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Showing content with the highest reputation on 02/08/15 in all areas

  1. 9 points
    Title says it all; 41 x 5min subs, iso 1600, Nikon D810A, Star 71, Baader 3.5nm Ha, no callibration. Extracted only the Red channel and processed only that one, avoiding noise injection caused by debayer. Advantage of a 36 MP camera is that you still end up with decent resolution following this procedure, one can always drizzle if needed. NGC7000 Ha by Yves, on Flickr
  2. 9 points
    I often focus the picture in a single crater, but there are places with such interesting lunar resources that we cover in one context a large area like a bowl, or simply in a single lunar corner. In this particular photo we have of these regional scenes that concatenates a variety of landforms in a nice display. This image, which stretches from Atlas and Hercules in the foreground, through Endymion to the mare humboldtianum is one of the most beautiful corners of the Moon. Atlas is a fractured crater floor with rhymes and dark pyroclastic deposits, as Endymion is a large, crater Plato in style with a smooth and darker floor. But what really draws attention in this picture is the clarity of detail that was captured mare humboldtianum, it is easy to see the chain of mountains located on the inner edge of the other side, since the side facing the Earth is more difficult to detect as it is indistinct due to lack of contrast with the remainder of the relief. Located along the northeastern limb of the Moon (centered at about 56.8 N, 81.5 E), Humboldtianum Basin is a region of interest to NASA. The data show that the basin 650 kilometers in diameter is about 4.5 km deep. The Basin Humboldtianum would have been formed during the Moon Nectarian period, roughly between 3.92 to 3.85 billion years ago. Many other multi-ring impact basins appear to have formed during this time period, including the bowl Crisium. The inner ring of Humboldtianum Basin have the mare humboldtianum (Humboldt Sea), and data from probes reveal that he has a relatively smooth and younger floor as the rest of the basin, probably formed during the period between 3.8 to 3 Imbrian 6 billion years ago. Mare humboldtianum (273 km in diameter) is an ancient impact basin, whose inner ring was flooded by basalt being a difficult viewing area for placing on the libration zone. Mare humboldtianum was named after the explorer Alexander von Humboldt (1769-1859) and is one of only two lunar seas with the names of people, the other mare smythii given in honor of the British astronomer William Henry Smyth (1788-1865). What makes this picture so wonderful is the absolute sharpness throughout the field of view is not always easy to get such a good definition without resorting to mosaic.! Source: LPOD - Charles Wood BLPOD - Avani Soares Adaptation: Avani Soares http://www.astrobin.com/full/198926/0/
  3. 6 points
    A very nice summer target Hope you like it IC 4592 (also known as the Blue Horsehead Nebula) is a reflection nebula in the Scorpius constellation that is lit by Nu Scorpii. Better resolution: http://www.celestialpixels.com/Nebulae/i-WsXbnmZ/A Telescope: Takahashi BabyQ ED85 Mount: Astrophysics Mach1 GTO Camera: QSI 683 (Mono) Filters: Astrodon GenII LRGB Total Exposure: 5h Location: Parnon & Filipaioi Greece
  4. 6 points
    I've recently got an AZ4 for travelling and had found it a real challenge to my habit of doing things with an EQ mount. Aside from not having any slo-mo help on board, the main challenge from the first night was the massive imbalance when hanging the 31mm EP off the back end. Tonight, I worked with the lighter EPs in the collection and had a great time: To see how well I could track I took on the moon full in the face! I'm not that prone to lunar obs but once into it I really enjoyed the sights. I don't know my geography up there but it was easy to get lost amongst the craters and valleys along the terminator. The moon filter was essential and for fun popped the blue filter in. My son thought this looked pretty cool! I was able to track easily at 120x so feeling better about the different mount. Then I thought I'd test out one of my easier star hops from the tip of the arrow in Sagitta, going straight up in altitude to land on the Dumbell Nebula. This was as straightforward as ever using the 17mm Hyperion. I just cannot get over how robust this nebula is with a strong moon, and some fairly moderate LP to boot. It really cannot be missed!!! With the UHC filter on it, I can't choose between averted and direct vision. Popping between the two starts to reveal the shape. If only we could make out the colors which are there with our eyes. Shame about that. I spent quite a bit of time just making sure I could find my way around to favorite spots, and managed to squeeze in a view of Andromeda, which was not bad given the lighting conditions. I finished off by exploring some of the major stars in Sagittarius, though it's pretty murky down that low and plenty of trees in the way. It's been really good to get back in the swing of things with the Astro, and feeling some fresh excitement in the days and months ahead. The relatively warm summer nights make for some fine viewing opportunities. Clear skies all!
