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Showing content with the highest reputation on 27/11/18 in all areas

  1. 5 points
    I would get the scope recommendation above, and as for imaging, imaging DSO's is no small potatoes, to get it right takes a good equatorial mount, patience, knowledge and experience with scopes, and a whole lot of trial and error. The scope recommendation made by vlaiv is the quintessential beginners scope and, will provide you with years of planetary and deep sky observing, imaging sounds real cool but i feel you'll to be pulling out your hair lol. Here's my analogy about imaging as a beginning amateur astronomer, you're going on vacation for the first time in your life, you buy the best camera and lenses and all the bits to record it, but you spent your vacation figuring them all out and missed the sights.
  2. 4 points
    This was a bit of an experiment - but by the time I'd finished with some lunar stuff I was getting pretty frozen, so I didn't really complete it. The idea was to get Uranus with moons using longish exposure, then do Uranus again with Powermate and shorter exposure, then do a composite having rescaled the background. I did the first shot at native 1000mm, but then packed up. I need to find a warmer hobby - or a warmer climate maybe. Normally I do AVIs, but for this I did a series of 100 TIFFs, not sure why - seemed a good idea at the time. Gain 422 -bit random. Stacked in DSS, didn't process. SW Quattro 10 + ASI290MM. (red filter) Not really very exciting but amazing to think that Ariel is only about 725 miles in diameter and is 1.76 trillion miles away!! Hmmm - Is that really right?
  3. 3 points
    My first attempt at NGC1333, which is a reflection nebula in the constellation Perseus. There's quite a lot going on in the LRGB image below which represents just over 14 hours integration time and was taken with my Esprit 150: a blue reflection nebula, dark dusty lanes and intense areas of star formation. These latter regions contain an impressive collection of Herbig Haro objects which are formed when narrow bands of very rapidly moving partially ionized gas, ejected by the proto stars, collide with by nearby gas and dust. I decided to run my customized Pixinsight annotation script over the image which revealed that it contains over 20 HH objects, given that about 500 have been discovered, this seemed quite a catch ! Alan LIGHTS: L: 38, R:15, G:15, B: 19 x 600s, FLATS:40, BIAS:100, DARKS:30 all at -20C.
  4. 3 points
    I would like to present astro controller of my own design dedicated for astrophotography. I've worked on it for over 15 months, but I'm finally very happy. It works properly and has an integrated USB 3.0 HUB. Details on my blog. English language available after clicking English flag in the left corner of the page. Basic functionality: Integrated wint PCB USB 3.0 HUB based on the Microchip USB5537B chip Built-in FT232RL serial port for communication with the microcontroller ATMEGA 328 Two 12V sockets and one with regulated voltage of 12 - 35V Heater power control based on measurements of DHT22 temperature and humidity Focuser service via RS232 socket based on TB6612FNG chip Elements on the PCB of my own design Detail description and diagrams on my blog: https://moje-nocne-niebo.blogspot.com/p/astro-controller-usb-30.html
  5. 2 points
    hi, today i started moving ground for my home observatory. The idea is to combine a carport, garden shed, obsy and bicycle storage, the structure will be 15 meter long and 4 meter wide. Here's a plan and time-lapse of today's progress. (hope this works .mov file) Home Observatory.mov
  6. 2 points
    Imaging telescope or lens:TS130 f6 Imaging camera:G3-16200 Mount:10Micron 120x600 HA Remote hosting at e-EyE in Extremadura, spain SkyEyE Observatory
  7. 2 points
    Apologies you are quite right when referring to the newer types John. I'm talking from experience with the older type of MDF which so many 'diy' programmes used 15 years ago. It was banned from production in the US. Glad that Dave is wearing ppe and encourage others to always put their health first when using it.
