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Found 28 results

  1. A few months back, i bought my first mono camera, an Atik 383l+ from Martin @Xsubmariner off here. I hadn't had a chance to give it a whirl until last night. I thought about getting the 80ED out, but i've been wanting to do some widefield stuff for a while, so i attached an old Tamron 135mm F2.8 vintage M42 lens i picked up last year for next to nothing. The lens needs to be stopped down to F5.6 (perhaps less, i haven't tested though) to produce acceptable stars in broadband, but i was hoping it could be used more wide open for Narrowband. I used step-down rings screwed on to the end of the lens hood to bring the aperture down to 37mm, which is about F3.65 (i did briefly try it wide open in Ha, and it wasn't that bad tbh, but i could still make out some comet-shaped stars in a few places so i opted to stop it down a bit to play it safe). I have a TS Optics filter drawer in the optical train, so i can still swap out filters without too much fuss. I still have about 3-4mm of extra backfocus space to spare, but i can already find focus as it is, so i'm not sure if it's that important that i haven't fully used it all up. Focusing was tough. I was focusing using a Bahtinov mask on Deneb, and i had to use 10s subs (subframes) at 2x2 bin to get bright enough spikes for Bahtinov Grabber to pick up to the spikes ok. Even then, it was showing the focus error moving about quite a bit, even without me touching the focus ring. In the end i just got it as close as i could and went with it. Conditions were not great. Some clear spells, but there was a lot of cloud passing through. I figures it would be good enough for a test session. The Phd guide graph looked horrific, and was somewhere in the 1-2" range (image scale is 8.4" so not a big deal hopefully). I bodged together a couple of old dovetails to add enough weight to counter-balance the 5Kg counterweight. It just about does. It's not perfect by any means, but hopefully sufficient for this purpose. I would ideally like to shoot 1200s subs, but couldn't last night due to the constant clouds (Phd lost the guide star countless times). I was about to give up, but persisted and aimed for 600s subs. Glad i did, as i ended up with 6 useable subs, even if a couple were affected by some thin cloud. Did a quick stack in APP and a 10 min process in PS, just to get a rough idea of what i can expect from this. I used Flats and a couple of Darks just to do a rough calibration. Didn't do any gradient reduction, was in too much of a hurry after packing up last night. Overall i'm fairly pleased with how it performed. I'm obviously not aiming for Samyang 135mm F2 levels of performance here, but for purely NB bi-colour mosaics i think it can do a job. I've included a picture of the rig below as well, in case anyone's interested. CS. 6 x 600s (1 Hr) Atik 383l+ 2" Baader Ha 7nm Tamron Adaptall2 135mm F2.8 (@F3.65)
  2. From the album: Ken's images

    43 x 45s ISO 1600 using Esprit 80 on the Evo mount and the Canon 60D. 28 Bias, 85 darks and 40 flats calibrated, stacked and processed in PixInsight with final tweaks in Photoshop.
  3. Here is a telephoto version of these classics that are still visible at my latitude for a few hours. I gathered the Ha data 2 April with my Canon 300mm f/4 and a 12nm clip filter (unmodded Canon 60D, 6 x 25 min) to which I added RGB data from 11 November gathered with my Samyang 135mm f/2 (169 x 1 min). All @ ISO1600. So totally 5.3 hours of data. I think I like the colours but some may think they are a bit over the top. Maybe I should pull back on saturation? C & S most welcome! Cheers
  4. Here is the North American Nebula in the Hubble pallet and HA. I'm still a relative novice to the Hubble pallet adjustment and didn't want to overcook it? Most probably it can be pushed a little further? The image was capture using the trusty ST10 and the BabyQ FSQ85 over the course of this month. I have been battling with the weather to complete this before my holidays start tomorrow!!! 12x 800sec HA 17x 600sec OIII (2x2binned) 15x 600sec SII (2x2binned) I binned the OIII and SII since these are very weak in the nebula and don't contribute much in the way of detail. The HA data has been used as the GREEN channel and also a Luminance channel for the final image. The HA data is a little wider since I have had some small alignment issues between sessions, still setting up and tearing down my kit each night / session This is the alternative colour schema, I suppose that there is no wrong or right colour schema its just down to your personal preference? Which one do you like?
  5. alan4908


