Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.


Popular Content

Showing content with the highest reputation on 16/03/19 in all areas

  1. 25 points
    This image comprises recent Ha data from e-Eye from the TEC140/QSI690 Steve and I operate and SII, Ha and OIII data from my home observatory in Totnes acquired in 2018 using my WO 132FLT/QSI683 at 1.47"/px, here. Steve and I have been imaging the Rosette core at 0.75"/px early evening as the moon has been rising before switching to other targets mid-evening. We will not be able to collect the SII and OIII this season so I processed the 28 x 1200s of Ha and re-aligned my older image to provide the 'colour' for the higher resolution Ha data: it is effectively like imaging bin 1 for the Ha and bin 2 for the SII and OIII. After a crop to take care of the mis-aligmnent and some additional NR due to the resampling, a few enhancements, et voila! The 'Carnival of Animals' reference is of course the resemblance of the dark dust to a troop of fantastical animals and Saint-Saens humorous musical suite. . . which animals, well your guess is as good as mine. CS! (minimal chance in the UK at the moment though . . . ) Ha data: Barry Wilson & Steve Milne. Balance of NB data: Barry Wilson (For those with an interest in the 'dark side', I am continuing to add topics to the tutorials on my SmugMug site: Calibration & Assembly, Basic LRGB workflow (in 5 parts), Boosting star colour, Starless NB technique, Deconvolution, Mure DeNoise, Introduction to enhancements . . . more to follow on masks, mosaics, NR, star reduction.)
  2. 12 points
    Orion has drifted too far west for me to image now, so this is my result of a winter's worth of imaging on this target. Over several nights I've acquired and stacked (in total from different exposure lengths) from two cameras: LUMINANCE = 8 hours 20 minutes RED = 1 hour 33 minutes GREEN = 1 hour 34 mintes BLUE = 1 hour 34 minutes Total exposure time = 13 hours Captured in APT, integrated in APP, processing in PS. Thanks for having a look, Adam.
  3. 11 points
    Hi everyone, A bit of an odd one aspect ratio wise, but fun to put together - first light for my new ASI294MC OSC and technically my first experimental attempt at a mosaic! My first stab at using the camera meant I went for 30 second subs, I need to experiment more to settle on my ideal sub length...still, the results are decent for a low integration time of 1.7 hours. I love the Orion constellation and if I had the skies and time, I would mosaic the whole thing, but failing that, I can do bits and pieces! Orion's Belt is amazing to me, the three stars, Alnitak, Alnilam and Mintaka, very distinctive in the night sky. Full details on Astrobin. Thanks for looking!
  4. 9 points
    Big surprise (literally) at last night's club meeting. We've been donated an 18" mirror made in 1930, with a focal length of 120 inches and weighs 22kg. It has a long history and has been in 3 or 4 different scopes, I'm afraid I forgotten the makers name.. Lee's calculations suggest we can make a folded Newtonian that will fit (just) inside our observatory which is nearing completion.
  5. 9 points
    My first real attempt in combining narrow band images from my ASI1600mm cool with the TS100Q. Still a long way to go in both imaging and processing skills, but i guess i wouldn't be doing this if it were easy Ha 33x180s OIII 40x180s SII 37x180s -20deg All pre/post-processing done in Pixinsight.
  6. 8 points
    Hi All, I recently acquired an SX694 mono imager and have been testing it with an Astrodon 5nm NB Ha filter. Last night I had the opportunity to set up my 1100HD with Hyperstar on Maunakea. Here are some results. Don Rosette Nebula 10x45s Horsehead/Flame Nebulae 7x45s Eta Carinae Nebula 1x90s NGC3324 and Gem Cluster 1x90s Heart of the Heart Nebula 7x45s
  7. 7 points
    Hi all. It's been a while since i managed to get any data together for an image and i first started on this about 6 weeks ago so i was delighted to get some more recently. I first thought i could get about 20 hours but the weather fixed that and i've decided to call this done till next year. Ha 11 hrs with my now sold William Optics Star 71 9.5 hrs of questionable quality in 60 and 120 second subs Takahashi Epsilon 130d Zwo Asi 071 Richard.