  5. 6 points
    I got an hours observing in with my 12" dob tonight. Clouds have rolled across for now though. As well as the usual fare before the Moon showed above the rooftops I got: Cygnus: NGC 6826 - the "Blinking Planetary". I took quite a time finding this as it's rather close to the zenith and moving my dob around that region using the Quikfinder and the RACI needed a bit of gymastics. The result was worth it though. Nice little planetary nebula with the central star prominent. Interestingly, using the DGM NBP filter brightened the central region of the nebula to the point where the central star blended in with the bright core of nebulosity. I prefered the unfiltered view of this one. Needed 200x - 265x to get this object a decent scale in the eyepiece but it was clearly visible a much lower powers, once I'd worked out just where it was in Cygnus ! The nebula did not "blink" on and off as such with 12" of aperture but brightened and dimmed noticably as I switched between averted and direct vision. Cepheus: Mu Cephei – Herschel’s “Garnet Star”. Lovely star that really does "glow" with an orange / red tint. Reminded me of the colour of Pomegranate juice for some reason NGC 40 - Planetary Nebula. Quite hard to find tonight with a bright Moon lurking just below the rooflines. It's magnitude 10.7 with a nice central star of mag 11.7. At low power it was picked up as a small misty halo around a star. Higher powers did not show much more apart from a larger image scale. The NBP filter brightened the nebulosity but this time the central star still showed clearly even with the filter in place. Another planetary nebula added to my list Cassiopeia NGC 129 - open cluster. Rather loose but attractive 6th magnitude grouping of stars about halfway between Beta and Gamma Cassiopeia. Hardly jawdropping but it's a new one for me. And then there were lots of clouds...... Nice while it lasted, though
  6. 6 points
  7. 5 points
    Last night looked like one of promise so I thought I would wheel out the big canon and I don't mean a camera. Got set up and I am getting slowly quicker, if that make a modicum of sense. I tend not to mind setting up early as this time of year the barn sends a large shadow where I plant the Dob. While I was at it I thought I would collimate, so it was in with the laser. Now here is a reason why my entry to the Dob Mod hall of fame will be along one, I was turning away to align the main mirror and wondering why nothing was happening, I was un-doing the truss pole, and that was in broad daylight. One thing that I do find funny is how little work this scope takes to align when you consider you take it apart every time, a solid design I feel. Anyway as I said earlier on in John's thread I got on to Saturn by using an old GPS and laptop, the former I used when walking and just kept it with me when travelling. I had it working with the permision of the Captain of a KLM Jumbo, I was always lucky to get the upper deck seats because of the amount of travel I did and Captain Van Halen was really interested, when going to the speed menu of device he commented, well at least the planes intsuments appear to be right we are doing 560MPH and we are about when it says we are, sadly all this type of contact with the crew is a thing of the past. So Saturn was stunningly clear at X228 with the 10mm Ethos, I have never seen it better, the detail was so clear without the slightest shimmer in the Cassini division or anything and it wasn't even dark in any way shape or form. There was clear banding on the disc and subtle detail in the rings with all A B and C, clear to see. I could already see 4 moons as well and it was only 20 minutes since the sun set. It is said by many that Saturn can take a bit of power so I gave it the 8mm Ethos and X286, this is maybe more than many use and I am in that bunch, it was amasing, not a ripple and sharp as a glass shard. At this point I thought it is time to throw the book at it, 6mm Ethos and X381, never been there before. The only diffence I really noticed was the planet moved across the field of view quicker and was larger, nothing was lost as I saw it and contrast could only get better as it got darker. Many report that differences between top eyepieces are visible more so in larger instruments and this is the biggest scope that I am ever likely to own, (for now) so I started a bit of look at session between the 6mm D and E and without being boring and a full 15 minutes of intense study, could see no difference what so ever other than the obvious. I feel it would be DSO that will split these if anything was ever going to. This is of course nowhere near enough time to make an opinion count and it is not that easy judging anything using a Dobsonian, this really would need to be done over several nights for longer periods but on a quick look there was nothing obvious. The conditions were very good indeed, so stable, so I reached for the Pentax XW 5mm, this give X458 and it was still pretty sharp and nothing had really been lost in the size increase. If you were going to use this amount of wood on the stove on a regular basis a case for the 4.7mm Ethos was a strong one, the trouble is the conditions will not allow this very often. The line that Calvin put in so many threads about the quality of a J Nichol's mirror is one of the truest things I have seen on site, what a mirror, there is no substitute for out and out quality and this just helps these top eyepieces deliver the goods. I don't understand much about mirrors but if over X400 cannot find them out, I guess there can't be too much wrong. As it was starting to get mildly dark the image I was looking at started to fade, a glance up showed the clouds were coming to see me, just as the leading edge started to cover Saturn there was a noticable improvement in the disc details though sadly it didn't stay visible long enough to fully take them in. That was really the end to a short but stunning session, I hope your skies can take this power bashing to-night. Only about 30 minutes from start to finish but superb seeing and I would sooner have that than 3 hours of rubbish. Alan
  8. 5 points
    Hope it was ok doing it this way as some may have slow connections.
