Jump to content

sgl_imaging_challenge_2021_annual.thumb.jpg.3fc34f695a81b16210333189a3162ac7.jpg

Leaderboard

Popular Content

Showing content with the highest reputation on 16/06/15 in all areas

  1. Hello Sometimes show images at 100% does not allow to see all the details. If you are looking the smallest craters visible it is necessary to enlarge the image. Here are somes pictures, Copernicus at 300%, Copernicus at 120%, a part of Clavius at 120%, Atlas at 300% and Walter's area at 150%. Of course click on images for full resolution. Regards. Luc
    11 points
  2. This is the luminance data for M51. For the colors I'll have to wait a little bit as the clouds and I seem to have a disagreement Acquisition details: - 24x600s lights with a Hutech IDAS LPS-D1 filter - 60 dark frames, 60 bias frames, no flats (I forgot about them so I had to remove the dust bunnies in PS) Equipment: - scope: SW ED80 with TeleVue TRF-2008 FF/FR on SW AT-EQ6 GT mount - camera: Atik 460ex + EFW2 AstroBin link Clear skies, Andrei
    10 points
  3. An image from last night of the cocoon nebula. 15 X 5 mins exposures taken through a skywatcher 190MN, ATIK 314L plus mono.
    9 points
  4. Just back from a small break in the far north. Although there was no astronomical light , we were talking to the family who owned the rental cottage. I mentioned stargazing , they told me that relative had bought their children a scope, but they couldn't see anything with it. They asked if I could have a look to see if was ok. A few minutes checking it over and a few practical pointers followed. I also gave them the 2015 stargazing guide. We were very surprised when they asked if we'd like to stay an extra night for free as thanks. Always worth mentioning the dark arts, Nick.
    9 points
  5. This is a description of my latest (and hopefully final!) travel kit which I can take abroad with me. It has all bases covered, including solar white light and Ha, plus standard Astro. The scopes The basis of the kit is the Tak FS-60C, a 60mm fluorite doublet which is very light and can be easily disassembled for travel. I am using this with the short CSV tube which at 105mm long vs the standard 145mm makes it even more compact. It is really a remarkably small yet capable little scope in this format. I had expected to need extension tubes but basically I have this covered off in the modified p
    7 points
  6. Thank you. Another big image. Clear sky. Luc
    7 points
  7. Quite a mixed bag now im off to bed, knackered. I processed one full mosaic also but I want to see how the other two have turned out first.
    6 points
  8. The IC1805 ( Heart Nebula ) is about 7500 light years away in constellation Cassiopeia. The object is of an emission nebula showing wonderful glow of ionized elements in a gas cloud and dust lanes In a very centre of the nebula, floats the Melotte 15, it contains few very bright stars, nearly 60 times mass of our Sun, and many dim ones. The solar wind, a radiation pressure, from massive stars makes the gas twist to a various shapes. Image from London In December 2014 over a period of two nights Setup: Skywatcher Espirt 100ED Telescope QSI 690 CCD Ha 8 x 600s seconds, SII 8 x 600s and OIII 5 x
    6 points
  9. Noctilucent Clouds of course. This year I have already seen 3 displays before the solstice which is quite unusual Here's a nightscape from a field close to my dark-sky site a few nights ago - hoping for some betters ones over the next 4 weeks Last years finest display from a field near my house - this one was truly stunning electric blue bright! And a very pretty wispy display from 2011 The bright star in all these views is Capella - Gemini/lynx region to left, Perseus/Andromeda to the right I've managed to image NCLs every year from 2005 when we moved house and got clear low views of the n
    5 points
  10. took these then thought about a mosaic so i overlaid them on a wide field image from a google search i am afraid it did not say who took it. but it was just to show me how much more i have to do. and it is quite a lot just as well its in the sky for quite some time yet lol. anyway here are my images. NGC-6960 NGC-6995 and now the mapped image (not my image for the base layer) it looks like it is going to take 15 panes to get it all in 5x3. thanks for looking and all cc welcome. taken with the atik 383l+ on a 200pds azEQ6-gt HaRGB 14 x Ha at 900 sec each - 6 x RGB at 300 sec each for both i
    5 points
  11. Quickie of Omega 5x120s red 5x120s green 5x120s blue Planewave CDK 17 and FLI Proline 16803
    5 points