  8. 7 points
    Hi all I reprocessed this LHaRGB image of M81 (3h25m Lum, 10, 5, 3, 1min subs), about 1hr each of RGB and ha, so about 7h25m altogether). Still not totally happy with it, but it's as good as it'll ever be. - Andy - LHaRGB bp copy.tif
  9. 6 points
    Definitely showing improvement. The first image is with an unmodified 1100D (150 x 30 lights with flat and dark frames) the second an unmodified 100D (67 x 30sec Light with Flats and darks applied) and the final image was after I had the 1100D modified (130 x 30sec lights with Darks applied). All images taken using an Astronomik CLS filter SW ED 80 with flattener on an HEQ5 goto mount. All were processed with Startools (using online tutorials as I don't really know what I'm doing ?) interestingly I did not apply any colour to the 3rd image in startools and I think its the best one.
  10. 5 points
    So, it's perpetually windy, the imaging laptop has self destructed due to condensation and water ingress and today has no immediate plans...... Prompted by a thread raised on here a few weeks ago, I dug out some OSC photos I took of the Moon during the last cycle as a post session finale and gave it a go. When I stretched the saturation, I did go to 'ELEVEN' on the sliders to exaggerate the effect, but hey-ho !! Apologies to purists for the limbs...... makes me wonder if it is mineral content or chromatic aberration ?? Details: Equinox 80 and QHY8pro ( 40 stacked subs) Multilated in PhotoShop. Well, it makes the Moon a bit more interesting.....
  11. 5 points
    I was bad this year and bought myself an esprit 80 ed and an ASI 071 OSC camera which I've paired with my little tak FS60 and atik 383L+ for some dual scope imaging. The theory is with all the crappy weather in the UK and with so little time for geeking out having two scopes means I can get everything done in half the time. That's the theory... in practice it means twice as much goes wrong BUT... I did get everything working (ish) and managed to bag some one and a half nights of data in Jan and the begging of feb from my roof in London zone 2. I processed in APP and GIMP which seems to be better than photoshop version 2 which I have been using and its FREE.... yay! FYI I have a youtube channel : astrobiscuit
  12. 4 points
    Hi all, I know this is going to rub some of you the wrong way but after a little experiment with different blends I got to this. HHO. I Know that the image has problems ( egg stars, noise and other things ) but i do like the colour of this version. Taken with my SW 130 pds and asi 1600 mm. hard crop from an awful flame and horse head shot that was full of internal reflections. Thanks for looking, hints and tips welcome.
  13. 4 points
    I think these might do it. 6" F5. ?
  14. 4 points
    Building an eyepiece set is quite personal and not an easy task in my opinion. Besides, an eyepiece set alone is a bit meaningless if not considered with a telescope (or set of telescopes..). I chose my set considering the exit pupil and optical quality after a lot of reading and discussions with an experienced observer. To me the brand comes last. I haven't changed my set in almost one year and don't feel the need to. It just works for my needs.
  15. 3 points
    Hi All, Finally got out and did a bit of sketching again. (Also just been catching up on other brilliant sketches on here this morning). I did a couple of my usual rough-and-ready sketches which I then tinted on the computer. (I quite liked the result of the tint! I might do that again, or use a coloured pencil next time). I'm not sure of any crater names I'm afraid. I'm going to have a look at a moon map later and see if I can identify them). I know there were near the terminator on Wednesday evening the 13th March. Cheers all. Martin.
  16. 3 points
    I've had a fab night observing the Moon, which tonight showed a spectacular terminator. As the night went on, I decided to take a look at the tiny white spot Linne, after reading an article about its mysterious history. Madler described it as a definite crater, but most other seasoned lunar observers see it merely as a featureless white spot. Some make note of a tiny crater pit at the summit. Situated on the Mare lava plane of Serenitatis, Linne is an easy target to find. Attached is a sketch of tonight's observation of Linne, using an FC100DC Takahashi refractor and Vixen 3.4mm HR & 2mm HR eyepieces, giving magnifications of 218X & 370X respectively.
