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arkosg

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About arkosg

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  1. Hm, that seems odd. I often use my Trius in 2x2 binning mode for more sensitivity for those really faint nebulae, but most of this recent set of images are at 1x1 binning. And I still only needed a few ~45s images, stacked, to get the pics I shared. I know the Trius mono cameras are considered pretty sensitive, but I wouldn't think they'd be *that* much different from other, recent cameras out there.... Is the light pollution in your region particularly bad? Cheers, - Greg
  2. Thanks Louise. Our skies are OK but not great - Vancouver is not that far away, and dominates the eastern part of the sky. That said, the skies are not terrible either. But they are definitely not super dark like some locations I've visited! The nebula images I posted are, as I said, using a nebula filter - in this case an IDAS NB-1. In the past I've used a Halpha filter. Without these filters, there is simply too much skyglow and I have a difficult time getting the nebulosity to show up. But with the filters... it's actually quite amazing! The really faint ones are still tough, but that you can see anything at all in most cases is pretty incredible. So if you're keen on nebulae, I'd strongly suggest some sort of narrowband filter (I find that the more general skyglow/light pollution filters don't sufficiently darken the background to bring out the nebulosity as easily). Cheers, - Greg A
  3. Thanks guys. The exposures actually *are* included - but in tiny print on each image (Starlight Live includes this info automatically when you export an image). Exposure times vary depending on the object, but for this set of images I typically used 30 - 45 sec exposures on fainter objects, stacking 3 - 6 images (sometimes SLL would stop stacking early for some reason). The Trius is also being run at 1x1 binning - in the past, I've commonly used 2x2 - just to see what impact that has. Definitely means slightly longer exposures need, but (atmosphere willing) more detail. The 1x1 binning is also why the exposure info is in such small writing; at 2x2 it is a more readable size. Cheers, - Greg A
  4. Hello everyone! After a pretty dreary September and part of October, I was finally able to get out with students to do some viewing. Here are some of the objects viewed over two nights using Starlight Live software on my Borg 77edii (f/4) and Borg 125SD (f/5) with a Trius 694 mono camera. In most cases an IDAS NB-1 "nebula" filter was employed to help with the suburban light pollution in our skies. The first night (mainly 125SD) was much steadier and drier, but along the coast we take what we can get when it isn't raining! ;-D It's so much fun to see these objects from less-than-optimal skies... I often intend to quit much earlier, only to find myself saying (over and over!) "... oh, look, <object> is coming up... I should just have a look at that before I pack up." And then another hour goes by! Cheers, - Greg A Eastern & Western Veil Comparison of FOV between two scopes on the NA Nebula Again, FOV comparison on the Elephant Trunk Nebula And again, with the Rosette Nebula Pacman Nebula through the 125SD: And Crab Nebula: And the Cocoon Nebula: Finally, a few wider shots of objects using the Borg77: Flame/Horsehead, California Nebula, Pelican Nebula and Andromeda Galaxy:
  5. Hi Martin, Thanks! Conditions were really pretty good (for here), and it definitely makes a difference as to what you can achieve when the seeing is better. I'm using SLL v 3.4. The SX mini FW is normally pretty well behaved, although I have had occasions in the past where it "freezes up". Sometimes, in the past, I was able to physically unplug it and replug it and have it be recognized successfully again. But this last couple of sessions it's required a restart of SLL to get the FW working again. One session I had numerous "freezes" in a fairly short time span. It's the same cabling, etc. I've used for the last year, so that hasn't changed, or how I connect the FW and the Trius 694. I tried it out "inside" and things seemed to behave pretty well, though I was eventually able to get a freeze after repeated FW control commands one after the other. It seems random to me - or at least, I haven't figured out a pattern to it at this point. Unrelated note: I've also noticed a bit of amp glow (?) in the top left corner. Again, seems to vary. Could be issues with darks - with all of the FW freezes, it's possible I started imaging again without taking/applying darks, which could be the difference in this case! The "banding" issue seems to appear only during 1x1 binned images. If you look at the M100 image (wide field), particularly in the darker corners, you may be able to discern a "tartan" pattern of horizontal and vertical banding. It seems to vary (and I haven't tried to pin down what makes it stand out). Below are other Halpha 1x1 examples taken from a different observing session; I've stretched the contrast a bit more so you can see the issue clearly. Again, it seems to only occur in 1x1 mode (or at least it's more evident then). Are the flats you mention for use with Jocular? Clear skies! - Greg
  6. Hi everyone, It's been a challenging spring here on the West Coast, and opportunities to get in some observing have been fewer and much further apart than I'd have liked, so I was happy when a nearly New Moon coincided with some clearing and diminished winds. I dusted off my 5" Borg refractor @f5 riding on an Ioptron AZ Mount Pro (alt-az) with a Starlight Xpress Trius 694 mono camera (running 1x1 and sometimes 2x2 binned mode) and filter wheel (typically shooting through a luminosity filter, though I did some Halpha viewing as well). Using StarlightLive v 3.4 on the Mac (I've noticed some "banding" in 1x1 shots, and had a few SX filter wheel control "freezes" that required a restart of SLL). Usually a stack of a half dozen or so 30s or shorter exposures (depends on how my mount is feeling and where in the sky I'm observing). No guiding. My standard observing location is a suburban sky in a small city at sea level with Vancouver BC nearby to the east and trees blocking much of the W-NW sky near the horizon. Hope you enjoy the shots! Clear skies, - Greg Arkos Antennae galaxies - with faint tidal tails! Not bad for so low in the sky... \ Leo Triplet M100 with supernova! Closeup of earlier (before) shot and above Some Halpha viewing: PacMan Nebula, Wizard Nebula (which I hadn't viewed very well before), Elephant Trunk Nebula, and finally the Eagle (M16) just rising as I was packing up.
