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Found 23 results

  1. I scrapped all the Oiii and Sii data I previously took during a full moon (about 15 hours worth) and retook it all when the moon was a bit smaller at 76%. Ha was taken during 98% and 67% moon. All the lights were taken on the following nights: 12th, 19th and 20th September 2019. Integration times, all in 600s subs unbinned: Ha = 28.33 hours Oiii= = 5.67 hours Sii = 5.67 hours The Ha data is really nice, and unsurprisingly the Oiii and Sii is not as strong (or nice). I'm missing that (vital) step in my processing routine of getting the Sii and Oiii properly stretched to match the Ha, before combining. I dont really know how to deal with the weaker data properly. Any pointers would be appreciated. What I do currently: All the data is loaded into APP into separate channels/sessions. The data is stacked and registered against the best Ha sub This produces individual stacks of Ha, Sii and Oiii that are all registered Each channel is processed with DPP in APP and then saved as a 16bit TIFF Each is opened in PS Stars removed with AA and any remnants removed and tidied up I then open a blank RGB document in PS I paste Ha into Green, Sii into Red and Oiii into Blue Adjust the selective colour settings to get 'Hubble palette' Adjust levels, curves, saturation until looks ok All the Ha Sii Oiii data is then combined together in a single 'super' stack in APP using quality weighted algorithm to create a 'luminance' That luminance layer is adjusted using levels, curves, and NC tools such as local contrast enhancement and deep space noise reduction (using masks to apply as required) The luminance is pasted onto the above colour layer, and incrementally added using gaussian blur Cropped and saved. Here it is anyway I haven't intended on any more exposure time for this one, but will consider it, if the expert opinion dictates otherwise! CS Adam
  2. 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.
  3. Hi guys, its me kronos, and i am about to purchase a new a new filter for my 5” and 8” scopes. I cant decide wether to buy a UHC or an oiii filter. my budget it 70euros max And i have settled between the uhc explore scientific or the oiii explore scientific. i am open to other suggestions in this price range i am keen to observing more deep sky objects with better detail Whichever filter i wont buy now, i will buy a better one in the future(for example if i dont buy the uhc , i will buy an astronomic uhc in the future) So far i have loved the views of m42 (i have observed many more objects)and now thats its fading into the suns glare, i m starting to find more and more objects.Hoping to observe the veil and the lagoon nebula as long as some planetaries and definetly globulars(which i ve heard that they dont take filters(am i correct?). I ve heard that the oiii enhances contrast and dims the object, but is the dimming worth the additional contrast from the uhc? i havent yet observed my first planetary , but i am planning to soon.I m really excited to see one! I will make another thread similar to this then,asking questions that may arise and reach a conclusion. I wrote this thread to ask about your preferences with filters(oiii or uhc) and for advice on what i should buy according to the objects i want to view) thanks, any advice will be useful. kronos Clear skies.
  4. Hi all. Pondering getting a decent OIII filter to use, but will I see any benefit really in my main ST120 frac at at which is my main scope I use? From what I've read it is 6" and above scopes that benefit from the filter, so this may show promise in my Celestron C6-N reflector perhaps. Any experience/views from anyone who may have an ST120 or C6-N scope would be welcome, and also I've heard that the astronomic OIII filter are very good, so any advice as to which are good/bad makes would be great too! Thanks! Oh! Suffer from moderate LP where I live too, and have a UHC Explore Scientific filter already.
  5. Hi there, I'm hoping to buy an OIII filter for astro-imaging and i've read a lot of halo related posts and am unsure which to go for. Are the Baader OIII now halo-free? it sounds like OIII are notorious in general for halos and i want to be reasonably sure before i hand any money over. My astronomik ha 1.25" shows bad haloes, but the clip version doesn't although that one is newer. Will the astronomik OIII clip be halo-free? I am unable to reach the budget necessary for Astrodon, so i'm thinking the next best will be either Baader or Astronomik, is this pretty accurate or am i missing a manufacturer? Many thanks for any assistance in advance!
  6. 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!
  7. 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!
  8. Aenima

    wizardHaOiii

    From the album: CCD venture

    A h-alpha and OIII shot of the Wizard nebula NGC7380. Processed to resemble the hubble palette colour scheme. ED80 - ATK16HR - Ha clip filter - EQ6 - finderguider 9x50mm PhD2 - photoshop - DSS.
  9. From the album: Widefield DSO