    From the album: Deep Sky

    A reprocessed image of NGC7000 - my original process is also within this album. The main difference is that I started processing by applying Pixinsight DBE, background neutralization and colour calibration functions to eliminate the light pollution gradient gradient. To try to minimise the effect of bloated stars I used Pixinsight's masked stretch. Various other operations where processed in CCDstack and PS. My main learning from this is the importance of removing light pollution gradients prior to stretching, if you don't, then obtaining a colour balance and star colours can be more difficult, particularly when you have stars embedded within nebulosity.
  6. With old blobby back to normal last night I had a play with the Nikon D5100 Monotec + 7nm Ha filter and gathered 4x600s subs at 1600 iso with the Altair 115 EDT-APO. Processed in PI (calibrated, aligned, integrated etc) with a final tweak in PS.
  7. Hi guys! Got to test my modded 1100D last night and I'm kinda pleased with the results! Picked up a lot of red stuff, post-p is still not my strong point, I may get more out of it. Looking for some C&C and perhaps soms post-p tips to improve the image. Thanks for watching! Here's the stack info: 120 x 60 second frames @ ISO 1600 60 bias frames 120 dark frames 600mm focal length f/7.5 HEQ5 Tracking Mount Modded Canon EOS 1100D TS UHC Filter Taken with Back Yard EOS Stacked in Deep Sky Stacker and processed in Photoshop/Lightroom
  8. From the album: Alt-Az / NoEQ DSO challenge

    America and Pelican nebulas, taken as a single FoV Gear: Olympus E-PL6 with OM-Zuiko 200mm/4 at F/4 on Celestron Nexstar SLT Capture: 29 lights (/100% keep) x 30s x 3200iso, 10 darks Processing: Regim 3.3, Fotoxx 12.01+ Site: Deep country 26km from Limoges, France Sky: good seing, SQM=21.4

    © Fabien COUTANT

  9. From the album: CCD venture

    A h-alpha shot of the Wall section of NGC7000 aka north america nebula. ED80 - ATK16HR - Ha clip filter - EQ6 - finderguider 9x50mm PhD2 - photoshop - DSS.
  10. Aenima

    ngc7000red ha -

    From the album: CCD venture

    A h-alpha shot of the Wall section of NGC7000 aka north america nebula. ED80 - ATK16HR - Ha clip filter - EQ6 - finderguider 9x50mm PhD2 - photoshop - DSS.