  17. 3 points
    IC 443 from the 27.2.19 using NB1 filter. I have noticed i get some halos using the NB1 filter on very bright stars so ive been learning how to reduce this within pixinsight using starhalo script. It may not be perfect but for a first attempt im reasonably pleased. 59x2.5min exposures
  18. 3 points
    The weather has turned from unpleasant to horrible, so I've decided to call it a day for today. Whilst keeping an eye on the rugby I've been finishing off insulating the outside walls of the warm room. The additional insulation I needed arrived earlier this week and I've been doing a few pieces between home time and darkness falling in the evenings when it was possible, but today I was determined to get through the rest of it. To insulate the internal wall I need to clad one side first, but I haven't ordered the ply for cladding the walls yet. And before I can fix it I need to adjust the window height (and make the opening the correct size) and also make sure rain can't run back along the roof rails into the scope room, so those are probably the next two jobs. I really do need to think about making a proper door soon, too. Really could do with an improvement in the weather soon. We've had winds gusting up to 45-50mph pretty much without a break for the last ten days or so now and that's no time for working with the roof open or mucking about with lengths of cladding James
  19. 3 points
    Some pics of progress so far Before: 3 leadscrew levelling of the frame with 4-point levelling of the bed (on weedy 3mm bolts) The new frame with new 300mm cross piece. This supports the centre-back leadscrew and bed mount and also adds some extra rigidity. The bed mounts are equidistant. Newly designed common leadscrew and bed mounting part. The bed will mount using M4 low-profile bolts to an M4 nut embedded in the part. With leadscrew nut fitted That's as far as I have got today. Next job is to fit the frame back into the printer and line up the screws. I'll drill the new plate once I'm happy with the screw positions and the levelling is working correctly.
  20. 3 points
    Away this weekend camping under what I expected to be cloudy skies, I was surprised by a clear spell of several hours. Having the trusty Tak and AZGTi with me, I set it up just using the handset, not bothering to attempt a WiFi connection as I expected it to be a brief session. Unfortunately Orion was past its best by the time I was setup, so the only views I had of M42 were not the best. High power just showed fairly mushy stars due to the low altitude, but low power was a better view. I was using the 24mm Panoptic to keep weight down. A Docter 12.5mm provided mid range and the Nag Zoom was there for high power. At best the skies measured around mag 20.9. I took one reading just over 21, and later on it dipped to 20.6 ish, due to the hazy cloud reflecting LP I guess. Given that my skies at home are around mag 19, this sky felt like luxury for me, despite not being able to get properly dark adapted due to local lighting around where I was observing. I took in a number of the old favourites which look ok from home, but even with only 4" aperture the benefits of the dark sky showed in the deeper contrast and fainter stars resolved. The Auriga Clusters and M35 were all wonderful, I'm always amazed how different they all are, despite all being open clusters. Two stand out views from the session though for me. First was the Leo Triplet, and I do just about mean triplet! M65 and 66 were fairly easy, but NGC3628 was a challenge which needed averted vision. At first I couldn't see anything, but once I got a little better adapted and shielded my eye I picked it up quite easily. I don't see these from home in this scope so it was a pleasing get. Second one was M97 and M108. Again I don't see these easily from home but even unfiltered M97 was a lovely small round glow, and m108 a classic edge on spiral galaxy, great to get both in the field of view at one time. Unfortunately I didn't get the chance to view at higher power with a UHC to see if I could see eyes on M97. I failed later on with M101, I suspect because of high cloud which came in ahead of the thicker full cover. Before that though I did also get some good views of M51. Two clear cores, one a little bigger than the other and a halo of the spiral arms surrounding each. It's funny how your mind plays tricks with you, it was quite easy to visualise spirals in the haloes which I'm sure cannot be seen at this aperture so must be some memory effect from seeing images perhaps? Anyhow, nothing earth shattering, but a good and unexpected little session. EDIT for completeness I should add Algieba to the list as it looked fab.