    Veil taken with EQ6 guided, Sigma 120-300 f/2.8 OS. Canon 450D modified + Astronomik Ha 12nm filter. Canon 600D standard + Astronomik OIII 12nm filter. Main processing by PixInsight. Finishing touches in Photoshop Elements.
  10. Hello all, I recently collected some OIII data for my previous attempt of the Elephants Trunk. I used a 2" Astronomik 12nm filter inside my TS Imaging Star 71, riding in my dual imaging rig. I knew it would be very difficult to point the TS71 correctly and frame the Trunk with the OIII filter blocking so much light, so I was lucky to have this method which put it spot on target. I added the OIII data as a "lighten" layer to the original blue channel, then used some "selective colour" etc (alignment was done with Registar). The new image is a bit dark, I know, but that is intentional and I think it works well if watched in low ambient light. C&C most welcome. Used Nikon D7000 & NexGuide on HEQ5 Pro. Ragnar
  11. Heres an image from a few nights ago (8th) of a section of the Veil nebula. exposures were not as long as I would have liked due to cloud passing over, conditions were very average. This is a bi-colour image taken through the skywatcher mak Newtonian scope, an Atik 314L plus mono, with a 7 nm h-alpha filter, and an OIII filter. the h-alpha filter was 10 x 5 mins exposures, and the OIII filter was 9 x 5 mins.
  12. From the album: Widefield DSO

    Veil taken with EQ6 guided, Sigma 120-300 f/2.8 OS. Canon 450D modified + Astronomik Ha 12nm filter. Canon 600D standard + Astronomik OIII 12nm filter. Main processing by PixInsight. Finishing touches in Photoshop Elements.
  13. From the album: Widefield DSO

    Still learning how best to use the EQ6. Test shot of Veil nebula with Canon 600D (unmodified) and 70-300L lens at 300mm f/5.6. Astronomik OIII 12nm filter. 7x 8m subs.
  14. From the album: Messier and NGC Objects

    7 x 600second Ha 10 x 600second OIII 10 x 600second darks Skywatcher 130pds, HEQ5 QHY Img2pro 6nm Ha Astronomik Clip filter 12nm OIII Astronomik Clip filter

    © A.Woodward, 2016

  15. This is my first time taking ha and I was wondering if I need more integration time? I also don’t know how to process to well. I am hoping to add OIII but I don’t know if this is a good enough ha image. Any suggestions? 50B40027-8E6A-465F-92C5-E297FDC910C4.tiff
  16. I am looking for some ASTRODON filters, 1.25", Ha and/or OIII, 5nm and/or 3nm.
  17. From the album: DSO, Nebula, Galaxies, Comets etc

    M1 The Crab Nebula 30.12.2016 Taken using Atik 314L monochrome CCD and Celestron 8SE SCT telescope 10 x 300 seconds H-alpha, 10 x 300 seconds OIII and 10 x 300 second darks Narrowband data assigned to colour channels to give a bi-colour image and lightly processed in PS

