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Found 91 results

  1. THIS ITEM HAS NOW BEEN SOLD. This listing is for my personal narrowband filters (Kayron from Light Vortex Astronomy). They are the Astrodon Hydrogen-Alpha (HA), Oxygen-III (OIII) and Sulphur-II (SII) 3nm 1.25" narrowband set. These are considered the highest-end narrowband filters money can buy, able to produce images of exceptional quality and incredible sharpness, cutting through a vast amount of light pollution. The 3nm variants featured here are fantastic for pulling out fine nebulous structures clearly above background. For more information, please see Astrodon's website: https://astrodon.com/products/astrodon-narrowband-filters/ Please note that these three filters together currently retail at just over £1,710 from UK suppliers, €2,180 from European suppliers or $1,690 from US suppliers. Payment is preferred via bank transfer but PayPal is OK with an extra 2.9% to cover PayPal fees. I'll cover postage to you via tracked Courier. I welcome any questions you may have regarding this listing. Thank you for looking.
  2. First view of the Sun for almost a month, but the wait was worth it. The large sunspot has split into 2 umbra, both within the same penumbra. Plage and filament activity nearby. There is a large prominence just above this on the oncoming limb and 3 other prominences on this limb. On the Western limb there is another even larger prominence. I will set up for WL and have a close look at the AR. Hope your skies are as clear as mine.
  3. Both little used, 'as new' condition, selling due to change of camera. Price incl. shipment: Ha: £99; CLS: £49 These are compatible with Canon 5D / 6D, etc, here are the links for details on these filters: https://www.365astronomy.com/optolong-h-alpha-7nm-narrowband-deepsky-filter-for-for-full-frame-canon-eos-cameras.html https://www.365astronomy.com/optolong-cls-city-light-suppression-filter-for-full-frame-canon-eos-cameras.html Regards, t
  4. Hi all, I use my Nikon D750 95% of the time for daytime imaging, so far I have done nightscapes of the milky way and recently I bought a Star Adventurer and have been really pleased with the results that I got with my Nikon 180mm f2.8 lens attached. I would also like to attach the camera to larger telescopes that my local Astronomical Society has. I am interested in increasing the Ha sensitivity, however I would like to continue using the camera for daytime imaging, I have read a lot of different posts here and other places and I'm still none the wiser. So far I have gathered that the IR filter is removed which sits in front of the camera's sensor and is replaced with a filter that lets through the Ha wavelength, however a custom white balance is required for daytime use. Does this custom white balance overly matter as it can be altered in Lightroom/Camera Raw? I also read that an external IR filter may need to be fitted to each lens (a bit impractical and is this only when the whole IR filter has been removed from in front of the sensor - full spectrum mod?).
  5. Evening SGL, hope everyone on holiday is having a good one! This is an image of M33 captured months ago. Its a collaboration with UK imager Matthew Foyle who provided the much needed Ha data to make the galaxy pop. I captured the RGB with my DSLRs in mid October, i used both a Canon 1100D and 600Da - dont ask why. Matt handed over some Ha data he captured last year at f8 but also went ahead and gathered some more at f5 for this project. I finally managed to get my hands on a Pixinsight license a few days ago and set about on the data. Excellent software, i'm not looking back. I've tried to produce a natural as possible image here, something i always messed up when using Photoshop as i always whipped out the lasso tool for selective adjustments ect. I've settled in to PI these past few days and i'm really starting to understand and enjoy processing a lot more, not that this is not possible in PS. As the title suggests, this was my first time getting my hands on Ha data and i did have to move over to PS to blend it in as i had no idea it is supposed to be added at the start of processing. I left it to the end and i couldnt find a way to do this easily in PI! Feedback is very welcome, especially regarding the Ha image Exposure:RGB - 63* 600 seconds ISO 800 f7Ha - 13* 1200 seconds f5, 15* 1200 seconds f8Total Exposure:19.8 hoursMatts GearScope: Takahashi FSQ106EDCamera: QHY9M cooled to -20Mount: NEQ6 Belt ModdedMy GearScope: Altair Astro 115EDTCamera: Canon 1100D, Canon 600DaMount: NEQ6
  6. After many many attempts due to bad weather, equipment failure and a strong urge to throw everything in the bin, i finally have something that resembles the heart nebula. In total its 10 x 900s and 12 x 600s subs with a Borg 89, ATIK 383 and baader Ha 7nm filter. Its stacked in PI using flats, darks and Bias, and a had several stretches applied, further processing required, but what? any ideas or pointers as to what to do next? deconvolution? who knows next year i may get the OIII data for this.... IC1805 Ha.tif
  7. Managed to grab some H Alpha and Ca-K data whilst out this morning. Pretty windy at times so quite (pleasantly) surprised how well these have come out. Proms in Ha & Ca-K 6 Pane Ca-K full disk AR12490 @ 2000mm focal length.