  9. 5 points
    Thanks another benefit, one can combine RGB with Ha, only 2 short nights with same equipment. Quick combi with PI script; NGC7000HaRGB by Yves, on Flickr
  10. 4 points
    At this time of year many members of the DS imaging community are hibernating. Down here at Lat 44 we are not doing so, of course. We are wide awake and paying attention! This is one of the most remarkable DS images ever posted on SGL. It isn't the best NAM we've seen, but it is very, very good. What is remarkable is that it was taken with a DSLR (albeit a very expensive one), in Ha, and, above all, with a telescope costing HOW MUCH? Folks, this is a 35mm full format chip and here we have reasonable stars to the edge in a scope costing... (and now you'll have to look up the Star 71 price yourselves because here the net has slowed to a near standstill!) but it ain't expensive. I hope people are looking at this image. I know Yves is buzzed by the camera but it's the scope that is knocking me out just now. But let's not fight over that. This is new technology doing remarkable things. We should all be looking. Olly
  11. 4 points
    Im sticking with the old maxim - "if it aint broke, dont fix it"
  12. 4 points
    Orientation & Processing changes but better I felt.
  13. 4 points
    This was one of those 'wow! ' moments for me. I live near a major city with major light pollution. I have never been to a dark sky site (since I started to take astronomy seriously). I recently used a remote telescope in Sliding Springs, Australia Below is the luminance image, I have pixel overflow and will fix that on my next set of image, but I am blown away by the detail possible with dark skies.... The 11Mp camera did not hurt either I am now deeply envious of those of you who have access to dark skies! 6 x 300 second subs CCD: SBIG STL-11000M Telescope OpticsOTA: Takahashi FSQ ED Aperture: 106mm (0.1 metre) F/Ratio: f/5.0 Full size is here https://www.dropbox.com/s/yheu64raubbuhh3/TrifidGrey.tif?dl=0
  14. 4 points
  15. 3 points
    Hello, new to telescopes and imaging through them. Picked up some great tips here and wanted to join. Last night during blue moon, great horned owl gave me jolt. Swooped down and picked off something or tried 20 -30 feet from me, then just stared at me like I was the odd ball, then started hopping around on the ground, didn't know they could hop. I have a nex 5se with nex-im color burst, will need to do more reading up on the forum, everything moves so fast. Look forward to reading up on stuff. Got best pic so far last night, used 2x barlow on nex burst, ran through regx ( really no clue what im doing), then PS. Any hoot, here it is...
  16. 3 points
  17. 3 points
  18. 3 points
    I'm finding the Quark rather enigmatic! I'm managed a little bit of visual earlier in the week with the WO FLT98 and it was certainly better than with the Megrez 90. I think that is actually due to scope rather than just seeing. Today between clouds I managed a little bit of imaging at native resolution. On-screen the detail was very soft, but I tried my best at focussing and hoped I'd got it the best I could... Plugged two avis into AS2 and then a quick fiddle in IMPPG (and CS2 for the spot) and these popped out. I wonder how impressive the processed images might be if I could get a sharp image on the camera WO 98FLT, Celestron Skyris 274 mono camera, best 50% of 636 frames for proms , and 35% of ~500 frames for spot. No calibration frames (cloud and then rain!) so will need to check the evenness etc of the view later in the week. Helen
  19. 3 points
    Not been around much of late sorry everyone but work has been consuming most of my time. Anyway let's cut to the chase, caught this today from 13:56 to 16:52 so almost 3 hours of data. 272 captures of 500 frames each @ 60Fps, best 10% stacked in AS!2, IMPPG processed & Aligned then Gimp'd to animated Gif. This should go to show a little more what the Quark is capable of catching in the right circumstances, it really is an awesome little filter in it's own right & can hold it's own in solar imaging. So if your on the fence about buying one maybe this might persuade you. Thanks for looking all & I hope you like it. PS I will post an inverted one as well as another topic as I am not sure about two large animated gif's on one post.