    © vicky050373

  18. Hey-ho So then, just as i thought the DSO season was well and truly over for me until late August/early September, as it turned out last Saturday night (May 5th) was mostly clear, so i set about trying to finish the NAN image i had captured in Ha a while back (see thread below): So all i needed was some OIII. It's obviously not the ideal time of year to capture this i know, as it's so low on the horizon, but beggar's can't be choosers so i tried my best to make the most of the small amount of astro dark time available and just make the best of it. In the end i managed 9 subs, two of which were sub-standard due to passing clouds, but as is my want these days i still asked APP to stack them (using the Quality setting) and it didn't seem to affect things. So in total this is: Ha: 7 x 480s, 6 x 1200, 13 x 1200 (a little over 7 Hrs) OIII: 9 x 1200s (3 Hrs) RGB (with IDAS-D1 filter): 20 x 60s The usual Flats & Bias, stacked in APP and processed in PS. Gear used: Nikon D5300 (modded); SW 80ED (510mm FL); HEQ5-Pro; SGPro and PHD2. The RGB subs were used solely for the stars. I still need to get better at merging them with the NB channels, i'm not as good as i'd like to be at controlling them. Although in this instance, i did mask the stretching of them, and it definitely helped, but i need to practice this to get better at it. I think the fact that the RGB stack (even at just 20 mins) contained some nebulosity didn't help things. When it's just stars and nothing else, it's so much simpler to combine them. So this is just a Version 1 for now (i'll try an sSHO next). I used Ha for Red, OIII for Blue, and used one of Carboni's Actions to synthesize the Green channel. Then went round and round in circles trying to find a colour balance to my liking (on my rubbish monitor!) so i'd love to hear what you guys think. Too dark? Too much saturation? (i tend to do that, lol). I also couldn't decide on orientation, so have included two different ones. Which do you guys prefer? All C&C welcome. Don't hold back! I'm always looking for ways to improve. Clear skies!
  19. I am relatively new to narrow band imaging, the processes, techniques etc - so the Crescent nebula I set as a goal as it was something I had VERY faintly seen through an eyepiece a few years back and wanted to really "see" it in detail via camera. Shot over the past several days, I managed to get enough data to produce a hopefully reasonably presentable image. 24x600s Ha exposures (4 hours) 19x1200s OIII exposures (6.3 hours) All binned 1x1 using an ATIK414ex, Baader filters, and my Meade LX90 8" SCT, reduced to f/6.3 So whilst this is the longest project I have yet undertaken and managed two channels of data, I know that more data is always better, so I started shooting more OIII last night to add to the image. I checked focus and found that I was off, so refocused and started shooting, dragged the first FIT in to DSS's file list and registered, it scored WAAAAY more than the previous nights data, so much more, that I am now replacing the previous nights data and not adding to it, so the following image has less OIII (7x1200s), but the stars, well they're sharper. Typically clouds are now due, so adding data back to bring it to atleast 24x1200 is frustratingly on hold, and ...yeah the halos will be removed, turns out my optics are great at smearing blue data. Comments and critique welcome. On a personal note really glad I went and got on OAG a few months ago, my total error last night was down to 0.65" - image didn't translate all night, so have a spare Orion ST-80 now!
  20. Acknowledgement: Many thanks to Professor Karen Kwitter at Williams College and Dick Henry at University of Oklahoma, for kindly giving their permission for using their extensive meaurement shown here http://web.williams.edu/Astronomy/research/PN/nebulae/search/index.php#galactic_milky_way This guide is free for personal use, any further distribution needs to attribute to the source of the above webpage. Some basics about the nebula filters: There are 3 most often used nebula filters, i.e. UHC, OIII and H-beta. The light spectrums in consideration are 486nm(4860 angstroms), 496nm(4960 angstroms) and 501nm(5010 angstroms). UHC: transmits all 3 light waves OIII: transmits only 496nm and 501nm H-beta: transmits only 486nm Scores for filters: 5 and 4 are Best depending on the flux measurement (High measurement in x10-12 gets 5, while high measurement in x10-15 gets 4), 0 and 1 means worse than without filter, also depending on the flux measurement, finally 2 and 3 means better than without filter. Summary: Of the 171 Nebulae, OIII performs best on 146, UHC best on 28 and H-beta on 10. There're some more commonly observed nebulae not in in the list though, such as B33, NGC 1499, 6960, 6970, 6979, 6992, 6995, 1976, 1982, 2024, 2175, 7000, IC 1340, IC5070, IC5146, IC405, Sh2-155, Sh2-273, etc Nebulae_spectrum_and_filters_ST.xlsx
  21. Hi all thoughtt i'd capture the OIII data for my Dumbell image tonight. I was very lucky towards the end of the run as cloud came flooding in but for some strange reason didn't invade my ounce of sky, despite most of the rest of the sky being covered.. Lucky me!! So.. Taken through the 127mm Apo, guided by the 102ED and imaged on the Atik 428EX through an Astronomik 12nm OIII filter. 120min of data in 12 x 600s subs, binned 2x2. I shall be grabbing much more data in all channels, but i think this is a pretty good start for now, albeit slightly out of focus... Not doing too bad after having about 18 months out. Rich..
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