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Showing content with the highest reputation on 03/02/21 in all areas

  1. Imaged from Spain, The Lion Nebula taken with the William Optics FLT132 at f5.6 and the QSI-660WSG Done in the usual Hubble palette. 2.8hrs in Ha and OIII, 3.5hrs in SII, just over 9hrs total. Processed in Pixinsight and Photoshop. Thanks for looking Peter
    21 points
  2. Last week saw some clear skies, even though the Moon was a bit on the bright side, and I managed to get in some imaging time with my new camera. I'm still very much new to the CMOS OSC camera so more time is needed to fine tune the settings. This is the best of the weekend's images and is 68 x 180 second subs at 120 gain, using flats, dark flats and darks. Stacking in DSS with post-processing in PI. Mount: SW EQ5 Pro Scope: SW Evostar 100ED DS Pro with 0.85 reducer/flattener Camera: ZWO ASI294 MC Pro Cooled to -10°C with only a UV/IR filter and imaging through APT
    20 points
  3. Close up of the Horsehead Nebula, tricky being a dark object against, well more dark space. I originally took 12 exposures and just wasn't enough so added more back in 2016. processed today. The swirly rings are from some reflections, The old coatings are degrading on the scope which doesn't help but not too distracting. Taken In HA though an old Meade LX6 8" f6.3 sct reduced to f5. 31x600 second exposures Arik One-1 Baader 7nm HA. #atikcameras #meade
    17 points
  4. Horsehead and Flame nebula in Orion. Taken last year but only processed today. It's 21 x 600 second exposures (3.5hrs) Baader 7nm HA, Atik one-6 camera, Meade 127mm s5000 triplet. #atikcameras #meade
    10 points
  5. For those that are not aware, the latest incarnation of Affinity (Beta) can now stack .FITS files as well as the usual RAW, jpeg etc. There is also a background reduction tool. The stacking options are a bit limited at the moment but I can see that these will be developed further. You can get the Beta version from the Affinity Forum but you have to have a license already.
    7 points
  6. Just going through the old back-up drives on a wet Saturday afternoon... Came across these pics from our holiday to Japan, back in 2016 that I never posted to SGL - meant to... better late than never! Japan was always somewhere I'd wanted to visit back from the days in art college. The graphics, comics, cartoons, culture, video games (that Designers Republic work done on the Playstation game 'Wipeout', will always stick in my designer memory, it was so modern and out there, so non-Western) and import consoles. Reading in awe about that 'Akihabara' electronic district (sound
    7 points
  7. Hi, The Rosette nebula and NGC 2244 using an Esprit 120 with a ASI071MCPro, a quad filter and a Orion 0.8 FR. I managed to get 8x300s lights of which only 4 did not have clouds. I did manual stacking in PI and some basic processing to get to the image below, which is not perfect, but it is much better than I anticipated with 4 frames. With so little data it is really mad to do what I did but the seeing was good and the individual frames look promising. I'm very pleased with this camera. The Orion 0.8 FR is great but not perfect. I'm waiting for the dedicated FR for the Esprit.
    7 points
  8. In another thread we touched upon concept of telescope MTF and instead of further discussion in that particular thread - we decided to open a new one - dedicated to understanding of: MTF and how it relates to resolution, detail, sharpness and contrast. These terms are often used to convey telescope performance and for that reason I think it is important that we are all on the same page when using these terms. I'll kick off discussion by saying that above terms are somewhat synonymous when we talk about telescope performance and are all "encoded" in MTF. Discussion such as
    6 points
  9. Last year was not the best in terms of total number of subframes I was able to collect, but still, I captured a few galaxies. Most of them are well known or very well known targets. But maybe one or two are a little bit more exotic All images were captured in my backyard telescope under moderately light polluted sky. Equipment: Meade ACF 10" f/10 with Astro Physics reducer, QHY163M with Baader filters and EQ6 mount. Stephan's Quintet. Conditions were decent - good transparency and good seeing, but the weather did not allowed to capture more data. So the total exposures are L 120x2 minute
    6 points
  10. Finally after two days of "your local depot has recieved this item, its being delivered today" from Royal Mail. Rigel Quikfinder and BST 8MM of course my local weather app is suggesting clouds for the next week and a half so thats about right.
