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Found 15 results

  1. The 3.5 hours of RGB data was originally captured back in March 2013 with the 550D and with the moon close by at around 82%. At the time i was quite happy with it, but i always felt it was lacking some details. In March 2014 i captured some L data with the QHY5L-II-M. About 65x 1 min exposures. The details were there, but due to the lack of Registar it would take me another 2 years to add it to the RGB image, which i now finally have. It's more noisy, but so much more detailed! Attaching 2 versions of the LRGB, and the old RGB for comparison. Also the L data for those who's curious what the QHY5L-II-M "guide/planetary" camera is able to capture.
  2. This is something of a work in progress as more data is yet to be be added in order to get as much detail as possible. So far this image is made from 52 x 30 second exposures at 6400 ISO (from 107 originally put in Deep Sky Stacker) plus 10 dark frames, eight flat frames and 20 bias/offset frames. Post processing done in Photoshop CS6.
  3. With another clear sky last night I set up the scope again and tracked on M13 for a while as the sky gradually darkened. It got better and better as dusk turned steadily to reasonable darkness. I then star-hopped to M51, it was about 23:00 by then, and the cores of M51a and M51b were clearly visible. My wife had joined me by this stage and we did a bit of navigating around the milky way using just our eyes, which we can see from our back garden as the light pollution isn't so bad where we are, and we returned to the telescope to see the view improve as the sky got slowly darker. I could just about make out the faint disk like glow around M51a and with some imagination the glow extended around M51b. I also very fleetingly saw hints of darker banding in the glow - though this may be my imagination. I was using my 15 mm EP to make the image reasonably bright. The sky still had a faint glow, even by midnight, and (apart from waiting until later in the year when the sky would be darker) would a nebula filter help with a galaxy? As I mentioned the light pollution isn't so bad and what glow there is in the sky is a very pale grey. The milky way can still be made out fairly well overhead though it merges into the grey towards the horizon.
  4. From the album: SW 150PDS - DSLR 600D / Atik Titan/Atik 314L1+/Atik Infinity

    Taken on 28 February 2017 using: SW200 PDS, HEQ5 Pro, Atik Infinity CCD Camera preprocessed in AstroArt and Startools and processed in Photoshop
  5. spaceman_spiff


    From the album: Photos from Bury

    M51 (the Whirlpool Galaxy). I spent a good portion of the night on this one. Hardware details: Camera: Nikon D200 Telescope: SW Evostar 120 with Baader contrast booster. Mount: AZ-EQ6 guided using a ST80 synguider. Image details: Lights: 35 x 3min at ISO 800 Lights (and darks) were taken with 1 minute intervals (to let the camera cool down) Darks: 30 x 3min at ISO 800 Flats: 30 x 1/40s at ISO 800 Bias: 30 x 1/8000 at ISO 100 Date of capture 14/01/2016 Conditions: Very clear sky with no cloud. Seeing was good, the guiding was not as stable, the wind was picking up and causing slight movement. Cold and dry.

    © DH Elijah

  6. This is my first image with a Canon 500D, modified for astro. Seems to be a big improvement on my unmodded NikonD5300. I guess its not the best subject for increased sensitivity though. I think some of the tidal structures are showing? And this shows what else is present....
  7. Wow, what a difference a dark sky and a fast scope makes! It's been a while since I last imaged this galaxy and this time I tried it using the 150mm Newtonian on its first outing to a place with much darker skies than murky north London where I usually operate from. This shot was done from Kelvedon Common in Essex and the difference between this and my earlier attempts is incredible - I could see from the first sub that this was going to be a vast improvement. Once it was stacked it needed very little processing. I wish more than ever to move out of the city now 20 x 120 second exposures at 400 ISO (58 minutes integration time). 12 x dark frames 79 x flat frames 21 x bias/offset frames (subtracted from flat frames only) Captured with APT Guided with PHD2 Processed in Nebulosity and Photoshop Equipment: Sky-Watcher Explorer-150PDS Skywatcher EQ5 Mount Orion 50mm Mini Guide Scope ZWO ASI120 MC imaging and guiding camera Canon 700D DSLR
  8. From the album: Deep Sky Objects

    M51 - Taken as a quick test of polar alignment and only an hours worth of data with a full moon, so I did not expect much. However it came out better than I thought. I will have another go at this one when conditions are more favourable and aim for 2.5 - 3 Hours worth of data. If you want more detail the astrobin link is: http://www.astrobin.com/250229/
  9. M51, one of my favourite targets - each time I come back to it I get a bit more detail out of it. It's still not quite there yet but this isn't too bad for just under an hour of exposure with my scope (I wanted to get a few more shots but the camera battery ran out and by then it was about 5am and time to call it a night). No doubt more data will be added over the next few weeks. 7 x 8 minute exposures at 400 ISO 10 x dark frames 9 x flat frames 24 x bias/offset frames (subtracted from flat frames only) Guided with PHD Processed in Nebulosity and Photoshop
  10. Shibby