  8. 2 points
    Thanks ! I'm going for a flat roof, over the "OBSY" section there will be a sliding roof section of 2,5 by 2,5 meters. The Obsy-section is in essence the cold part, it will be closed with a wall, my desk will be against this wall en there wil be a large window in it so i can see the "action". The cold-room will be 3,6 by 2,5 meters. On the left side there will be a door, leading to the ramp to get to the raised floor of the observation dek. There will be a concrete pier base about 40by40 cm and a height-adjustable pier on top of the concrete pier. The obsy will be mostly for imaging.
  9. 2 points
    Mine shows pretty much the same as yours. I have V9.6 firmware though. The thing that stands out to me is the input voltage. If this is idle at 11.8, I wonder if it is dipping too low during a slew/tracking and causing problems. I run my mount at 13.1 volts at which it is very happy. As noted by Steve, the Yahoo group is really helpful.
  10. 2 points
    Early this morning, just predawn, I was out with the dogs. Skies were clear and crisp to the south west and Venus was very very bright. As I looked I thought I saw some shape to the brightness with a clear diagonal emphasis. I assumed that this was some kind of diffraction trick of the light but the more I gazed there seemed to be a definite pair of "horns". I really didn't know what phase Venus should be showing so I checked with Stellarium and it was just as I saw. Googling as to whether such views are possible the word seems to be that in theory it is possible but unlikely. I'm pretty certain of what I saw but eyes and brain play tricks so I'm happy for it to be a "maybe". One possible plus point is that I was wearing my new specs'! Has anyone else had this experience?
  11. 2 points
    For visual, go for the biggest aperture you can (but make sure you actually see the scope first ... big can sometimes mean unmanageably big!). This also applies to planetary AP (thousands of exposures, a fraction of a second long, on a video which are then processed into one image - that's the short version!) For DSO imaging, the mount is FAR more important than the scope. It is possible to do it with an AZ mount (I have seen an image of the horsehead nebula made up of 2000* 2s exposures, but it is not the way I would choose to do it), but you are tying one hand behind your back. If AP is a direction you want to go, get a copy of this book before you purchase anything else. It will save you time, money and heartache in the long run.
  12. 2 points
    Mars looks like my soup... Soup: Mars: Are they by any chance related?
  13. 1 point
    My advice would be 100% to shoot 1200s subs over 600s ones. The signal is so faint that the only chance you'll have of bringing it out will be with longer subs. If there isn't enough signal in a single sub to separate it from the noise, then it won't really matter how many subs you have. Also, not only is the signal weak, there's also virtually no structure to it. So worst case scenario, you could always just remove the stars, stretch it and use it for tonemapping.
  14. 1 point
    This question does not relate to a problem I am having, I am just interested to know more about it. 1. Is there a way to work out how much NPE there is in a mount? 2. How does a mount differentiate this from cone error during a three star alignment? Or does the mount only work out the cone error during a 3 star alignment and just uses the value of NPE left in the handset? James
  15. 1 point
    I 'm starting this thread for everyone to post new SPAP related software or apps. Recently I downloaded an android app called DeepSkyCamera. It's still beta version, but looks quite good. It is actually an intervalometer for the phone's camera. You can set exposure, number of sets, and choose to save them in a folder as lights, darks, or flats, for later stacking with dss or equator on p.c. Now... all we need is an in phone stacking app
  16. 1 point
    Yes, 08:22 will mean you need to put Polaris on the large circle of the polar scope reticule at that position, assuming 12 is at the top, 3 to the right, 6 down and 9 due left. The issue is the reticule in the polar scope won't be aligned correctly to use the markings on it, so you either have to align the reticule first (an utter ball-ache so don't bother), or just be creative about thinking where 08:22 is on the polar scope reticule. I'll try and draw some examples and post them. If you have Polaris roughly between where 8 and 9 should be, that will be sufficient polar alignment for visual and/or basic astrophotography. If you need your polar alignment tighter than this, then you need to be employing another method anyway in my opinion. James
  17. 1 point
    Such a pity SharpCap does not do flats along side darks. With a bit of tweak EAA images can certainly be keepers - sort of digital observation diary.