  20. 3 points
    Taken this week with guest Paul Kummer. Here the processing is mine. It's a 2 panel mosaic in HaRGB using the house 'twin Tak FSQ106' rig and Mesu 200. Ha was with Tom's Atik 11000 and RGB with Yves' SXVH36. The 3Nm Ha looks after the mass of stars in the star cloud but it all gets more difficult trying to control them in broadband! Total integration just over 22 hours. Higher res Crescent data has been very gently applied. Ha... (Bigger https://ollypenrice.smugmug.com/Other/Best-of-Les-Granges/i-6vDkdgm/0/X3/Cocoon%20to%20Tulip%20Ha%203Nm-X3.jpg ) HaRGB... Bigger HaRGB https://ollypenrice.smugmug.com/Other/Best-of-Les-Granges/i-dwsBgd9/0/X3/Cocoon%20to%20Tulip%20HaRGB%2022%20hours-X3.jpg
  21. 3 points
    Well, I'm another sceptic on much of this stripping and rebuilding of EQ sixes. If you take most things apart and put them together carefully you are likely to get an improvement. I've had quite a few carefully rebuilt EQ sixes visit and I've never seen any of them do much that mine don't do, quite honestly. And mine are totally bog standard, old and hard worked. We pulled one out of a box a couple of years ago, set it up for Franck M106, put our TEC on it, aligned it via the polar scope only, and Franck knocked out a great set of data on the Owl. It's now back in its box. These bearings rotate at just under one revolution per day. Ahem, lets's not get excited. I suppose of chunk of corrosion could affect the response to guiding but think about the rotation speed of one RPD. I'm sceptical. I might be entirely incorrect but I put this stuff in the same back corner of my mind as I put five tonne blobs of concrete to hold piers in place. Internet mythology. I think that what matters is the accuracy of the worm and wheel mesh and precious little else. Olly
  22. 3 points
    Just got nicely back from jodrell. Had a super day, kids loved it and so did the parents we all loved watching the telescope moving too. The gardens there are nice too which the kids enjoyed running around in. So all in all a great day out.
  23. 3 points
    An EP grease would still seem to be the best bet going by this from the SKF Selecting a grease page ...
  24. 3 points
    Took a few shots of the Eastern Veil Nebula in Ha tonight and at ~12:30 I had this little chap run across my feet. I first thought it was our cat, but on reaching down to scratch it I found it was much more spiky than Millie . Took the camera off the scope and grabbed a quick picture (shaky hands with just the head torch on for light). Gave her some dried cat food and she stayed for the rest of the night, very cute, I hope she stays around . Spiky: - Very quick process of the Eastern Veil Nebula in Ha: -
  25. 3 points
    It was an even shorter session for me, I did get onto Saturn in daylight with the 18 inch with help from a GPS compass and a laptop. My what a sight that was,I pushed it to a shade over X380 and the sharpness of this mirror is stunning, it just goes to show it is conditions most of the time. Just as I got a cumfy chair out the Spanish Inquisition showed up in the shape of clouds. It was very interesting as the cloud came on to Saturn though, there was a marked improvement of detail on the disc. I tell you Ethos are very helpful at this power as at 5mm X458 is was flying by but still sharp, which takes some believing. I then saw the Moon rising and assessed that was enough of that, stunning stability in the air for 30 minutes though. Alan.
  26. 3 points
    The problem is smaller pixels are almost inevitably less sensitive.. This new sensor is a bit extreme and designed for a specific purpose Color HD video in very low light... Should make for some interesting wildlife docs in future... Peter...
  27. 3 points
  28. 3 points
    Spiky was back again tonight as I was gathering some OIII shots (tracking was terrible ). The lawn was covered in slugs, so I did not give her any food, I hope she eat well No photos of the Hedgehog, but the Veil has now got some colour (thanks to Steve for tips on how to do this in another thread ).
  29. 3 points
    Nice first light Shaun! Sure VIP is a good Lego to play with Some inspiring ideas about shortening the nosepiece, I've just checked nosepiece, it's exactly the same part as the one comes with Maxbright, typical Baader T2 system, same parts used in different comfigurations. The barlow lens (with M34 thread) can be unscrewed with fingers from the nosepiece. I would like to think that this part (2458199, #12) should be able to replace the nosepiece (barlow lens screws into M34, then T2 to the top parts of VIP), it should shorten the nosepiece by 9-10mm (barlow lens is about 17mm long), and given much better chance to use the barlow in 2" focuser directly.