    6 points
  11. A new wider Geoptic transport case has been purchased for my bino gear. It was on offer when i brought it late last year, but it seems the price has shot up since ? (internal measurements 80 x 37cm approx) https://www.astroshop.eu/multi-purpose-cases/geoptik-eph-30b082b-transport-case/p,55630#tab_bar_0_select Contents : 2x + 4x Powermates, 2x Docter 12.5mm UWA, Max 2 & MkV bino's 2x 12mm & 15mm APM Flatfields, 2x 19mm & 24mm Panoptics, Baader Amici , 2x Baader 2" prism diagonals
    6 points
  12. Yesterday I spotted a brief gap in the rain and clouds around 8:30pm. I keep my 20x80 ready for such opportunities so I went out. There was no time for even a monopod as the clouds were literally racing across the sky. I sat in a reclining chair and balanced the weight of the bins on my eyes looking up at Cassiopeia (the only patch of sky which was clear for longer periods). I spent about 30 mins outside with interruptions from clouds but I'm happy that I revisited many of my favourite clusters in this rich constellation. So I decided to write a short (and not at all comprehensive) tour o
    5 points
  13. Slight improvement over my previous horsehead but still lacking OIII. That will do for me. The clouds have beaten me ! Roughly 2hrs each channel HA SIII OIII
    4 points
  14. Here are results of 4" and 5" ideal clear aperture telescope vs 12" 1/5.6 PV with 20% CO and diffraction limited 12" 1/4 PV with 20% (I threw in diffraction limited scope in 12 for comparison) MTF diagram - black is 4", blue is 5", red is 12" 1/4PV and orange is 12" 1/5.6PV Top row: 4", 5", bottom row: 12" 1/4PV, 12" 1/5.6PV
    4 points
  15. Well.... after trying so many eyepieces, I’ve lately been finding new homes for all the ones I’ve let go. Hopefully anyone who’s had one/some from me is enjoying them. My main aim was to get the set to a usable minimum and spend less time changing them in and out of the focuser. My set is now just 6 eyepieces that work well in both my 4 inch frac and my 8 inch reflector. I think these are all I should ever need
    4 points
  16. 200 of 1000 frames stacked in AS2 and prodde and poked in PS The 2.5 powermate had a little venture out into the sun today for the first time on the 178 cam, might be a bit early in the year yet. do the clicky thing for full res.
    4 points
  17. Thought I'd give a higher spec version a go Digi AnywhereUSB/2 plus to hang the USB skycam from and just maybe get a more stable fast frame rate (as in >10fps) than the low-cost Maplin 4-port USB1/2 hub that is doing that job at the moment. These are usually pricey but managed to pick one up for a good price, had to buy a 5v 4A psu for it but they aren't expensive and both arrived in sync. Usefully I can load both the Digi drivers and still use the Maplin Elite Silicon one on the same PC so will be easy to flip-flop between them.
    4 points
  18. That’s what I do with a 30mm ES ep I have. Worth a try, no point in forking out if you don’t need to
    4 points
  19. ...I am not using the QHY filter wheel like the other guys with this camera so just wanted to share my initial experience. I already own an Atik EFW3 2 x 7” and unlike the QHY version i can’t bolt my wheel to the camera. I’m attaching it via an M54 to M42 threaded adapter (with an M42 to M48 adapter on the M42 male thread of the EFW). The back spacing for Epsilon 180ED is 56mm to the M54 corrector and I’m allowing another 0.7mm for the filter glass, so I’m aiming for 56.7mm The M54 to M54 adapter I have is 8.7mm thick, added to a 22mm EFW3 gives 30.7mm,
    4 points
  20. Speak up Robin, we can't hear you !
    4 points
  21. MTF ? Modulation Transfer Function I think that is all that I can contribute to this
    4 points
  22. Forgot also this book "15 Million Degree's" arrived today. Hopefully get some sun, lol.
    4 points
  23. A step up ring arrived today. Nothing special but I needed to have a 0.5 reducer for full disk with the 80ed and Zwo ASI camera and the baader Ca-K filter. Had to cut a mm down the ring as I couldn't get hold of the right size. It works a treat, now need to give it first light to see if the spacings are right.