  21. 3 points
    I had about 5 minutes of milky skies to check the sun. Nothing in WL but a very long & sharp filament was visible near the Eastern limb. Approved by Gong-Ha as a rather fuzzy streak. 40mm Meade 4000s with William Optics 2x Barlow nose in TS binoviewers in PST modded 6" f/8 +D-ERF provided a good view of the whole disk. I'd gained so much path length with the 2x WO nose that I had to keep adding 2" extensions. I usually need a star diagonal but it was still early. Nicely spread surface detail before it rapidly clouded over. Thanks to Peter for the Barlow nose tip.
  22. 3 points
    All paintwork in the scope room is finished . Time permitting, tomorrow I may lay the rubber flooring. After that, it's onto the warm room - painting the walls, laying the carpet tiles and then playing around with some form of desk (not necessarily in that order!).
  23. 3 points
    I think that is a very unfair representation of that can be achieved with a DSLR to be honest. So this is my M33 with a Canon 550D. Adam
  24. 2 points
    I spent a long time waiting for a suitable adapter from QHY for a PoleMaster CCD for my AP Mach1 mount. There were postings from the company that one was on its way, but it never materialised. So, in the end, I came up with my own solution, which others might want to take advantage of. Essentially, I designed an adapter in Onshape and then sent it away to be 3D printed (I don't have a printer). The design works really well and sits over the polar scope exit port, and while it has three holes to accept the thumbscrews of the sliding door, it sits so snuggly it doesn't really need them. https://cad.onshape.com/documents/6399e6c65d7ca220918c69e8/w/d68b250f8767100c43389209/e/91882ebb44b3b26c6c192228 If you open the design in Onshape (using the link above) simply right mouse button click on the tab at the bottom of the screen to export the design in a format suitable for your 3D printer. Here are some picture of my adapter fitted to my Mach1 mount. As you can see I did fit a QHY PoleMaster adapter for AVX mounts in addition to my adapter. I admit this is a bit over-the-top, but it is convenient for installing and uninstalling the Polemaster camera. If you wanted to save money you could screw the camera directly to my adapter. You could then just push fit the camera and adapter into the polar scope exit port every time you wanted to use it. Like I said it is very snug when I had it printed. Sorry about the bad quality of the pictures - let's hope my astrophotography is a bit better ?? Hope some Mach1 owners find my design useful - I'd be interested to know if anyone actually prints my design....
  25. 2 points
    This was fun to make. It’s a computer painting, made with a Wacom drawing tablet, Photoshop and Corel Painter essentials. As a starting point I used a computer generated image of the Moon for 13 Feb 2019 at 22:00 UT from https://svs.gsfc.nasa.gov/4442. In Photoshop, the original was cropped and enlarged till it was big and blurry. It was then sharpened, posterized and greatly enhanced in contrast. The oil paint filter was applied. The result served as an underpainting which was elaborated in Painter, mostly with a sharp bristled smeary brush. I softened the result by pushing the paint around with a soft camel hair brush. Back in Photoshop, I reduced the image in size and applied a black mask, a burlap texture and some annotation to get this final result. Only the larger details you see here are real. All texture comes from the brushes in Painter and the filters in Photoshop. I hope you like it.
  26. 2 points
    I received a new batch of black card, a nice white gel ink pen and pencil and a red light torch from my son. I sketched this outside with a pair of Olympus 10x50s handheld.
  27. 2 points
    I will take the advice and not buy anything just yet. But I am still curious about what I can do to my Skymax 127? It wont do any harm to consider my options out of interest as much as functionality.