  12. I thought about sharing the notes of the observation I had last night. Although some clouds appeared from North-West at about 23:00, so many other targets were accessible at South. Curiously, I did not even plan to see so many targets, but I though about limiting to view planets and some double star last night. After seeing Antares, I decided to give a 'quick' view (which lasted a while eventually) to North Sagittarius. So glad I did it! Once returned home, I was so excited that I struggle sleeping! Date: 15/06/2015, 21:45-0:30 Location: Cambridge Temperature ©: 10 (wind: 5km/h) Seeing (Ant
    4 points
  13. Clear blue sky here this afternoon with pretty decent conditions. New stuff on the way 80ED + skyris 274. //Johan
    4 points
  14. My latest project the Western Veil Nebula. Two panes of Ha, 5Hours 30Minutes on each pane. Capturing OIII (currently at approx 3 Hours on each pane) aiming for 5 hours+. This was captured in my back garden, with no astronomical darkness, in the light pollution of Stoke-On-Trent and a LED streetlight peering over my garden wall. The processing errors are all my own Can't wait for the darkness to return, eyeing up the Elephant's trunk nebula next. Think it may even fit on a single pane Rob
    4 points
  15. Hi, I bother! So far captured the Eagle, Swan and Trifid nebulas. Last attempt was two years ago when I was struggling to get an LX80 to produce better than 15s subs! Suffice to say this months images are miles better (though I still have some way to go with the processing ). Hopefully I'll get a chance this week to grab a widefield view of the Lagoon, Trifid and M21. So, certainly have go. John
    4 points
  16. Experimenting with the conversion go Raw to tiff, as this camera is new not a lot of options are available, and for this image I used the nikon software, but when examined at full res many small stars had severe red halo's which where not present in my previous shots, at first I thought it was mis focus ... it probably is to some extend. But using the same workflow as my first light, so using PI to do the debayer, the issue is almost gone and quality is much better ... (I'm talking about the stars, not the overall image that is pure post proc and taste) Propeller and Friends v3 by Yves Van den
    4 points
  17. Here is mine. Feel free, and I have a higher resolution version without the watermark if you like it.
    4 points
  18. Finally had a chance to try and capture the Milky Way. The results are VERY noisy, since I had to increase the ISO because the camera lens is F3.5... These two images are at 20 sec exposure, F3.5. The first image is at ISO 12,800. The second image is at ISO 6,400. I am using the Samsung NX2000. - We don't have a tripod, so we just put the camera on the ground, with a phone wedged underneath the lens to keep it angled up. - It was kind of a cloudy night, but every now and then the sky would clear for a good while. - These images are at reduced size. I thought that the conversion to a lower size
    3 points
  19. So I've taken the plunge and bought a used Atik 314L+, manual filter wheel and a set of LRGB filters. Against all odds and seemingly disproving the theory linking new kit with cloud cover I was blessed with clear skies immediately after taking delivery of my new CCD. The crescent nebula seemed a good target as the moon was still around and it gave me a chance to try the Astronomik Ha 12nm filter I'd bought earlier but hadn't really used. I had to throw out a few of my Ha subs as I hadn't tightened the locking screw on the focuser enough and the focus shifted during the beginning of the session
    3 points
  20. A later shot today as I had clouds for breakfast Some haze this afternoon and seeing was not the best but I have seen much worse recently. 20150616 by David_The_Bears_Fan, on Flickr 20150616mono by David_The_Bears_Fan, on Flickr Sketching next
    3 points
  21. Hi Finally got round to processing my IC1396 (Elephant's Trunk Nebula) data that I acquired a couple of weeks ago. This is my first attempt at mapping NB data to the HST palette. Quite tricky reining in the Ha (green channel) but I'm happy with the result. Details: Ha 12x600s, OIII 12x600s, SII 5x600s, all 1x1 binning, plus bias and flats. Processed with PI. Regards John
    2 points
  22. Hi all, Decided to head out last night and have a crack at the ringed planet. As everyone knows this one is quite low at the moment. I set up over an hour before hand to check out conditions, as well as get the scope and mount set and cooling. I only managed around 5 runs at it before stopping for the evening. Focus was very on and off...transparency was meant to be good, but seeing only had fleeting moments. Only having done Jove before, this planet really does change everything. to get close enough I had to use a x2 barlow, and found it really tricky to judge focus (used a mask in the end).