    4 points
  24. Hi all, First off, I'm a long term viewer of these image forums. Some of the images you all submit are truly amazing! I'm no where near able to take shots like this yet - don't even have a motorised mount yet, but I'm slooooowly saving up for one!! I have been furloughed for Lockdown 3.0, and while I sit with my son while he home schools, I have been working through various online courses. One of them is on the OU, and part of the course allows use of their COAST telescope in Tenerife. Its a 14" Celestron on a 10Micron GM4000 mount. Camera is a Proline KAF-09000. I have carried out a
    4 points
  25. This is a two-panel mosaic from three recent nights taken with the RASA 8 and ASI2600MC (79 x 5 min so 6.6 hours). The moon was up and just about full so I used the IDAS NBX filter, making this is a Ha and Oiii image. I enhanced the details of the main nebulae with a bit of Esprit luminosity data that I had from last season. I agree with @ollypenrice that this should be within out artistic freedom. All well known nebulae in Cassiopeia but not that often seen together. I like the band of dark nebulosity cutting through the image. If you want to know what is in there I include the plat
    3 points
  26. I hadn't been expecting a clear sky last night, but we got one for a couple of hours that gave me the opportunity to quickly set up the Star Adventurer in the back garden. It was a little hazy, in Bortle 4/5 skies, but I managed 76x 1 minute subs with my Canon 6D and Samyang 135mm lens at f/2.8 and ISO800. I captured some darks and flats too. Stacked in DSS and processed in Photoshop. I would like to go deeper on this object, particularly for the "muckiness" in its locality, but as a starting point I'm reasonably happy. Deep sky isn't something I've done a lot of, but it's nice
    3 points
  27. M31 was the object for my first light with the RASA 8 and ASI2600MC back in August. Last night I finally got around to collect some Ha for it. Collected with a dual band filter (IDAS NBX) but I only used the red (Ha) channel. The data was added to the red channel in the RGB image as blend mode Lighten in PS. I think that the Ha clearly lifted the colours of the galaxy in a pleasing way. For the RGB data I have tried to tame the enormous dynamic range of this object so I could both bring out the outer dust "cloud" (presumambly made up my stars) that is often missed (or outside the FOV) as
    3 points
  28. Some recent captures. The latest being an hour and a half on Orion from bortle 8 skies. Frooby
    3 points
  29. Tonight it is the turn of my 130mm triplet refractor to try and split Sirius A & B. I particularly wanted to compare the performance of 2 diagonals at this task - an Astro Physics 2" Maxbright and a Baader T2 Zeiss prism. The seeing is quite steady although there are bursts of scintillation of Sirius from time to time with more settled periods of a few minutes in between those. I was able to see Sirius B, the Pup star, for short periods at 300x magnification using both diagonals. On this particular occasion, neither the prism or the dielectric mirror seemed to have any advan
    3 points
  30. Thanks for all the advice, it's really appreciated and has helped me towards some decisions. I think I'm going for the NEQ6 Pro or maybe a EQ6-R Pro if I can re-budget (or re-re-budget ). I feel this will be an investment that I hopefully won't need to change for a long time, regardless of scope or AP. Now the scope. I suppose I might be better off with a reflector of some sort, but I can't shake this bug for a refractor. So, the 120ED DS Pro it is. Now, I found out last night that you can actually get home observatory domes!!! I'm already formulating some plans to modify the s
    3 points
  31. Not really. If they are close in aperture size - like 4" and 6" - then optical quality and central obstruction plays a part. But once aperture is large enough and both scopes are diffraction limited - aperture wins in cases where there is no atmospheric influence of it is minimized. Atmosphere often reduces aperture to equivalent of 2-3" anyway in poor seeing and in such cases effect it has on smaller aperture is not as detrimental as on larger aperture. It is often said that smaller aperture "cuts thru seeing" better.
