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  1. Past hour
  2. My thoughts a ) Seeing was not good here tonight -C11 no powermate b) What gain was you using - I tend to use 70% ish on the planets and a low gain on sun and moon c) it got a bit chilly for shorts and t shirt
  3. How is Grant comming along with this scope? It looks like it is made by GSO, so I assume it has the same crayford focuser as the other GSO 6" RC's out there?
  4. Tried the newly acquired ZWO ADC tonight, using 2 X Powermate 10"SCT, the actual setting up of the ADC went OK, had to use 32mm plossl to get Jupiter in the frame then swop to camera which is where it all went Pete Tong. Moon out and skies quite cloudy. By this time Jupiter had gone too far west so switched to Saturn, tried imaging using Firecapture and PGBfly which goes along at 30fps plus when imaging the Sun using full frame it but couldn't even manage 10fps with ROI but a decent enough image on screen, then tried ZWOASI178 which just about managed 30fps using ROI big enough for Saturn but was only able to get a really dim image on screen. Any thoughts, should I invest in a more suitable camera for planets or am I missing something obvious ? Dave
  5. You have already found the best and easiest solution, tap holes in the top pier plate If you want to add sand or something in your pier remember to make a hole in the middle of the top plate.
  6. Thanks so much for input thus far!! Budget pretty stretched.... but I might be able to manage the AZEQ5 if I am convinced I need it. Might have to sell another kidney.. errr LENS. haha It is true, I may very well on occasion want to try for a hi rez mosaic and I totally get the issue of field rotation when taking so many panels..... but you mentioned the size of the sensor and I had thought about that at least a bit in my choice - the sensor I have ordered is a 1 inch so I would hope I could still do big ones with either of my first two choices? I doubt I will ever have bigger than an 8 inch SCT. Possibly a 9.25....... but I doubt it. It is quite likely I will be happy with a 6 - though I will borrow bigger and play a bit. As I understand it I could do a moon in four panels with the 6inch F/10 SCT at prime and my 20mp 1inch sensor. Thanks so much again! Mike
  7. Today
  8. Yes it’s a ZWO ASI290 MM mono camera. Only arrived a few days ago so not used it yet. Replaced a ZWO ASI 120 MM camera . Actualy bought an Altaor GPCAM3 290 M the week before that but not impressed or maybe it was a defective one but returned to seller. Never had any problems with the ZWO 120 so decided to get the ZWO 290 even though it was more expensive than the Altair.
  9. As one of my favorite parts of the sky, I decided to to a mosaic of the Veil nebula. I may add two more panels to include NGC 6995, however, I decided to process what I have at the moment. FSQ 106 ASI1600mm Panel #1 and #2: ZWO Ha: 330s x 52 ZWO OIII: 330 x 70 This is a two panel mosaic (actually my second deep sky mosaic), stitched and processed in Microsoft ICE and Pixinsight. Visible in this image is the Witch's Broom Nebula, Pickering's Triangle, NGC 6979, and NGC 6974. I would like more annotations on the dimmer nebulae, but perhaps they do not have catalog numbers. Below is an annotated version: And a gray-scale image: I was quite surprised by the amount of OIII signal in NGC 6960, but I've never imaged it with narrow band before Thanks for looking and as always comments/ questions appreciated.
  10. Same, ive looked at it a lot recently since it so easy to find...but its grey all the way...lovely defined ring though, even under Bortle 5 skies with my neighbour's security light bathing my garden in photons.
  11. Yesterday
  12. Yeah, seen it, downunder it started no too long before moonset, but still we got a good view.
  13. Johnindeby, I see the camera, a ZWO?, it is that type and make i am leaning towards, how do you find yours?, pro&cons with said model; my menu of things needed is all most complete, its then to sorting out the ground. My very best regards and thanks to all, Tom.
  14. Yes, I've seen a doco demonstrating this.. the start of a collapsing accretion disc...
  15. Mate, it's a Televue.. you'll love it..... well done on a great choice.
  16. Excellent report of a excellent night.... those views are what we all crave....
  17. Blimey John, with Saturn almost overhead I'm able to give it 375x with my 4mm EP and it stays pin sharp with incredible details, C Ring, Encke Minima, Enceladus etc. etc. Give it a go with whatever power you can!
  18. You've managed to capture some beautiful detail. Well done
  19. Not done any viewing this week, due to full moon this weekend Couple of nights ago, Saturn was only a postage stamp distance from the moon Jupiter was almost overhead Have a go tomorrow night, as moon will be rising later Monday night, doing presentation for cubs group, and Joey's camp for 150 kids saturday afternoon and evening During the afternoon, do solar viewing, and Saturn, Jupiter and some other DSO around Southern Cross and Scorpio John
  20. Greg Check if has screw thread in base to take a filter From what I am reading you going to use a 6mm eyepiece Not sure what going to achieve with a higher powered eyepiece I use 17mm with mine, and rings of saturn are crystal clear Use it also on Mars, same eyepiece, with yellow filter, and able to see northern polar caps John
  21. I forgot to bring my shroud to where I'm now so it does make a bit of a difference for me, but next time I'll bring it And my clouds are pretty far away I think, enjoy...