    2 points
  23. Picked up the near-two-percent illuminated Moon in 10x50s this A.M. and no question this is the thinnest crescent I have yet seen at 25 1/4 hours from New. Camera image required cropping and some contrast enhancement to the jpg to be seen at all. Shot at 0551hrs local. Slightly left and above center, some monitors will not show it, I imagine.
    2 points
  24. I just sold my EQ8 so before delivering it to the buyer i decided to compare the weight and size of it with my new 10 Micron GM2000 HPS II ultraportable. The GM2000 is a little bigger and feels much beefier...before weighing it i also notied that it's much heavier than the EQ8 which seemed weird because it was supposed to weigh just 5kg more. Official weight is listed as: EQ8 25kg GM 2000 II Ultraportable 2x15kg My measurements EQ8 25.7kg GM 2000 II Ultraportable 33.7kg (without dovetail plate and pier plate) (3.7kg more than the officialy listed numbers) Counterweight bars (not included in
    2 points
  25. Nope! That was the 60's and 70's I know as I remember it well. Ahh?! You young uns.... Derek
    2 points
  26. Don't worry, I'm not going anywhere too distant, within Europe anyway and anything valuable will be in my hand luggage. I took a WO66 to Tanzania on safari, including flights in 4 seat single prop planes and managed to get away with it!!
    2 points
  27. And the sketch to go with them.
    2 points
  28. I get a bit OCD about refractor collimation I can tell that the TAL has a nicely figured objective as it shows a really nicely defined airey disk and diffraction rings which look very similar inside and outside of sharp focus. The optics seem to handle high power well too. Up to now the frustration has been the slightly displaced diffraction rings, due, as I now realise, to coma. Despite this the scope was showing nice detail on Jupiter and Saturn, Venus without excessive fringing and has spilt double stars to 1.5 arc seconds separation. TAL's have often been described as "quirky" and it's a
    2 points
  29. Thanks very much for all the feedback on this issue folks - much appreciated I've got the opical axis of the focuser on the scope accurately aligned with the optical axis of the objective now. The diagonal is in pretty good collimation having tested it on my other refractors and a (collimated) laser put in the diagonal drawtube exits the objective pretty much spot on the centre. Last night I played around with the small grub screws marked with the blue arrow on the photo above. The results were pretty much as Peter describes above though I was using a star test to check each small adjustment.
    2 points
  30. So, that would be "ultraportable" in the sense that an M1 tank is cavalry?
    2 points
  31. I wanna see that Rob....best of luck mate I've managed a grand total of 3-4 15 min subs in Ha on the eagle this yr. one of these days I'm gonna get some quality time on these southern gems Eagle_M16_TV_Pro by Scott Prideaux, on Flickr
    2 points
  32. Sorry, but I can't agree with your results. I believe unity gain is not the brightest or best image, but the point where one additional photon produces one count. In your example, that appears to be ISO 800. This is what would be expected for your camera. Past that the image appears "brighter", as amplification is applied, doubling the count again and again.
    2 points
  33. taken this morning seeing was pretty good ed80 quark blackfly camera bestt 100 out of a 1000 frames imppg decon finished in photoshop hope you like
    2 points
  34. Hi all, Thanks to another poor weekend, I caught up on stacking some old files and dug out this little animation, which spans about five to ten seconds, where I was lucky to catch a bit of flaring starting up. Thanks for looking, Luke --- 9th May, 2015 Equinox 120, Quark Chromosphere, Grasshopper 3 camera (ICX687), 0.5x reducer, firelighters
    2 points
  35. I've got my ED120 refractor out this evening waiting for Saturn to clear the rooftops. Although it's a clear night the seeing is not all that steady so tight doubles such as Delta Cygni are proving a little less well defined than the refractor is capable of showing. While browsing around Hercules I had a look at M13, as you do, and then decided to have a go at getting the galaxy that lies (in line of sight terms) within 1 degree of the great globular cluster, NGC 6207. The ED120 is a great scope for planetary and binary star observing but 4.7 inches aperture is not a lot for galaxies under my