    3 points
  32. Well, you contributed more than I could have done John. I thought MTF was a type of hardboard .
    3 points
  33. It's a lot of money, so best to get concerns addressed! But i'm now concerned I've got 3 hot pixels and you only have 2
    3 points
  34. I've been on this forums for 7 months and I'm sure @JeremyS has been threatening to buy a Baader diagonal for that time.
    3 points
  35. Ok, so this applies to standard optics and the everyday world. But what about Takahashi?
    3 points
  36. There should be a “blown off at the knees” emoji!
    3 points
  37. I found this 3D version of a Buzz Aldrin footprint from the Apollo 11 mission on Thingiverse, I need to tidy up the painting a bit:
    3 points
  38. Reminded me a little of this: "I think you had it there a while back Ted"
    3 points
  39. My latest Samyang 135mm f/2 process, M31 from last Nov/Dec 2020. Integration of 88x180s subs captured over two nights with an ASI071MC Pro and IDAS D2 LPF in the suburbs. Mounted on a guided AZ-GTi, all controlled by AAP. Processed using MaxImDL (calibration, alignment & stacking), PixInsight (bulk of image processing), with final tweaks in Photoshop CS3.
    3 points
  40. A cheapo (£4) skyglow filter. It will be interesting to compare with a CLS and an UHC that I already have. Haven't had a chance to use any of them yet! David
    3 points
  41. Jellyfish Nebula in HOO - 4h 45 min integration over 2 nights - Bortle 6 NW England - Feedback welcomed Equipment - Skywatcher HEQ5-pro (Rowan Belt Mod) - Canon 800d (modded) - TS Optics Photoline 80mm Triplet - TS Optics 0.79x focal reducer/field flattener - ZWO ASI-120MM-mini guide camera - Skywatcher Evoguide 50ED guidescope - 2 inch mounted Optolong L-eNhance Acquisition - Sharpcap polar alignment, ASCOM guiding/dithering with PHD2 - APT image acquisition - Lights - 36 x 300s, ISO1600 and 15 x
    3 points
  42. But you will have dress appropriately before commencing trimming.
    3 points
  43. 3 points
  44. 2 points
  45. Mine also looks identical to those posted above, no sign of the pattern in my final images.
    2 points
  46. Thank you vlaiv. Just two things, one suggestion, one general observation from my reading around this topic. Suggestion: You start off by assuming everyone knows what MTF actually is ... perhaps elaborate exactly what MTF is, even mathematically perhaps, I think the formula for it isn't too complicated for your readers. General observation: whenever I come across MTF plots in the literature, almost without exception the frequency x-axis is scaled from 0 to 1, i.e. the proportion of maximum possible frequency for the scope in question. This is for comparing different configurations of
    2 points
  47. Thanks Shimrod that link took me to the topic that recommended this serial port driver http://www.prolific.com.tw/US/ShowProduct.aspx?p_id=225&pcid=41 I downloaded that and strangely CFM now identifies my equipment (Starsense, Controller and AVX) when it didn't before! So the firmware is now up to date and I am going to wait for a clear night to run through the alignment again.
    2 points
  48. Dont remember seeing this image when you first took it Dave, you have some real fine detail on the horse. Lee
    2 points
  49. Hello. Small bit of kit. Adaptor bolt to allow me to use my SW C/W bar and weights on my ROWAN altaz mount. M16 to M12 - saved a few pennies. It’s the small things I guess plus the wisdom of @johninderby Currently giving the weights a refurb so they do not look out of place on the AZ100 John
    2 points
  50. A 'large' flight case from Allendales... The scope fits with plenty of space to spare... Possessing zero craft skills, I'm not looking forward to cutting the foam to shape.
    2 points
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