    © 2016JayBird

  11. Two clear nights running to try out my new Samyang 135mm with the 428ex. This is 24x300s processed in PI: DBEx2, MaskedStretch, HDRM + LHE. I know this combination produces significant undersampling but that aside I am very pleased with the widefield capability now available with the 428ex. Thank you for looking. Adrian
  12. NGC7000 (North American nebula)Well known emission nebula in Cygnus constellation.Finally after few weeks I've managed to test my new AZ EQ6 mount under fairly good sky in Firle area.Heavier than HEQ5Pro but more sturdy and well machined mount.Scope: Skywatcher EVOSTAR 80ED DS-Pro Mount: AZ EQ6-GT Camera: QHY168C Filter Optolong L-PRO MAX Luminosity Guiding camera: ZWO ASI120MC Guiding scope: SW 9x50 finderscope 24x300s exposure at -10°C (120min total) binning 1x1 20x darks 30x bias 20x flats Another version with added H-alpha frames in more autumn palette. Colour - 24x300s exposure at -10°C (120min total)H-Alpha - 12x300s exposure at -10°C (60 min total)180 minutes together.
  13. Hi all After a frustrating time getting my head around which side of the pier to begin this image (the dreaded tripod leg collision dilema) I resorted to two nights of imaging for this one. Im very pleased with the results. Using EQMod / Stellarium scope to find the target, disable meridian flip and halt tracking just before the collision point! Canon 1000D / CLS Filter clip Skywatcher 250px Guiding with ToUcam Pro II 25x 5 min exposures Darks on the fly 30x Flats Thanks for looking
  14. Follow up from my Ha image last month, now managed to get the OIII and SII, but been tough with short nights and unpredictable weather For the full size version go here - http://astrob.in/106038/0/ This is my toughest shot yet, taken a month of imaging over 6 nights, with a total time of 8.7hours!! capture details as follows Ha - 11x10mins SII - 4x10mins and 4x30mins (these were tricky) OIII - 19x10mins and 2x30mins (also tricky) Total time of 520mins or 31,200 seconds!! I could get more data on this but its a law of diminishing returns so time to move onto the next challenge, I'm pleased with this for now . All taken with my MN190 scope with Atik cooled CCD (@ -20deg C) on my homebuild pier and roll off shed observatory. Thanks for looking Keith
  15. ... or worst! These are two differently processed North American Nebulae.... But which one should I use for my Christmas cards this year? Decisions, decisions!
  16. I took quite a long time, but I found enough time this weekend to do 2 testshots on NGC 7000 and the Veil Nebula with the following equipment: mount: Astrotrac Camera: modded 450D with Astronomik CLS Clip-Filter - set to ISO 1600 Lens: Nikon Ed 2.8 / 180mm, stopped down to 4.0 - which was a lucky, pretty cheap purchase on ebay Unfortunately the CLS Clip-Filter i have is not the CCD-type with built-in IR-Block, I think, the CCD-type will lead to better results, as the normal CLS is more suitable for an unmodded EOS. As I had some trouble with humidity, I frequently had to use my wifes hairdryer to keep condensations away from the lens - exposure time therefore was short. NGC 7000: exposed 24 x 60 sec Veil-Nebula exposed 22 x 90 sec hope you like the pics and comments are very welcome have always clear skies Wolfgang Southern Germany - Lake of Constance
  17. Does anyone else find binoculars are far better in the initial hunt for DSOs ? I found 3 new DSOs tonight with binoculars , M56 , M27 and NGC7000 and will have a longer look at them next time in a telescope . Well pleased with that result tonight especially given that the Moon is 92% full .
  18. Messy I know, but with what I have to work with atm, I'm really happy so far. Hoping to add more data NGC 7000 North American Nebula Exif: Canon 550D 55mm (cropped) @ f / 4 3162 seconds (542 x 6 seconds) ISO 6400 Taken over 3 nights under Bortle 5/6 No darks / offsets
  19. Approximately one year ago I posted my first attempt at NGC7000 which was taken with my OSC camera. Having recently added Pixinsight to my software tools collection, I was interested to see how a reprocess would look. I choose this image since I'd previously found it very difficult to remove the light pollution gradient and control star bloat. The reprocessed image uses a combination of Pixinsights DBE, background neutralization, colour calibration and linear fit functions to eliminate the light pollution gradients and obtain colour balance. To reduce the impact of bloated stars I used the Pixinsight masked stretch before transferring it into PS. Whilst I don't believe the image will win any awards, it clearly demonstrates to me the importance of removing light pollution gradients prior to image stretching. Original result (Sept 2015) - processed in MaximDL/Photoshop Reprocess - processed in Pixinsight/CCDstack/Photoshop LIGHTS: 20 x 600s, DARKS: 40; FLATS: 20; BIAS: 100. Alan
  20. A few firsts on this one.. Managed to dodge the clouds & showers Sat night & grab First Light for the QSI683wsg-8 & Astrodons, my first mosaic and first time I've bothered to image these targets as I've never been able to fit them in! This was just supposed to be a couple of test targets to get an idea of the FOV & flatness but I got kinda hooked in processing & ended up putting them together. So there's a bit of cropping as it wasn't planned. This really is a nice camera.. what a difference after years with the faithful 314's. Think I'm hooked on hoovering up the sky now... this is most definitely a work in progress.. Only calibration is Bias. No Darks or Flats NGC7000 6x900 IC5067 7x900 Astrodon 5nm Ha
  21. After feeling that I had given up too early last Saturday, I was more determined to spend some time at the eyepiece. To begin with, as the sky reached astronomical darkness around 9:20pm, it was clear. I spent a little time looking for the signposts for the brightest part of the North American nebula (NGC 7000). The gulf of Mexico area is punctuated by a near perfect square of stars between Xi Cygni and Deneb. Sadly, clouds that seemed to come from nowhere began moving across Cygnus. As a result, I moved onto NGC 404, the Ghost of Mirach. The galaxy is at magnitude 10.5 but has a reasonable surface brightness. The challenge is that there is the glare of Mirach to contend with. It should make an equilateral triangle with that and another nearby 8th magnitude star. Once again, before I managed to confirm a sighting, the clouds had followed me across the sky. I moved onto Lacerta to hunt for NGC 7243 (Caldwell 16), a bright open cluster which should be more tolerant of any rogue clouds. Thankfully there was enough of a gap to confirm the cluster. Centered on a small equilateral triangle of stars, including one very close double, I managed to count between 30 and 40 members. I then tried the same with the Casseopeia open cluster NGC 7789 but had no luck as the cloud started to thicken up. .....and BBC weather said it would be clear! __________________________________________________ ______ Observing Session: Tuesday 11th September 2012, 21:20 hrs to 22:05 hrs BST VLM at Zenith: 4.9 - 5.0 New - Revisited - Failed
  22. Here is the North American Nebula in H-Alpha. This is only 10x 800sec with the ST10 which is a H-Alpha hoover, it simply suck-up H-Alpha since this is where it is most sensitive, approx. 60%!!! This is also the first image from the BabyQ and it has performed fantastically. I have never seen FWHM values consistently well below 1 before now, not even with the TOA130F. At my location narrow band imaging is a lot better than RGB, I simply get too many issues using broadband filters.... Unfortunately, the good weather has gone to be replaced by the rain! The second image has an additional contrast stretch and sharpening applied in PhotoShop. There is a little too much noise but its due to the fact that my DARKS at taken at -20Deg.C and the camera's thermo-electric cooler was struggling to get below -15 Deg.C due to the hot sticky nights lately.
  23. rotatux