  7. Hi Rob, I was wondering if it was my imagination or just *wanting* to see the comet's tail, but I agree - there may be a hint of something at about 11 o'clock. Don put me onto the SLL beta. I'm hoping it means that there will be continued development... if nothing else, at least they seem to be trying to address some bugs and hardware related issues, which is very much appreciated! Cheers, - Greg
  8. Hi all, A brief break in the winter monsoon here on the west coast, and I managed to get a look at Comet 46/P Wirtanen. Equipment: Borg 77EDii at f/4, with the Trius 694 (1x1 binning) and filter wheel combo. Below are a luminosity filter shot and an RGB composite taken a few nights ago. It's big! But I couldn't really see much sign of a tail of any sort... Cheers, - Greg PS. Trius 694 is now working at 1s exposures, and at 1x1 binning on the Mac with the new beta of SLL from Starlight Xpress - thank you!!!
  9. Hi Don, Thanks, and yes, on the Mac I still need to use 2x2 binning for things to work. I don't have ready access to a PC to see whether SLL for Windows functions properly, though it has been suggested that this limitation may be a (Mac version only) bug. One of these days I will give it a try and see if I can verify this! Cheers! - Greg
  10. Hey everyone, The school term has started, and after almost a month of rain we were able to get the Borg 125SD at f5 out again, with the Trius 694 and filter wheel combo. Here are some of the objects - a few are more wintertime than fall objects, just a consequence of a late start. Clear skies, but only average seeing. One pleasant surprise to me was how well things worked even with a nearly full moon... visual work was difficult, but the camera & filters worked pretty well! The images are all captioned... see if you can find the planetary nebula in M46! ? Enjoy, - Greg A
  11. Hi Rob, I'm running the Trius 694 in 2x2 binning mode. There seems to be a bug in SLL for the Mac that won't allow me to run it 1x1 (crashes) or any other binning mode (distorted images). Luckily, 2x2 seems to be useful in terms of balancing resolution with sensitivity; it isn't quite as sensitive as the Lodestar X2, but close enough, and with larger FOV and higher resolution, even at 2x2. I haven't had a chance to use the Ultrastar, so can't say how that compares.... Cheers, Greg A
  12. Thanks Rob and Martin for the kind comments, and to everyone else for your likes! It's gotten smoky here on the West Coast, as smoke from fires burning in California up through the pacific NW and into BC have all combined to make our skies hazy and indistinct this past few days (I hear it's been smokier for much longer for some areas, so I won't complain too much....) . Anyway, thought I'd share some shots from the last round of EAA a little bit ago, with the 5" Borg refractor at f/5 and the Trius 694 and filter wheel combo, short exposures and usually only a few subs. Some Halpha shots too. The skies during this session were definitely slightly hazy (this was before the main forest fire smoke moved in), but even so got some decent results. I don't have Don's lovely dark skies, but I was thrilled to finally be able to get a reasonable view of the Helix (it's VERY low here, even at the best of times, and with the hazy skies I was doubly uncertain it would turn out....). Cheers. - Greg A
  13. So a follow up. Got out a second time in a week (!), this time with a smaller 3" Borg refractor, same mount/camera/filters. Some slightly longer exposures, but still all under 1 minute, and typically less than a half a dozen images to a stack. The skies at this location were perhaps a little darker, but more humid conditions. A lot of the shots were Halpha images this time 'round. Enjoy! Greg
  14. Hello everyone, After a bit of a hiatus, I was able to get out again and enjoy new moon/clear skies from a slightly less light-polluted viewing location. ? For those who have seen my past posts, I'm still using StarLight Live 3.3 with a SX Trius 694 camera, now with SX filter wheel. I alternate between using an 8" SCT and various Borg refractors - these shots are with a 5" Borg, with exposures < 30 s. The combination works well, overall, and SLL controls the filter wheel which makes jumping between L,R,G,B and Halpha filters really easy and fun! The only major issues I have are that (on my Mac) SLL seems unable to run the Trius in anything other than 2x2 binning. I haven't been able to get a PC to test whether this is only a Mac related issue, though others have apparently been able to use this camera in all the various binning modes via SLL windows. I also have focus/framing problems if exposure time is set to 1s (camera drops out and SLL freezes up). To facilitate not having to refocus, everything was shot through either an L filter, R+G+B filters, or Halpha filter (all Astronomik 1.25", in a single filter wheel). It generally worked really well, but occasionally I would switch colour filters to do a composite and SLL would stop stacking and I've had to start my colour composite from the start again. But a fantastic feature of SLL! Enjoy the shots - these (and others not posted) were all taken over a few hours time in the early morning. I love how much - and how quickly! - you can view with EAA! Cheers, Greg A
  15. Hi Don, I'm still "stuck" in 2x2 binning mode, unfortunately (?). I am a Mac guy, and have not used it with Windows. Someone who had the Atik version of the 694 (Atik 460ex OSC) posted some results using Atik's Infinity Software: https://www.cloudynights.com/topic/607284-using-atik-infinity-software-with-an-atik-460ex-colour-camera/ Cheers, Greg A
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