  8. Hi all Really really struggled to get this working in photoshop. I think I've screwed up the exposure on the prom capture so the disc ended up being a fair size larger than the surface detail which was always going to give me a bit of a halo around the image. Hope its not too bad but comments and advice are always welcome Taken with the Coronado Solarmax SS60 and PGR Grasshopper today, 700 frames proms, 1000 surface. Not much happening today when I took this which is a shame because I've just seen some cracking pictures of looping proms from yesterday! Clear skies all Cheers Will
  9. Hello all, I just got the O3 and the S2 filters this weekend after 2 months of waiting. I bought initially an Optolong Ha and I thought to buy the O3 and S2 also from Optolong. They O3 and S2 are advertised as being 6.5nm which also contributed to go for them instead of the Baader's. Anyway, I acquired some 3 hours if I remember well with the Ha in 1min subs and now just above 2 hours with the O3 in 3min subs. Unfortunately, I can image to the south only up to ~130 degrees in AZ. So the good skies around 180 degrees where objects reach the max altitude are not reachable from home. I have to give it a try later in spring from outside. All taken with the ASI 1600 MMC, cooled to -15C, put on the Tair3s wide opened at F/4.5. 300mm focal length. https://drive.google.com/open?id=0ByhJ_xuQxcnjWUZUZTRyRXFYYzA Will post in the evening the Ha and the O3 components which were mixed HaOO. Clear skies, Alex
  10. Hi all Just thought I'd put this out there to try and get some opinions. From time to time I've been imaging in Ha with a 2" Baader 7nm. It's fine except that I still get lp gradients which is very annoying. I'm wondering whether doubling up would likely help? There are the Astrodon 3nm or 5nm but they are fiendishly expensive, especially in the larger size. Any thoughts/experiences? I'm quite happy with what I can get with the the 7nm - it's just the lp.... Cheers Louise
  11. Hi All, First big thanks to Kev and Helen for some pointers on getting started. As always bang on the money. Ok, I borrowed a PST from Jon (Ford Prefect) for the transit and luckily got to try it out this morning. Good thing I did as I hadn't installed the DMK driver properly when reinstalling Win7 and the DMK doesn't focus with the PST at prime focus. I found an old 2 x barlow that had an unscrewable lens cell, I screwed that into the DMK which gives me a roughly a 1.4-1.5 image scale increase, but more importantly it will let me get to focus. The weather is not good here but focused as best I could (need more work on that) and I managed to get three AVI of cloud going over the sun. So this is the result. I've added the colour in Photoshop, I think that focus is off a little as I had to be quite brutal in Registax5 with the sliders... Any tips/suggestion gratefully received.