  22. John Was looking at ZWO ASI 290MC You saying can use single ZWO for imaging and guide camera Was looking at getting ZWO ASI290MM Mini as a guide camera I am also out couple times per month, with my club, doing presentation in primary schools and scout groups Using the ZSO app, was also looking at projecting what viewing, using the ZWO ASI 290MC onto screen of tablet, for physically impaired students Also when public viewing nights, do have people who turn up, wheel chair bound, use the ZWO ASI 290MC that as well John
  23. Hello everyone. I've been trying to decide on a pair of binoculars for about two weeks now and so far I've only managed to settle on the 15x70 specs. Since astronomy in my country is not a common hobby I'm planning on ordering one from Amazon or either having a friend who is going to visit the US soon, bring me back one. My budget is 150 dollars max which I guess also narrows down my options. That said, I read most there is to read about the Celestron Skymaster, Orion, Meade Astro binoculars, Oberwerk LW and Levenhuk Bruno Plus. I know there are better versions from each brand but sadly, besides being impractical for me those are not in my budget, although obviously if I could I'd go for the Orion Resolux or the Helios Apollo (I've read a little about those too). Anyway, although I couldn't find too much information about the Meade pair according to Amazon reviews they are pretty much better than the Celestron and Orion in terms of optical quality and durability, and I realize they're not waterproof despite what the product description states (nitrogen purged haha). Now between the Levehuk's and Oberwerk's I gather that the Bruno Plus is in fact slighty better quality as well, but keeping in mind of a tight budget the Meade seem more the choice for me. I live in a pretty arid country and I don't think moisture will pose much of a problem, let alone being stupid enough to take them out in the rain... So my question is, does anyone have any experience with the Meade 15x70 Astro bins who could assure me they're worth the money, or should I invest a little more and get the Bruno Plus? Note that I have a tripod just in case, and even if it doesn't work out for some reason, getting a second hand or even a new one isn't a problem. Thanks in advance for any replies!
  24. You don't get that much under sampling as you might think. Actually with 80mm scope, I don't recommend going below say 1.5"/px - 2"/px because there is no point really. There is quite a bit of difference in optimal sampling rates of DSO AP vs planetary AP. With lucky imaging you are used to going after critical resolution - maximum provided by aperture. You discard lesser frames and in the end you have enough SNR to do some sort of frequency restoration process - be that wavelets or deconvolution or whatever. With DSO ap things are quite different - there is different metric that is associated with optimum sampling rate and it is FWHM of stars in your subs. Scope aperture comes into that equation, but there are other contributing factors - seeing, guiding/tracking precision and pixel blur (that one is important to some extent in planetary ap as well). We are used to think about seeing in terms of FWHM, but most of the time, FWHM that we measure, even in short exposure like 2s FWHM where guiding/tracking error is minimized, still depends on aperture as well as seeing conditions. You will get larger FWHM with smaller scope for the same atmospheric seeing. Actual seeing (instrument independent one) is actually better in terms of FWHM than people usually suspect. It is often in range 1-2". Local seeing can be quite different to that if there are local thermals as you undoubtedly know (scope thermals, local heat sources like concrete / asphalt pavements and roads, houses even bodies of water). These have cumulative effect in long exposure. In any case, here are some "tips" for sampling rate when doing DSO imaging: - On most nights with 80ED you will have about 3"-4" FWHM, not because of seeing, but because of all things combined. Different scope will have smaller FWHM than that (for example 8" reflector) - Let's say optimum sampling rate (but things are not so clear cut here as in planetary, because we use Gaussian approximation, and gaussian shape is not band limited so we can't find critical frequency when doing such approximation - but we can find sensible cut off point) is FWHM / 1.6. For example for 3" FWHM you would need to sample at 1.875"/px, while for 4" that would need to be about 2.5"/px. - Due to pixel blur you can in practice go as low as x2-3 that value, meaning you can go up to 4-6"/px and you won't get aliasing artifacts from under sampling. Blocky stars are sort of a myth. You can get single pixel stars if you under sample greatly, but it is up to interpolation algorithm when you "zoom in" (and in reality you should not zoom in past 1:1 - meaning one image pixel per one device pixel) how that star will look. Nearest neighbor interpolation will indeed make it look like square, but other interpolation algorithms will not (they might have other "artifacts"). After all - just look at images done with simple lens of short focal length (like samyang 135 or even 50mm lens) - no blocky stars, although aperture is comparable to 80mm (Samyang 135 is F/2 lens so aperture is 67.5mm - very close to 80mm scope). - DSLR or any other OSC sensor will sample at twice "base" pixel size in reality - due to bayer matrix, every other pixel "counts" as sampling point for particular color, so samples are spaced not single pixel width but double of that. However pixel blur will be that of single pixel width
  25. Your clouds haven't reached here yet - the view of Saturn is glorious, with a very sharp view (x240) considering it's so low down, with lots of ring detail! I too have security light nearby and of course the nearly full Moon is a nuisance, but it hardly matters for Saturn. Chris
  26. I moved my scope and Saturn was great, but some clouds came after a short while, so now the session is definitely over. Of course the neighbors turned off their lights in the meantime.... The Cassini was very sharp tonight with my heritage 130... I lost my collimation cap and first time collimated completely without it and I think I've mastered the no tool collimation. I'll check with my local astronomy guru next time we meet, but I think it was pretty good... Anyway, low planets are better than no planets
  27. Just seems counter intuitive to me being I mostly do lucky imaging / look at critical sampling and complain seeing was poor using C11. With ED80 using same cameras with exceptional seeing you get significant under sampling vs just ok seeing which is ideal pixel size. More excuses for poor result, can never have enough of those.
  28. 'Gorilla' brand double sided tape works superbly - it can also be peeled off with a bit of determination. Less squishy than foam tapes - might be important if you have the finder and scope accurately aligned?
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