  30. 3 points
    Here's the progress over the last few days, I took a check of the lap today after I finished work, and after a test press with the mirror face down on the lap I could see the contact was not that good. The lap is down to about 3mm in places on the edge as the ply wasn't the best and I can see it was slightly warped. After several attempts with warm pressing with the mirror face down and the back wet I decided not to continue using it and make a new one. It just wasn't pressing out in the middle. So I headed to the garage which turned out to be 4 hours as I got into making a new lap base this time out of quality baltic birch. Whilst the new 10" lap was gluing (4x 1/2" thick disc's) I continued with the upper tube assembly build which will hit SGL later. Here are the images I took this afternoon before I started Inside ROC Outside ROC It is a fair way off at present but getting nearer by the day. I should have the new lap completed by tomorrow evening so will resume work probably monday. It will also give me time to look into making a set up where I can get foucault images working with my camera although I am still going down the matched Ronchi route I would like to see how the other methods work too. Here's a peek at the upper tube assembly ply as I made a start More soon Damian
  31. 3 points
    I am informed , by one who should know , that in truth the grease used at manufacture/assembly is a proper dampening grease selected correctly for the job . The idea that there is a need to strip it all out and replace it with an 'expensive' lithium grease ... on a unit that operates , at sidereal rate , for a couple of hours , once in a while , is little more than mythical. I think that the "let's strip this thing down and see if I can tweak it" thing has probably developed more from cloudy evenings , wet weather boredom coupled with some folks 'need' to tinker away in the shed than any real "problem that needs fixing" scenario. Regarding the 'overspray' and 'machining' , these mounts are made very well in general . but to a price that brings them within reach to most ... if you want much better machining , finishing and performance then you need to have deeper pockets and look somewhere other than Synta.
  32. 2 points
  33. 2 points
    Just tried the Morpheus. Used my f/8 TSA-102 and the 14mm Morpheus and 14 XW. Not a lot of targets and the Moon is washing out everything. But visited M57, M29, M39, Albireo. In the TSA stars were nice and pinpoint to the edge. XW of course showed some field curvature which that one is famous for. Background was very nicely dark and uniform. Right near the field stop brighter stars showed a little lateral color, and if you examined for astigmatism by racking the star out of focus you could see from the test that there was a very small amount, but so slight that it did not show when the star was in focus. So an in focus star at the field stop showed just as small of a point as it did in the XW when I focused it at the edge. Both eyepieces showed faint stars as well and M57 as well. FOV was obviously larger than the XW but it did not give an impression as greatly larger. Exit pupil was well behaved with no blackouts or kidney bean, and just a little more sensitive than the XW to lateral movements. Overall very comfortable to use. Eye relief felt slightly tighter. With the rubber eyeguard up my eye brow was just touching it. I preferred having it down. Was easy to see the entire FOV and still be comfortably far from the eyepiece, so quite nice compared to 82 degree EPs which for me are a bit of an effort to see the entire AFOV. As days progress will test further and in other scopes, particularly the faster Dob. But off the top really liked it. Have to say this year seems like lots of top quality EPs are coming out. Overall liked it a little better than my XW because the off-axis was better than the 14 XW's and everything else was close or on-par. Will try to catch Saturn tomorrow night with some of the shorter focal lengths.
  34. 2 points
    Slipped a sly one in between the clouds after spending the afternoon on Teggs nose! In my rush I captured one pane without much overlap to crop and the dodgy edge has resulted in a blurred join (bottom left).
