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If anyone is looking for a great telescope, I'm selling my NexStar 8SE. It's in great condition, Optics are immaculate and there is only some signs of use on the dovetail bar and the black rim that has faded a bit on one side. The reason that I'm selling is that I'm looking to upgrade.
I had some amazing views of planets and DSO through this scope.... it really is a performer in quite a compact package.
This scope was on a CGEM most of it life so the NexStar Alt-Az mount was hardly used.
I prefer to have this scope local pickup or I'm happy to deliver and even give a tutorial and demonstration of how to use it.. for that reason I'm targeting a buyer around Sydney Australia.
The price I'm asking is $1650AUD.
I came across the knowledge of NGC1055 galaxy in Cetus by accident while looking at some Hubble images and thought that this Galaxy was possibly a rarely imaged object since I didn't see any images posted of it. Googling this galaxy there are a few amateur images, but still not as many as other galaxies or objects and seems very unpopular.
This galaxy was not in my "Star Walk" app so I thought that perhaps its not in the simpler star map programs that people use? or due to the fat that it is quite faint... it is in Cartes Du Ciel and Star Map HD.
Enough of my google babble, tech specs time... this was imaged using my NexStar 8SE on the CGEM mount at F10 (2032mm) through my unmodded DSLRs. I initially started imaging the galaxy using my Canon 7D to try to get a higher resolution but realised that the 7D is not only as sensitive as my 40D, modded or unmodded, but a 600 second sub heated up the sensor to 43 degrees as reported by APT. Surely this would generate more noise but I decided to allow the rest of this and next night to image using the 7D.
I was curious about the difference between the sub quality between my 40D and 7D so I changed the DSLR used to the stock 40D and the difference was staggering... the 40D only heated up to 21-23 degrees, there was more of the galaxy visible in the 600 second sub but the subs had a noticeable less noise.
Each night conditions were very similar, seeing, temperature etc, so I figure that the reason for higher sensitivity was the fact that the 40D has physically bigger pixels and so more photos hit each of the receptors...
Total Exposure time was:
57 x 600 sec subs (20 subs through the 7D and 37 subs on the 40D)
23 x 150 sec subs (all 40D)
12 x 60 sec subs (all 40D)
The galaxy was mid height in my northern sky and I always started imaging 10-15 degrees east of the meridian until sunrise, so I only really had about 3 hours per night of imaging it before the galaxy was obscured... that includes finding the guide star, calibrating and start the process which took about 30 minutes.
It's not anywhere near the hubble image or most of the amateur images but I hope you like it, thanks for looking...
Looking through my newly acquired Celestron nexstar 8SE from the comfort of my newly built Denver observing ChairBy Badweather
I had just acquired my new 8 SE and realized very quickly that I needed an observing chair.
So I built one.
I'll show you the important modifications I made in subsequent images
While waiting for the Tarantula to get into imaging position to grab some Ha and OIII subs to add to the previous posted image, I decided to do a quick 47Tuc image. Unfortunately when centered, there was no guide star in the OAG at the current setup, and I did not want to alter the position of the OAG since it was still setup from a previous session to continue on NGC2070... so some unguided subs of the glob had to suffice... it's only 15 x 60sec, 15 x 30sec and 15 x 10sec subs in ISO800 at F10 using the modded Canon 40D.
Seeing wasn't the best but surprisingly being unguided the stars were round, fat but round... I guess it's only 60 seconds at longest sub and PA was quite accurate.
This is the first Saturn imaged since I moved. Seeing was above average, but not the best I have ever experienced.
The most I could manage decent data is through a 2X barlow max.. 3X was staring to go a little soft.
Imaged using Imaging Source 21au618 using standard R, G & B filters and a IR Cut filter through the 8SE on 29th May 2016.
3000 frames IR Cut Luma.
2000 frames R & G filters.
750 frames B filter.
Used best 25% frames.
Color balanced in PS.