  18. 1 point
    Ah ok, thanks. I thought JTW used Sitech II, but looks like they are using something else on this. Hmmmmmm similar cost to Muse200 then? Can't see what the benefit would be.
  19. 1 point
    just a qwick shot through a gap in the clouds. kit oldfaithful, 1200d. sorry about the Ca I didn't have much to work with. hope you all have clear. charl.
  20. 1 point
    Neither do I. I simply wonder given current set of physical laws how does consciousness arise as result? It is there, we are conscious of it so there must be mechanism for it. If our physics can't explain it (or derived theories in other fields) - something is incomplete. In my view there are bunch of open questions about it - enough to make me wonder if our understanding is incomplete (either because we did not bother to explain within current framework, or it is the framework that is lacking). Same thing goes for free will. I can agree that free will is just illusion. I wonder why is it such persistent one, and ultimately what leads to its creation (why do we "feel" like we are making a choice, and ultimately was it necessary evolutionary to be like that and why, or was it just fluke and why).
  21. 1 point
    I agree wholeheartedly with your first point Andrew. In fact the other day I watched an amusing video from the series Sixty Symbols where the presenter (Professor Phil Moriarty , University of Nottingham) was railing against some piece of "new age physics" carried by a tabloid attempted to link quantum effects to the macro world. Similar idea as discussed here that through the entanglement principle our conscious mind is linked to the physical world. It's the old adage , a little bit of knowledge and perhaps eagerness to write and sell another book. I'm sorry I just don't see it, too much mysticism for me. As for your second point I'm not ready to surrender free will. I agree it's is informed by biology and environment - so in that sense not entirely free I guess. But I have to believe we have choices and that we and we alone must own those choices and their consequences. I do like your last take on it though - "we should act as we do " . I haven't seen that sentiment expressed elsewhere - I do like it. Jim
  22. 1 point
    If this helps. I have just the Mesu 200 on and sync'd it with Cartes du Ciel Parked position. Here's the settings.
  23. 1 point
    I have a friend who worked in the 60's control room. Pocket protector, slide rule the whole shebang. Took an early computer course at Fla State for fun and got a job for a subcontractor there at the Cape. Said they're computer then had 7 foot of magnetic discs and a whopping 15k memory.
  24. 1 point
    If you want the scope for visual as well as astrophotography, then I would go for a extra aperture you will get from a 130PS or 150PS.
  25. 1 point
  26. 1 point
    This might help too. Especially the bit about cutting little circles to match your optical finder.
  27. 1 point
  28. 1 point
    The whole image was made up from 5 shots on my Canon 650D on my 9.25 sct.
  29. 1 point
    I have an unmodded 1100 I'd be happy to swap.
  30. 1 point
    Hello and welcome to possibly the best forum on the internet! Oh and if you come up with the answer to the telescope question, please share. I have just found my first 50mm refractor, ( in the loft, ) which I got bought me about forty years ago and I am contemplating buying another new one! ?
  31. 1 point
    Seems ages since my last bit of Sol 60mm d/s lunt chameleon cam
  32. 1 point
    What a beauty, it will return again before we know it!
  33. 1 point
    One thought has crossed my mind following on from another thread: Given that OIII and Ha are in quite different parts of the spectrum, can the filter be 'parfocal' for each wavelength, given that the 'optical' thickness will be different for each? Also, presumably if the 'scope isn't truly apochromatic, each of these wavelengths will focus at a different place. So all this leads me to wonder if the image can be truly in focus simultaneously for OIII and Ha? Any users care to comment? Otherwise, it has the potential to be a great time saver. Ian
  34. 1 point
    Well I have just had a good look into the sensor chamber with a strong light and a magnifying glass. There were dust motes on the outer surface of the glass and after blowing these away I could see a tiny speck on the sensor and another on the inside of the glass. Nothing for it but to open the chamber. Inside there are four desiccant tablets and it could be that the small specks came from those. After some careful use of the air pump (the tablets are very light) and reassembly it looks like I have eliminated most of the marks; certainly the prominent ones at least although there is a small one remaining in the middle of the image. Now I must wait for some dry weather to have another go at imaging and producing a new set of calibration files but I am much more optimistic, especially after Gavins efforts which confirmed I wasn’t doing everything wrong. Cheers, Anthony
  35. 1 point
    Thanks Mike, You've got it spot on, everything you said there is true (except I haven't had chance to see any galaxies with it yet). It was the blue star in Albireo that made me think this in the first place, as the yellow one looked fine.