  35. 2 points
    I had to wait until mid-afternoon to get a patch of "blue" amongst all the "grey" of the high clouds - ended up with this 39from 128 frames:
  36. 2 points
    Hello I took over the treatment of this region, harder but also more accurate. Certainly one of the best in the world amateur. Clear sky. Luc
  37. 2 points
    Managed to get my scope out a couple of nights ago, realised Saturn was up I managed to find it straight away and just took this picture with my iPhone. My Scope is a Dobs 200P , is it possible to get a better view than this? If so how? Thanks
  38. 2 points
    Hiya Derek.I know John uses both dental plaster and also ply laps and doesn't have any problems so both work. The ply is baltic birch and very dense. 2" thick over a 10" disc would be very difficult to flex. I have cast the lap using the method I used last time which was to put the lap face up and put a dam of foil around it and then just pour the pitch in. I have waited for it to cool to warm before putting it face down on the mirror to press with weight. It has grease proof paper between and gap nearly formed to the shape already. By tomorrow it should be ready for use. Damian
  39. 2 points
    You're an an honest man. But isn't it strange that we seek out the darkest possible conditions but somehow our imagination and ancient deep-seated fears dictate how comfortable we can be ... No worries, though, in early August the shadowy whirligigs, bogles and elementals of the night aren't up to full strength yet ... I think. :-))
  40. 2 points
    Seeing turned out to be ok so shot a load of Ca-K ser's. Results below First up, full disk. Two pane mosaic using the 0.5x reducer. I took 2000 frames @ 30fps just in case. Stitched in MSIce. 20150802 by David Smith, on Flickr The took out the reducer and shot the Sun's midriff. Two panes stitched in MSIce again. 20150802_CaK_Slice by David Smith, on Flickr Same image in mono invert format 20150802_CaK_Slice by David Smith, on Flickr 20150802_CaK_Slice_Invert by David Smith, on Flickr And finally AR12394 with the Revelation 2x barlow in place AR12394_2x by David Smith, on Flickr
  41. 2 points
    I've just bought one to put on my 16 inch handbuilt refractor.... Oh, had I nodded off?
  42. 2 points
    Great images as usual Don, if you ever have any doubt that some of the moonlight is being blocked by your UV/IR filter just try taking a lunar image via an IR pass filter. I did just that using a 680nm IR pass filter, this was a single shot at 1/10 of a second and ISO-100 at F9: (looks just the same at 820nm but needs slightly longer exposure)
  43. 2 points
  44. 2 points
    Hi All Imaged the Eastern Veil last night from Newton Aycliffe. A bit annoyed with myself as i did not keep an eye on things, was in to much of a hurry and discover half of my Ha subs were a tad out of focus, also not got the Veil in the Centre. However i managed to rescue the image using all the subs. IC410 & Tadpoles was imaged last week under poorer skies, not sure about the colour mix, however quite please with both shots. FSQ85 & SX 694 Thanks for looki
  45. 2 points
    Great report, Kevin, and glad you're getting familiar with the AZ4. I picked one up used a few months ago and it gets a lot of use as it's so robust. Spends a lot of time in the boot of the car so I can take advantage of lunchtime white light solar sessions, and sometimes sits in my study with the ST120 or SkyMax on it ready to go outside at a moment's notice. "Simple, robust workhorse" is how I'd describe it.
  46. 2 points
    Business must be so good you can ignore customers, not good in the age of the internet. Wonder how many customers they lose?
  47. 2 points
    As mentioned by Stu I have a Meade s5000 80mm triplet. I bought it for about £200 used. The focuser is not the best but with some tinkering is now reasonable and holds a 2" diagonal and 26mm Nagler at zenith. Despite being a dob fan I have really enjoyed using fracs more since buying my first ed. Until then the ca even on long slow fracs bugged me. Given your specs the 80mm fast ed / apo is a great choice. I'd try and get an aluminium tripod az4 for travel and pick up a used cg5/heq5 steel tripod for home use. You'll love your new scope. Although more effort I found using bins for astro most uncomfortable
  48. 2 points
    I can't wait either! Thanks. I've now made a 20" f3.8 that may be ever better than this 18" mirror but it will be in a dob scope so not really any good for imaging planets unless I power it but I plan too. 20inch f3.8 Ronchi by Raymond Collecutt, on Flickr 20inch f3.8 surface profile by Raymond Collecutt, on Flickr 20" f3.8 Image of surface by Raymond Collecutt, on Flickr
  49. 2 points
    Ive had some extra Ha data sitting around for weeks and I've done nothing with it until tonight (bit bored as you can see!). Anyway, I stacked it, stitched it and processed it. I think Ive reached the point of ever diminshing returns in regard to Ha luminance, so I'll call it a day (or night!) on this one. This time round ive used the J P Metsavainio star removal action to see if it helps keep the OIII bloat on large stars to a minimum.... which it did quite well. It didnt completely remove all the stars from the RGB layer, which is probably to be expected as there are a few big un's in there. Ive also backed off on the colour saturation and tinkered with the balance a bit to give it a more conservative colour scheme as the last one was a little OTT in retrospect. Thanks for looking! Rob
  50. 2 points
    Hello A new image for you : Clear sky. Luc
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