  12. A couple of firsts for me on this one. Narrowband imaging with a clip in Ha filter in modded 1100D. Also first time that i have reached 15min subs where i have been happy. The following image is just 3 x 15 min subs stacked, exported just the red channel in Nebulosity and a light dusting of levels and curves in Gimp. Also had lots of problems last night getting star allignment - Guess it was just as I was rusty. Last had the scope out in May!!! Cheers John
  13. Hello fellow gazers... I started shooting this one back on Feb 20, when i grabbed 11 x 1200s of Ha subs. 4 of the 11 were not of great quality, due to some light intermittent clouds, but i included them anyway in the stack (such is the trust i place in APP's 'Quality' algorithm). Then on March 3 i finally got another clear night, so while i waited for the sports facilities floodlights to switch off, i grabbed a short set of 20 x 90s RGB subs (just the D5300 with no filter) so i could use them for RGB stars. Then afterwards managed to grab 12 x 1200s of OIII subs. It's been a busy month (house move coming up) so i've only just got around to looking at it now. Processing this one has been a challenge. I wanted to push it hard, to show up some of the nebulosity that sits between the two nebulae, which meant the sky background became an utter pain to deal with. It was noisier than i would like, and still is, hence the need to use more noise reduction than i would normally. Having the stars in a separate layer is great, makes processing so much simpler. It has also improved my workflow i think, as i now tend to end up with an image that has 3 layers, Luminance, Colour, and Stars, rather than a single layer (which i sometimes would, due to laziness!). So now it's easier to go back and fix something later if i decide i don't like it. Full details: 11 x 1200s Ha (2" Baader mounted) 12 x 1200s OIII (2" Baader mounted) 20 x 90s RGB (for stars only) Nikon D5300 (modded) SW 80ED w FF/FR HEQ5-Pro Captured with SGP, pre-processed in APP, post-processed in PS. Ha assigned to Red, OIII to Blue, and Green was synthesized using one of Noel Carboni's actions in PS. I probably spent a good 10 hrs processing this one. Mostly due to trying to create a starless Ha image that was as clean as possible (which was a major PITA i must say!). Also, while the OIII signal was stronger than i was expecting for the tadpole nebula, it was unbelievably weak in the Flaming Star nebula. All i could get, after extreme stretching, was a small blob around the central section, so i gave up on the idea of using Annie's 'Hubble Palette Creation' Action and just went with a Bi-Colour approach. I might try the Hubble Palette just on the tadpoles at a later date, it should take to it much better. This one felt like a struggle, so i'd be grateful for any C&C, no matter how harsh. I think i have a tendency to go 'too far' in my processing, and i might well have done so here. Let me know what you think! Cheers!
  14. The Monkey Head Nebula The Monkey Head Nebula is an HII emission nebula located 6400 light years away in the constellation of Orion. The nebula is associated with an open cluster of mag. +6.8 located at its centre. With a diameter of approximately 40 arcminutes, the nebula is larger than the full Moon. There is much debate over the correct designation of this object as some sources cite the nebula as being NGC 2174 and some stating the nebula as being NGC2174/5. What is not in contention is that Stewart Sharpless logged this object as SH2-252 in his second and final catalogue completed in 1959. Personally, I go for the nebula being NGC 2174 and the open cluster being NGC 2175! It was and I guess still is, my intention to produce a bi-colour version of this image but the skies have not been kind and just the Ha displayed here has taken 5 difficult nights of cloud-dodging although in fairness, it has been CCD Commander and my automation project that have done most of the starting and ending of the sessions! I decided that with the weather currently deteriorating, I may as well post up the project thus far. Image Stats Mount: Mesu 200 Telescope: Sky-Watcher Esprit 150 Flattener: Sky-Watcher Esprit specific Camera: QSI 683 WSG-8 Filter: Astrodon 3nm Ha Subframes: 22 x 1800 sec Ha Integration: 11 hours Control: CCD Commander Capture: MaxIm DL Calibration, Stacking and Deconvolution: PixInsight Post-Processing: PhotoShop PS3 Full Resolution version Location of the open star cluster NGC 2175 Visually This target lies 2.3° to the southeast of mag. +3.3 Propus and is a two for one object, comprising an open cluster (NGC 2175) and an emission nebula (NGC 2174) although most astronomers associate the nebula with NGC 2175. Lying in a rich star field, the almost circular shape is punctured by a dent in its western edge which stands out particularly well in images and helps to form the ‘monkey-head’ shape from which the nebula gets its common name. Inboard of this dent towards the east is an area of intense star birth. You’ll need a very large telescope to discern the shape of the nebula but a 4- 6-inch telescope will show the open cluster very well. Location of Nebula and associated Star Cluster RA: 06h09m 36.0s DE:+20°29'00" Star Birth Region On the eastern limb there is a dent pushing westward into the nebula and here there is a huge stellar nursery that featured in the Hubble Space Telescope’s IR image (http://hubblesite.org/news_release/news/2014-18) released on 17th March, 2014. The nebula is comprised mainly of hydrogen gas which is ionised by the intense ultraviolet radiation emitted by the hot young stars within the nebula. This ionisation causes the hydrogen to glow red. Also associated with this nebula are some faint regions of reflection nebulosity giving a hazy blue appearance and some relatively faint dust lanes add interest to the interior.