  28. 2 points
    Comet 46P/Wirtanen photographed on February 10th 2019 when passing near bright star Theta Ursae Majoris of magnitude 3. After its maximum with magnitude 4 on past December, here the comet has dropped until magnitude 8 with a greenish coma which also has reduced condensation and angular size to 10 arcminutes. Telescope GSO 8" N f/3.8. Camera Atik 383L+. L=8x120s bin1 + RGB=3x60s bin2. From Vallés, Valencia (Spain). http://cometografia.es/46p-wirtanen-20190210/
  29. 2 points
    Competition time !! Sorry tp scrawl over your gorgeous image. This is what I see..... maybe I had too much Stilton for lunch !!!! But what a fantastic image. Look out HST.....
  30. 2 points
  31. 2 points
    With my XW/XLs I used to screw the eyecup as far "in" (lowest position ) as it would go, then gradually rotate the eyepiece holder outwards until it felt most comfortable and I could see the whole FOV. In my experience Pentax XW/XL ranges are some of the most comfortable eyepieces out there. I really like the new Morpheus range which have similar eye relief but offer two screw on eyecups of different heights to suit different observers. I find these excellent, so much better than the original versions which were poorly fitting and flimsy. What's more, the Morphs have a 76deg FOV: 6 deg more than the XW, but somehow it seems more in use - and I can take in the whole field no problem (I don't wear glasses to observe). I'd probably choose fixed height vs adjustable eyecups, but others may well feel the opposite. But there is no doubt that either way, optimum comfort is essential to get the most from your scope and eyepiece combination☺. Dave
  32. 2 points
    Just for a comparison here is the SHO version.
  33. 2 points
    Today I reprocessed my original Rosette data from the image at the beginning of this post . . I think it's altogether much better , but your thoughts always welcome .? i used APP to process and stack the image then Photoshop & lightroom for the post processing.
  34. 2 points
    Very nice.. you can reduce the magenta halos in Pixinsight by inverting the image, using SCNR green (experiment with the %age amount, I find around 70%works well on my images) to remove them ( they've turned green) then re-invert. Its because the Oiii (Blue) and Sii (Red) stars aren't as tight as the Ha ones.. (I think) Dave
  35. 2 points
    To be honest although I had a tripod I never used it as I have a pier, so I can't advise from that perspective. The centre balance is really quite unique. For those that asked the iOptrons use Commander, which at first looks quite basic, but I found it very simple to use to get excellent results, when you launch it, it asks how do you want to connect, e.g. RS232/USB or Wi-Fi/Ethernet and then it launches the main program where you can activate various pop up dialogues: - Hope that helps?
  36. 2 points
    The top section unscrews all the way off to reveal an M43 thread to attach a camera adapter either for afocal or eyepiece projection photography.
  37. 2 points
    I have found the contrary iOptron would appear to underestimate the capacity, I really loaded my 60 up and it didn't even flinch. The IEQ45 will be discontinued in favour of the CEM40. With regards to the Comparison to the EQ6 range, the CEM40 would be the best comparison, but it does come at a lot more dosh.
  38. 2 points
    Old Nicks eps have served him well and aren't the most expensive ones...I'm sure one of them is an old whisky glass!!!
  39. 2 points
    You need to add thermal insulation to the cold finger, though some uninsulated copper will attract moisture away from the sensor which will be warmer.
  40. 2 points
    Floppy is a really naughty teddy.
  41. 2 points
    Okay great, phew. It felt like I was going blind!
  42. 2 points
    Well, hang on a bit. Leaving aside policing styles I was using my pointer at a club evening ‘in a field’ with lots of folk and several of them said they couldn’t see the laser line unless they came closer. So different atmospherics? Different power? Different colour? I don’t know but I agree with Louis and I would think that if someone phoned the police they must have been pretty close before they could have seen it. There’s nothing adversarial here, Hallingskies. As you write, ‘just sharing my experience’. I planned to leave this thread ‘cos I had nothing to add but felt I ought to chip in again. ?
  43. 2 points
    Really John?! There isn't even room in your eyepiece case for just a tiny addition or two, or three?? Floppy says "They are really cute." But don't let me try and tempt you!