    2016-07-24 deneb

    From the album: Wide-field (not barn-door)

    Deneb and NGC7000 "America" nebula. Capture: 12 x 30s x 1250iso, 5 darks, Olympus E-PM1 with Helios "44M-6" 58mm/2 at 2.8 on Omegon EQ-300 tracking RA, neodymium filter. Date: 2016-07-24 Place: near country 50km from Paris, France

    © Fabien COUTANT

  24. alan4908


    From the album: Deep Sky

    My very first picture from East Sussex ! Bloated stars where the main challenge in this image and I attempted to tame them via the StarShrink PS plugin from Russell Croman. I wasn't using dithering at the time, so the raw images contain quite a few defects which I had to process out with PS. Taken in June 2015 with a Trius SX26C and SW ED80. LIGHTS: 20 x 600s; DARKS: 40; BIAS: 100; FLATS: 40.
  25. On Friday my third used Canon 60D arrived from Amazon and Saturday night the sky cleared and I finally got my triple rig together consisting of a 60D on a Samyang 135 f/2, a 60D on a Canon 300mm f/4 and a 60Da (the factory modded version of 60D) sitting on my ES 127 ED apo, all on an EQ8 mount in my obsy. I went for two targets, starting shooting at NGC7000 around 7 pm and then at midnight it was getting too low so I shifted to IC348. I was of course asking for triple trouble but I got some useful data to process. All was supposed to be at ISO1600 but after a meridian flip at 01.30 I forgot to turn down the 60Da from 12800 ISO (used for focusing and framing) to 1600 ISO, so there I lost 4 hours on one camera. Also, after changing camera batteries the 60D sitting on the 300mm decided to change from f/4 to f/5 without asking me, which explains the rays around the brighter stars on the IC348 image form this lens. I show three images, one from each scope. NGC7000 & Co from the 135 Samyang. This is 169 x 1 min. A really nice little lens with very little aberrations. The 60D is quite good at picking up Ha even if it is not modded. IC348 with the 300mm Canon. 63 x 3 min. Unfortunately not at the native f/4 but accidentally at f/5 as explained above. Not sure I like what the internal iris does to the stars, so next time I have to make sure it is set on f/4 (or stop it down with filter rings). There is an odd green thing in the middle of the image. I eft it there since I have no idea what it is or may have caused it. IC348 with the 5" ES 127ED apo. Unfortunately only 8 x 6 min (due to my ISO setting miss hap) but it is clearly a cool target that deserves another go with plenty of subs next time. Top of my list now. SQM was 21.0 but there were probably some tiny ice crystals in the air that particularly affected the refractor images. Temperature was ca -4 °C and I soon had frost on everything except the heated front lenses, as seen in the picture from next morning. Comments and suggestions (including what the green thing is) most welcome! Cheers
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