  15. Hello all! I acquired yesterday the third hydrogen panel of this area. I might add 2 more below, in landscape. We shall see how the weather plays. 2.5h each panel in 300s subs at unity gain. And some 30s exposures for the core. Camera is ASI1600MMC on the Canon 300 F4 L lens, cooled to -15C. And first successful try with the Astro Pixel Processor, though, the stacks were made with DSS. I just purchased APP and I didn't restack them. I'm not sure if I should add more hydrogen data or move to oxygen and then LRGB. I still have time to decide until Feb-March. More details: http://www.astrobin.com/317154/ Comments welcomed. Clear skies, Alex
  16. Hello all, I started a while ago a topic to show my progress on this target over a couple of years. Now I think I have a final image for this season. I will have to move soon and the clouds don't seem to let me see it again until then. Maybe if I get to travel to a dark site, but then I will go full resolution. Equipment used is a 130PDS with SW coma corrector, ASI1600MMC camera cooled to ~-15C, put on an AZ-EQ5, guided with OAG. Guiding accuracy was reported between 1.3" and 2" depending on the seeing. The window frames only allowed me to see the target for ~2.5h/night. Some nights had clouds, some not. Luminance was taken during 6 or 7 nights for a total of 156x180s frames at unity gain, through a visual CLS filter. That means 7h 48min. The visual CLS seemed to provide better results than the L (IR/UV cut) filter and the coma corrector didn't seem to add chromatic aberrations. Each RGB channel is made by ~60x60s at unity gain too. Ha, if I remember well, is just above an hour worth of 60s frames at 300 gain. I resized the images to 50% since they didn't provide more detail at full resolution due to poor seeing. Processing was done with StarTools and GIMP. Some star reduction. Red/white light pollution. If I missed other significant details that you're interested in, please tell. 16bit .png here: https://drive.google.com/open?id=0ByhJ_xuQxcnjWHU1RWM0OVFmNG8 Or astrobin: http://www.astrobin.com/313011/ Thanks for looking and clear skies! Alex
  17. Sadly, this project is currently stalled by the atrocious weather but at least I have had one uninterrupted night of imaging to start the ball rolling! I'm aiming for a bi-colour rendition combining Ha and OIII data at 3nm. I have a lot of data capture to go but it's a fair start. Image Stats Mount: Mesu 200 Telescope: Sky-Watcher Esprit 150 ED Pro CCD Camera: QSI 683 WSG-8 Sampling: 1.04”/pixel Guiding: OAG/LodeStar Filter: Astrodon 3nm Ha Exposure: 10 x 1800 sec Date: 31/07/17 Calibration: Bias, Darks & Flats Full Frame Cropped Frame
  18. The Sun in Ha 12 Apr 2018 Reasonably quiet, 3 x small filaments across lower part of disk, some prominences on one limb and a new active region showing a sunspot near the upper left limb ... Tho a cloudless sky, the seeing conditions were pretty poor Lunt LS60THa and ZWO ASI1600MM haven't done any imaging for just over a month. Now that daylight saving has finished, the sun is too low to image by the time I get home from work making imaging reliant on clear days in the weekends I have been off work all week with Bronchitis and managed to get the scope out today cheers Dave
  19. Hi guys With the weather here in the UK being so bad recently, and with work commitments and other boring life stuff going on I haven't done much imaging lately, but I did finally manage to get out and grab some OIII data a couple of weeks ago to go with my old Ha data of NGC 1499 from back in September. The Ha data was from first light for the newly modded D5300 and Baader Ha filter. We have an outdoor sports facility only a couple of hundred yards from our house, and annoyingly the ridiculously bright floodlights don't turn off until after 10pm on weekdays, so even though there was no moon to contend with, I had no choice but to wait until the lights were off before I could start shooting the OIII. I thought about shooting more Ha while I waited, but in the end I decided to shoot some short subs without any filter, just to use for RGB stars. I stupidly didn't use my IDAS-D1 filter, and the scope ended up pointing almost directly at a streetlight for all the RGB subs. The result was a stack that had a simply insane gradient running through it, and which made gradient reduction on the stack impossible, as it was changing so much between subs. In the end I had to run gradient reduction on each individual RGB sub before stacking, and