    2 points
  36. They allow alignment of the objective elements, e.g. centreing, they are not collimation screws. There is no true collimation adjustment on a TAL cell, Tal rely on the collimateable diagonal for collimation which isnt the best method. The red screws hold the cell onto the tube. If you want to collimate the objective you will have to loosen these screws, wobble the cell till you get collimation, then tighten and hope the collimation stays on. If the collimation shifts during tightening then you will have to drill and tap new holes. Just another reason why I dont think Tals are the best scopes a
    2 points
  37. Siebert optics have the info on which OCA you will need to allow bino-viewing with the PST & other Ha setups. Quite a useful site on this topic.
    2 points
  38. John, the screws marked with blue press against the edge of the outer lens maybe allowing a little sideways movement, the putty is near impossible to remove, but may come out with a little determination but i would not like to say what they do, i would still say leave well alone
    2 points
  39. It was a fruitful (and too hot) Saturday morning with good seeing. Everything captured with Chameleon 3 mono (ICX445), stacked in AviStack 2, post-processed and aligned with ImPPG, colored in GIMP. Mandatory full disc with Lunt 35: Lunt 35 90 mm mod, mosaics stitched in MS ICE: And finally, animation of the M1.3 flare at AR 2360 (maximum at 7:29 UT). 30-second intervals, shortened to 15 seconds around the maximum. Total: 1:23 h. Shutter time was reduced on two occassions during capture. On closer inspection there is a long, faint arc entering the sunspot shortly before the flare's maximum
    2 points
  40. I agree with you Chris, binoviewers make a HUGE difference in Solar viewing - white light and HA. I've used a pair of six inch refractor binos at The Astronomy Centre with mylar over each objective, it's so good it makes your toes curl up! As well as a PST (and PST mods and other HA gear at TAC) I own a Quark chromosphere and using a binoviewer with it takes it into another sphere for visual observing - so good in fact I almost never use a single eyepiece with it. It's just a shame there doesn't appear a way to use a binoviewer with the PST or indeed with a PST mod - unless someone out there
    2 points
  41. Damian, As you know I have been (mostly) silently cheering you on from the sidelines, having little to add other than moral support. To pick up your point, I think it takes plenty of courage to document and live the experience publicly, warts and all. It would be far easier to have made your mistakes in private so I applaud you for putting this all out there for everyone to benefit from. Keep on keeping on!! Cheers, Stu
    2 points
  42. Trouble is, once you have looked through an Ethos with a really large aperture dob, you don't want to steer clear of them !
    2 points
  43. I know I added my images to the Deep Sky Imaging section, but thought I would add my M81 and M82 attempt to show that even someone relativity new to the scope and Astrophotography can get a half decent from this excellent scope.
    2 points
  44. All yours to do with it what you want, royalties free, copyright free, if you get no better offers. James
    2 points
  45. Did you extinguish all the light pollution in one breath?
    2 points
  46. Hi, I think I'm becoming conscious of coma in my 15" f/4.5 scope. I've never personally seen the effect of a paracorr, and I was thinking of doing a little poll here to see at what focal ratio people would recommend a coma corrector. My EPs are Naglers and a Pan24 - no 100° EPs in my case. If enough people respond with f-ratio and yes/no for coma correction, it perhaps it would lend itself to me posting a little chart of paracorr use vs focal ratio (possibly vs afov if reported too if that makes sense to do??). Perhaps f/4.5 is on the cusp of it being an obvious decision...? Thoughts & com
    1 point
  47. Great report on a very good night's observing
    1 point
  48. simonfromsussex wins at 3.4...I waited for so long for a paracorr 2 to come up second-hand,just didn't happen so I bought mine on offer at the hertsy festival along with the 21 ethos...cheap weekend!!.very happy with mine indeed as I am with my whole set-up....content calv!
    1 point
  49. You can also get a fair focus check on a far away building or trees etc when it is nearly dark if the moon is not up.
    1 point
  • Newsletter

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

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.