  44. 2 points
    AP is challenging enough with all the right equipment, but having a sensitive camera helps a lot. I started out with a high end mount and decent refractor with a DSLR then moved to a OSC CCD then finally mono and filters. Here are the 3 images of M33 I managed with each of these set ups, sure my knowledge and technique have improved also, but I think they illustrate the point.
  45. 2 points
    Piero, Here are various pictures of my Lukehurst. Its the "Deluxe" standard edition. But I customized pretty much everything away from Davids standard spec. 1. I imported Powered groundboard system, 10K encoders, DSC cables & 20" Telescope Cover from AstroSystems (USA) 2. I imported a Nexus push-to from Astro Devices (Australia) 2a. I imported a Tablet Stalk from Markless Astronomics (USA). 3. I purchased a 2.5" travel Feathertouch focuser and Dob mounting plate from FLO 4. I specified a cooling fan for the main mirror. 5. I dropped the standard finder scope and asked David to install a Baader finder shoe for my Baader Skysurfer 5. 6. I bought the cats eye centre spot and posted to David for installation on the primary mirror. 7. I purchased a Kendrick secondary heater and Kendrick mini dew controller (for the UTA) which David installed very neatly including a system where the secondary dew heater wiring passed up inside the truss tubes! David was happy to install all the electrics and encoders (he made up all the arms etc needed to mount the encoders). He installed a lovely balance system free of charge too! - my personal contribution was to buy various cables, fuses & connectors, then make up all the cabling necessary. I went for a Oldham Optics mirror (although the grind was completed by John Nichol) and I have Orion Optics Hi-Lux coatings. Here are some random pics taken in the 2 years that I have had the scope (HTH!) As said above, collimation rarely needs touching. I dont move the scope much and the star diffraction rings are always perfect. Occasionally I feel sorry for my Howie Glatter tools and give them a tweak! Its best to phone David up and talk to him about what you want. He will build whatever you specify! I imported all the bits and bobs myself to save David messing with customs etc and then I travelled to Nottingham to see the build and deliver all the lovely scope stuff that I had accumulated! Over the 4 months that I waited for my scope, we exchanged many emails (David is always quick to respond) and I decided to travel to Nottingham to collect my scope in person (to take delivery) although David does offer a personal delivery service (in his own car!) He is a nice man to deal with and whats better than a UK made scope! Alan
  46. 1 point
    Great to be out Stu, the Auriga Clusters are thankfull objects. This week the same here, clouds and more clouds. But some times a small break so I could have a swing at the Auriga Clusters with my bino.
  47. 1 point
    You are right in saying that random sequence is incompressible, but not in part where you say that it can't contain pattern. Pattern is something we understand "naturally" because our brain is pattern matching machine, but pattern is something "agreed" upon - i.e. you need a pattern matching machine to recognize a pattern. When we have random source of numbers for example (1 and 0), then sequence 101001100101110101001111 is equally likely as sequence 111100001111000011110000, provided that oracle has uniform distribution. We would say that second sequence is highly structured, but that does not tell us if it was product of random process or not. It's probability rather than pattern that defines randomness. This hints to strong relation of randomness to time - as without time we can't asses if something is truly random or not.
  48. 1 point
    Why should you use additional cable if USB is enough? plus, pulse guiding is actually a bit more reliable if guided via EQMOD, as per PHD2 and qhy connection problem, - usually it is driver related, check if you have all. if it not helps, try upgrade PHD2 to the latest dev beta, my ASImini was also not recognized by default release version.
  49. 1 point
    I use Astroberry - the set up isn't that difficult at all, and I'm a Linux amateur. The creator of Astroberry is on here ( @RadekK ) and support on the Indi forums is excellent.
  50. 1 point
    That's round about 3 hours of 10 min subs. with darks, flats, bias etc. I keep meaning to add to it but I get side tracked to other targets and the clouds wont stay away.
  • Newsletter

    Want to keep up to date with all our latest news and information?
    Sign Up
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.