then run it again afterwards! Thankfully I only shot 20, so it wasn't too laborious. In the end I had something which, despite having a really ugly background, did at least have useable stars. As for the OIII, boy was the signal weak with this one. I'm used to dealing with weak OIII signals on the D5300a, but this one really took the biscuit! Thankfully J-P Metsavainio's tone-mappng technique allows one to get the sledgehammer out for such cases, so I was able to stretch it far enough to get something out of it (even if it doesn't yield any fine structural detail for the OIII). So this is 23 x 8 min Ha, and 9 x 20 min OIII subs. Calibrated with Flats and Bias, and dithered aggressively. The stars are made up of 20 x 90s subs. Everything shot at ISO 200. The usual gear was used, HEQ5 Pro Mount, SW 80ED (with FF/FR), guided with PHD2 and a Finder-Guider and Legacy QHY5. Captured with SGP, pre-processed in APP, and processed in PS. I have to say, I really like having the stars in a separate layer in PS. So much so, this is how I'm now going to process all my images from now on. It makes things so much easier being able to adjust whatever I want and not have to worry about constantly protecting the stars. I'm not actually finished processing this one, but I thought I'd post it up for now anyway, and update it later. I still haven't ran any noise reduction on it yet, so I need to do that next, but hopefully the final version will not look much different to this. I did have some fun playing with the colour on this one. I have noticed today though, that it looks quite different on my work Dell monitor compared to my cheap Korean one from home. I think it looks a bit duller today, but I'm just not sure! What do you guys think, does it need more or less of something in particular? All comments welcome, I'm always looking to learn! Cheers all!
  20. I recently bought an Astrodon 3nm Ha filter for my new mono camera. It was half price so I couldn´t resist and 2 nights ago I got to try it for the first time. Yep, it delivers! The image was a breeze to edit. The only thing I have to fix is a backfocus issue (I think) that gives me elongated stars in the corners. So, this is 44*5 minutes with the ASI 1600MM-Cool and the Astrodon 3nm hooked up to a Samyang 135mm lens @f/2.8. My guider malfunctioned so I thank the short focal length for allowing me to shoot 5 minute subs Can´t wait to catch some OIII to make a bicolour version! Oh, I forgot - no darks, flats or bias frames used since I haven´t made them yet
  21. The Horsehead Nebula (B33) The Horsehead Nebula (Barnard 33) is one of the best known nebulae in the night sky but few astronomers have actually observed it through a telescope. The reason for this strange state of affairs is that the nebula is very dim as it is, in essence, just a pillar of dark dust and gas – in fact we can only see it because of the curtain of relatively bright Hydrogen Alpha (Ha) emissions (IC 434) behind it. This weekend several observers have seen it for the first time through a combination of excellent conditions - especially last night (25th/26th November) - and pure dogged determination to observe it. My hat is off to these intrepid observers who have persevered to achieve that goal. I on the other hand turned to the ‘Dark Side’ to achieve the same goal capturing my data over 2 nights, the first killed part way through by mist and cloud and the second (last night) working very well until a miscalculation in my image scheduling meant that the observatory closed down when it failed to maintain its guide star while imaging through a tree – Doh! Barnard 33 is a dark nebula situated in the Orion Molecular Cloud Complex in the constellation of Orion. Situated underneath the mag +1.74 ‘Belt Star’, Alnitak, this nebula is very well named as in images, its shape representing a horse’s head is clearly identifiable. For me it actually looks closer to a sea horse in appearance but the shape of a horse it most certainly is! Image Stats Mount: Mesu 200 Telescope: Sky-Watcher Esprit 150 Flattener: Sky-Watcher Esprit specific Camera: QSI 683 WSG-8 Filter: Astrodon 3nm Ha Subframes: 15 x 1800 sec Ha Integration: 7.5 hours Control: CCD Commander Capture: MaxIM DL Calibration and Stacking: PixInsight Post-Processing: PhotoShop PS3 I have deliberately taken a 'high key' approach to processing this data to release some of the additional detail often lost in the foreground region below the Horsehead Nebula itself. The Horsehead Nebula - B33