  36. 1 point
    @Ken Mitchell You have captured a beautiful image, and a great bonus capture of PGC 13696. 315 million LY's away.
  37. 1 point
    It's obvious that I have no idea what I'm doing since this is my first "complete" NB image, but here it goes (click on image for full size version): This is sort of preliminary version, I need more practice and probably need to restack my data before another processing attempt (a lot of issues like dew on secondary, OIII not being that immune to LP so gradients are still there, ....) Tech specs: RC 8" F/8, ASI1600, Baader NB filters, Heq5 (OAG+ASI185), 64 x 240s per filter, total 12h 48m Captured with SGPro, data reduction ImageJ, processing Gimp Commends & Critique welcome as always, thanks for looking.
  38. 1 point
  39. 1 point
    Lessons from the Masters is quite good
  40. 1 point
    I just use CS3 and love it. I very much enjoy deep sky image processing in Ps because it suits the way my brain works. (This may not be a good reflection on Photoshop though! ) I'm not aware of any significant upgrades so far as DS imaging goes. Olly
  41. 1 point
    Hi. I don’t have the detailed spec as it was designed and made by Alan Marriot of AGM Design in Stevenage. I can share his details. Some pics attached. It’s over engineered and Alan charged me £200 for design and manufacturing. It weighs 2.25kg. It was originally for my 100mm APMs but takes the 120s easily. Although it’s more costly than commercially available ones it’s supporting well over £4K worth of kit not including eyepieces. So I think it’s worth making sure you have a good bracket. The dovetail is not shown here as it’s attached to the bottom of the bins but it slides into a channel which is secured by a moveable clamp operated by two screws on the side which move the clamp up against the dovetail. You can move the dovetail along the channel to get the balance right but I hardly need to adjust it at all. Note that he designed it specifically for the AYO Mount and it’s style of clamp to attach the l bracket. The Ioptron may need a different style. I agree with an earlier comment that counterweights are best added to keep it smooth Hope that helps. Best. Malcolm
  42. 1 point
    Takahashi FQR-1 finder quick release and Tak MEF-3 micro focuser. Both for the FC76 DCU.
  43. 1 point
    Try this: http://www.aicccd.com/archive/aic2008/CCD_stack_calculate_gain_by_stan_moore.pdf Or this: http://casa.colorado.edu/~bally/Current_Course/ASTR_3510/Useful_documents/CCD_Gain.pdf However, there's one complication. If you are using a one-shot-colour camera or DSLR then it is essential to separate the colour channels and do the calculations on each colour channel independently. Mark
  44. 1 point
    I’m actually impressed at how advanced the software was; I’m also impressed at how quickly it computed the positions of the planets for a given date - not a lot slower than my laptop now ... James
  45. 1 point
    Not sure how I missed this post! Fantastic images!
  46. 1 point
    This is how I hold all my sketching kit. Laminated A5 ring binder, pocket pencil holders, red clip light and some bulldog clips.
  47. 1 point
    I wouldn't bother. I mean, honestly, have you ever seen such an ugly bunch?
  48. 1 point
    I have the 10, 7, 5 and 3.5 Pentax XW's and they are, within a mm or so, par-focal. I don't know about the 14mm and 20mm though
  49. 1 point
  50. 0 points
    I celebrated by going yeah and punching my hand in the air, the party ended at that point as my poor old back muscles gave up on me! InSight landing is most memorable for me, even this morning as I cannot move..... Looking forward to the science that will now take place.
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