    Whirlpool M51 50pc2

    From the album: Deep Sky

    M51 repro
  11. Hi all , Is anyone else having trouble finding or observing M51 Whirlpool Galaxy near Ursa Major ? I tried to find it for the first time last night but gave up after ten minutes ... then tonight I thought I'd give it another try , this time first with binoculars , and relatively quickly found what looked like a faint fuzz in that general area . When I located it with the 200P at x 75 magnification ( 32mm and x 2 Barlow ) l could just make out two faint but distinct blobs , the main light core of the Galaxy and the light core of the tail as well but both were quite faint in this lighter region of the N/W Summer sky , compared to M57 in Hercules for example . Is M51 best left as a Winter target or is it just better observed with a bigger scope ?
  12. I decided to attempt to enhance my M51 image taken with my SW 80 ED/NEQ6 last year with some Luminescence data that I had acquired through some unguided test shots with my new SW Esprit 150/10micron GM1000HPS combination. Since I've never tried to combine data from two difference scopes, I decided to simply overlay the post processed result of my previous attempt with the new luminescence data and aligned the images via Registar. After a bit of processing in PS and Pixinsight I got the result below. The image represents just over 9 hours integration time. Alan LIGHTS ED 80: L:11,R:10,G:9,B:8 x 600s. Ha: 2 x 1200s. LIGHTS Esprit 150: L:5 x 600s, 2x1800s. DARKS: 30; BIAS:100; FLATS:40
  13. Went out Tuesday night to do some more practice with my new Celestron AVX mount, as a clear night was predicted. I wanted to improve my polar alignment and tested drift alignment for the first time. It came out very well, and I thought that I'd better not let it go to waste, so I went on to capture M51. The thing is though, I had neglected/underestimated how much wind there would be that night, and it got horrible very quick. The medium wind (according to weather stations) was around 10m/s with gusts being more than that at its peak, but stubborn as I was I just endured it, knowingly that the a lot of the subs would be straight for the trashcan. On top of that, it was 1.5-2 days after the full moon, so the sky was veeery lit up, proving even more of a challenge. But again, the lack of clear skies lately, made me not want to waste it. So I ended up gathering around 64 frames of 1 minute at ISO 6400. I did try doing 2 minute and 3 minute exposures. They didn't show much trailing, but were a lot more prone to the strong gusts that made the stars jiggle, so I kept to doing 1 minute subs. And even out of those, only around 4 subs were decent without much traces of the strong wind.. Of course deep sky stacker didn't like my horrendous shaped stars, so I went on to stack 60 of them manually (at this point I didn't care about the shapes of the stars, I just wanted to see what data was hidden in it), stacking 5 at a time, and then stacking those 12 stacks 4 at a time, and then the last 3, for an estimated total exposure time of 60 minutes +- (as I was using a remote without a timer).. Nonetheless, this is what one of the better subs looked like, and what eventually came out of it, and I am glad that I could at least pull something out of this, and this just makes me want to get out and shoot even more (preferably on less windy nights)! 60 Subs (1min+-) 60 Min Total Exp ISO 6400 20 Dark Frames Celestron 130 SLT OTA Celestron AVX Mount Baader 2.25 Barlow (For focus) -Mathias
  14. Hi all Due to a run of bad weather, I reprocessed an old image of M51. 3x20m 1x15m 9x10m calibrated with about 43d 200f 120b. Andy
  15. From the album: Deep Sky III

    In 2017 I went through a major upgrade of my imaging equipment and moved from a SW NEQ6/SW ED 80 to a SW Esprit 150/10micron GM1000HPS combination. In the course of testing my new mount in unguided mode I took some M51 Lum test shots at 600 and 1800s with the Esprit 150. Rather than waste this data I decided to see if I could use it to try to improve an Ha + LRGB image that I had acquired in 2016 with my NEQ6/ED 80 combination. Since I've never tried to blend data from two difference telescopes, I decided to take the lower resolution post processed Ha + LRGB image and to treat it as "RGB" data (this image can be seen in my gallery Deep Sky II M51 reprocessed). I then took the higher resolution Lum data that I had acquired with the Esprit 150 and used this as a Luminosity layer within PS (I aligned the Lum and "RGB" data via Registar). After a little processing in Pixinsight and PS I got the above result.
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