  22. I present you an image of the Flaming star nebula and the Tadpoles. I have 2 versions. Ha only and HOO. I started with 4 panels mosaic shot with the 130PDS, each panel is ~2h exposures. Then I shot another 7.5h with the Canon 300 F4 L lens, but the result was awful, compared to the mosaic. So I added this only in a small amount and only on the darker areas of the image. For the O3 image I only used the Canon lens. The IS element inside gives me a lot of headaches, and I have coma in some corners, other corners are out of focus, etc. And it behaves differently each session. Not only the IS was not playing nice, but I also had focus shift due to temperature drop and I did not refocus. The camera used was the ZWO ASI1600MMC, cooled to -15C. 180s subs at 300gain with the 130PDS and 300s subs at 139 gain with the Canon lens. Mount: AZ-EQ5. The lens was wide opened and the newton was corrected with a SW coma corrector, hence the halos around the brighter stars. Guiding: OAG with 130PDS and side-guiding with a 200mm lens for the Canon lens shots. Software: APT and PHD for acquisition; DSS, APP, StarTools, Registar, GIMP for processing. When blending the O3 I had to abuse star reduction, star removal, heavy blurring, masks, layers, etc. for a decent result. Link to a better resolution and other details: http://www.astrobin.com/315278/D/ Thanks for watching, Alex
  23. ...holy poop! OK, so I waited.... and I waited.... and I waited.... I waited until the arms of Morpheus were closing on me. Finally, I just set it and forgot aboutit. I figured I could clean up the mess in the morning, or delete it. But then I thought, maybe this could be of some use to somebody in some small way.... PHD2 decided to flat line after doing my sequence triggering. Unusual behavior, but PHD2 did a flat line with a few intermittent spikes above or below the center (zero) line. Rather than continue fighting with it, I decided to test what Stellarium would do as a stand alone. A while back, I was doing some testing of my USB and WiFi MoJo and discovered Stellarium will actually make my mount follow the target for hours on end. Last night, I decided I was too tired to be bothered with it and let it run to see what would happen with Stellarium running. When I discovered Stellarium would do rough guiding on it's own, I messaged Alex, one of the developers, and asked if Stellarium could guide like PHD2 can. No was the answer. But I always wanted to test that because there is a centering icon that puts a selected target in the center of the screen. And in my observation, seemed to continue to hang onto it. So Phd2 acting up, Sleepy, I decided to go to bed and let it run. Normally I'd delete something like this. But thought it demonstrated a bit about Stellarium's guiding. In my opinion, I think Stellarium could singlehandedly work for visual observing. The below GIF file comprises about 6 hours of imaging. I vill be bach. Here's what happened: 01-07-2017, overnight. Now, I've been working on these GIF files since I discovered I could put a twinkle in my pictures. But the above was a run-away due to some anomaly with PHD2. It also shows the hot pixels that are the bane of my G3 camera. I refer to them as "The Rainbow Sprinkles". Filtering the noise in Adobe Photoshop Elements 12 turns the RGB dots into white faux stars. But they are fixed, and I haven't figured out how to remove them entirely, only to bleach them white. Hopefully one day I can shave these off, or finally afford a better camera. Last night I got things straightened out, my object came naturally centered, miraculously I got a better focus, And I got a nice pile of images to play with. 02-07-2017 Now if anyone is interested in this, it is a sequence of images gathered overnight with a guided telescope/mount taking long exposures. After processing, I save my series as JPG's, then assemble them in an online program called http://gifmaker.me/ Adjusting the time effectively adjusts the Frames Per Second. But you have a better control, IMHO, with the time per image presented. I assemble my images 1,2,3,...16,17,18,17,16,15...3,2,1. That gives the visual of the GIF running and makes the "twinkle" in the final file. Fun to do, and fun to play with. Give it a try with some sequential images of your own.
  24. Hi, here is a quick 10x 300sec in HA on the NA nebula and the Pelican. Not sure if the framing is good but it came out ok. Clear Skies Paul
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