the time), at -23 Celsius, this camera is producing next to nothing in terms of "Noise". Thus, a great camera in its price range !
Posted 05 February 2013 - 07:40 AM
totally agree with you in regard to not taking darks with these Atik cameras as they are very low noise thanks to the cooling.In fact the fact sheet for these cameras does state that darks are unnessesary up to a given exposure time due to the cooling.
However, i do always take a few darks for one reason,possible hot pixels,i cannot speak of your Atik 314L, but both my old Atik 16ic mono, and my current Atik 314E mono, do sometimes suffer from the odd hot pixel or two, mainly in the summer months when nights are warmer and the cooling has to work harder to cool the sensor. So for that reason alone, i always take a few darks, winter and summer, just in case.
Another thing i do, is to leave the Atik powered up and running for about 30 minutes or so before attaching to the scope,this allows the time for desired cooling temps to be reached before imaging.
Posted 05 February 2013 - 08:25 AM
All you say is quite true and I was probably lucky in this case not to have had to take any darks. This, I attribute to the fact that the ambient temperature was not much above freezing on the night, hence the cooling fan of the camera giving such a low figure.
Come the Summer, (that's of course the British Summer where only the rain gets warmer), and I may well experience one or two hot pixels as a result of lesser cooling.
And yes, I also allow the Atik to cool for a period of time until the camera's temperature shows a steady reading at the bottom of the "Nebulosity 2" progran page.
Posted 06 February 2013 - 06:33 AM
Uggs, excellent and amazing M42.
Tel, excellent attempt and well processed given your location, hats off.
Posted 06 February 2013 - 09:32 PM
Tel, the detail in that M1 is absolutely staggering!
Posted 09 February 2013 - 12:14 AM
Last night I had a rare excellent seeing session. I was imaging Jupiter and by chance caught Io just starting a transit.
I was using all Celestron gear , 8Se scope , CG-5 mount , neximage camera , even a Celestron 2 times barlow.
Look in the upper right to see Io. I will reprocess the video to even out the contrast later.
Link to my video of the orbital motion..
Posted 10 February 2013 - 04:39 AM
I note you used a Neximage camera but was that the old version or the new(er) Neximage 5 ?
Posted 10 February 2013 - 10:07 AM
The Neximage camera is the old original version camera. In regards to the detail on the video it was plain old luck as the seeing conditions were superb and that happens so rarely where I live.
Posted 10 February 2013 - 01:25 PM
Weather/seeing conditions ?
In the main, weeks' long wall to wall cloud cover over here ! Hardly conducive of good imaging !
Oh hum !
Posted 21 February 2013 - 09:33 PM
Posted 22 February 2013 - 04:10 AM
Plenty of dust lane detail there and the outer "arms" well captured ! :bow:
Posted 22 February 2013 - 05:57 AM
Posted 22 February 2013 - 07:51 AM
The Devil and idle hands seem to be a good combo Tel. Great enhancement of Milby's image.
Thanks for posting guys.
Posted 22 February 2013 - 09:40 AM
And talking of idle hands, please allow me to vent my frustration, its been months since i`ve got any imaging done,(stupid UK weather), i had been hoping to shoot my Nemesis this winter after a rather poor attempt last year.
Finally got my chance a few nights back,however the H/H is always problematic for my viewing aspect, i only get about an hour to capture it before i lose the guide star to the apex of my obs roof.
In the end sadly, i was only able to get 5X10 minute subs+ a single dark frame, which just is not enough on this target in mono Ha, the resulting image after processing came out devoid of any fine detail, the only thing i can say is that i finally bagged it.
First this small image, which has been resized and then binned 2X2, mainly to my eyes it cleans up the image somewhat.
second image, is from my first process and cropped because i did not have time to centre the H/H given the issue of time on the object.
Not good images i agree, but it was nice to get out in the obs for a while after such a long break from imaging.
Posted 22 February 2013 - 10:31 AM
In spite of the problems you had, I find it quite pleasing to look at, almost ghostly in a nice sort of way. The Head itself has nice soft edges and looks as though it is enveloped in a heavenly mist.
Thanks for posting.
Posted 22 February 2013 - 04:12 PM
Cold and gray again so I'm chipping away at this M81. Changed up with linear-level deconvolution using an image-specific PSF, which made more of a difference than I thought it would.
Posted 22 February 2013 - 04:25 PM
Milby, simply excellent resolution on M81. Very detailed. To my eyes there seems to be a bit of a yellow cast to the image. Horses for courses of course.
Posted 23 February 2013 - 08:05 AM
Milby, yes thats a better rendition than your first attempt you posted earlier, the processing looks very good and more finer detail in the dust lanes is more obvious.Nice one.
Posted 23 February 2013 - 06:04 PM
That is one of the most detailed M81 images I've seen. Near Hubble quality I'd say!
Posted 03 March 2013 - 10:34 AM
Tel, Milby, Haytor, you guys have been taking some great photos. I've been stalking ya'll since last year! I wanted to post one I just did with my new rig. Figured you guys would enjoy it
Posted 03 March 2013 - 03:35 PM
Many thanks for your kind words regarding my imaging but here you have an absolute "stunner" to complement the rest of your admirable collection in "Astrobin" which I've also been viewing with interest. I'm also in awe and to my shame, with the meticulous records you keep ! :bow: