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cloudsweeper

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cloudsweeper last won the day on March 26 2019

cloudsweeper had the most liked content!

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About cloudsweeper

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    Brown Dwarf

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    Physics, maths, history (family, military, social), pre-modern architecture.
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    Merseyside, England
  1. I drew some circles with a permanent marker on acetate. Just a question of finding coins or screws of the right size! The circles represent 5, 2, and 1.5deg. I might make another with a wider range. Doug.
  2. 12% more light gathering - not a lot! And the triplet will be heavier and take more cooling. For doubles and DSOs, the CA won't be a problem. (I don't find it a problem anyway with my achros.) Not sure what the focuser on the Evostar is, but the one on the ST is not great. If you think the focuser on the ES is better, that would be a strong consideration. (The focuser on my little ES ED80 Triplet is a lovely DS R&P.) Would it be much better than the Evo for the money? The choice is yours, Paul! Doug.
  3. Know what you mean Gus. Got a couple of hours in until after midnight, but not as successful as I'd hoped. The best bit was seeing the Double Double early on - it was good to swap between 'scopes, seeing Vega and the DD together in the widefield, then the DD occupying most of the FOV in the 8SE, and each pair being nicely split at x102/135. Other than that, just the Summer Beehive Cluster and the Rose Cluster. Getting started hopping round was difficult on account of the relatively light sky of course. Good to get out again though! Doug.
  4. ......for my first session in many weeks (except a bit of Moon). I fancy using the 8" Cat, not on GoTo, but rather with the little ED80 Triplet as a guidescope. Hope I can remember how to use all this stuff! Doug.
  5. Paul @wookie1965 - the FL is 1200mm, f/9.45 - so it's good for mag, FOV, and depth of focus, etc.. Rob @Rob - Not exactly grab 'n' go, but when I do put it to use, Yes, it is a joy! Brian @Solar B - good point about using the 'scope in the top saddle, although my top one is short and only has one securing screw, so I go for the side. The counterweight is a nifty arrangement with thick steel plates screwed underneath, and detachable steel bars in a sort of frame on the top. Doug.
  6. Like @Rob ^^^ I have a Bresser AR127L. It's pretty big, but surprisingly manageable. It is easy to use on the Skytee II mount with the AZ4's tripod. I didn't see any need for an apo for my requirements, especially with the extra weight and of course cost. It's a great all-rounder on account of the aperture and longish focal ratio. And much of the viewing can be done comfortably from an ordinary stool (see pic)! Doug.
  7. Nice report RTM - looks like you're gonna learn a lot, enjoy a lot, and - like many of us here - be tempted to spend a lot! Have fun! Doug.
  8. This fine little ‘scope has a fixed dovetail bar, so only goes easily on a saddle to its left or below. So it’s OK on the Skytee II and Celestron GoTo, but for quick and easy use on the AZ4 (saddle to the right) it ends up with the RDF too low. (I even pranged my knee getting behind it the other evening!) This issue was raised on SGL the other day, and Mike @mikeDnight suggested an L-bracket would solve the problem by enabling the ‘scope to go on the top of it. Not only that, he kindly offered to send me a bracket which was surplus to his requirements. Thanks a lot Mike, I owe you one! Now I can use it as a grab’n’go RFT, all set up in the shed, ready for convenient use, so I’ll be using it more often. Yet another benefit of SGL membership, fabulous! Doug.
  9. 7.50pm, Moon 1 day after 1st quarter, east of south, fast 102 frac ready. Pitatus lies to the south of Mare Nubium. Its rim was not as detailed as that of Copernicus; its small central peak was clear. Below it is a pair of similar craters, Gauricus and Wurzelbauer. After an hour, more fine detail showed up in Pitatus, x120 - a tight chain of craterlets in the SW rim, and across the NE rim, a pair of parallel shadows, from terraces perhaps. Great to see such detail in a light sky. Abutting Pitatus to the west is Hesiodus, with a tiny pit at its centre, x200. My targets were the Hesiodus Rille, and the rilles inside Pitatus's rim to the north and east. Sharpest views were obtained at x120, 150, and at 9.35, the Hesiodus Rille just popped into view - very faint, at about 45deg in the EP. More length was noticed with AV, then, once seen, it was easy to go back to! (Looking around briefly, Rupes Recta (Straight Wall/cliff) was a distinct dark gash in M. Nubium, and further south, Clavius was a fine sight as ever with its arc of craterlets of decreasing size.) Still hoping to spot the rilles inside Pitatus, I raised the mag, but still found the view more stable at x150. Then, at 10.10, with a darkening sky, the rille inside the eastern rim was glimpsed - a satisfying observation! The one to the NW is apparently better defined, but escaped me. Good results nonetheless - patience paid off, 2 hours 40 minutes well spent. Doug.
  10. Yes Mike @mikeDnight - the ED80 is a rather fine peashooter! Quality instrument, wide views, very easy to use, smooth focuser, no CA (although that doesn't really bother me). It also makes a good guidescope along with the 8SE on the Skytee II. The only issue I have with it is the way the dovetail is fixed at a certain position, so when I use it on the AZ4 (as y'day), the RDF is very low. Rotating the focuser and diagonal, even reversing the bar, don't change it of course. I might consider drilling a couple of new holes. So it's best used on the Skytee or the Celestron GoTo. As for the Moon, I totally agree with you - fantastic object, giving much enjoyment, in great abundance! Doug.
  11. After using the very large AR 127L yesterday evening, I went for a complete change with the ED80 - a peashooter by comparison. Set up at 6.00pm, with the Moon high, east of south, one day before 1st quarter. After much to-ing and fro-ing, I settled on the southern highlands around Stofler with its distinctive dark southern craterlet. Faraday overlaps it, and that in turn has two overlapping smaller craters to its south. Walther lay above these, right on the terminator, with a dark floor and central white spot. Its western edge was just about defined, projecting into the void beyond. Finished after about three hours on and off. Very enjoyable - a different target area, and putting another 'scope to use giving a different viewing experience. Doug.
  12. Turned into a great session - comfortably perched on a stool, with light clothing in the warm, still conditions. 8.25 - Moon (2 days before first quarter) still pale. 8.40 - lots of thin cloud, but Theophilus, Cyrillus, Catharina, and the smaller Maedler were good and clear. 8.55 - changed the 20mm TV Plossl for the 100deg Myriad - doubled the FOV, but got the Ring of Fire! 9.00 - detail a bit clearer. 9.10 - went up from x60 to x120, thin cloud had passed, much more detail, very nice. Cyrillus showed two central peaks and its pear-shaped craterlet. 9.15 - tried x240 - the third, smaller peak in Cyrillus became evident, but the view was a bit unstable, so I dropped to x200 with the TV Radian. Very nice view indeed. Saw much detail in the central peaks of Theophilus, and the dark craterlet at its NW rim was framed by the pale rim detail and resembled an eye. 9.25 - more unstable now at x200 - tried x300 for the sake of it - awful! 9.40 - moved north to Rima Ariadaeus, west of M.Tranquillitatis - a straight, fine, dark crack, right on the terminator - easy to miss. It ended near the craterlet with the same name, and its adjoining, smaller partner. 9.50 - sky still light, Moon bright, but approaching those dratted trees. Lovely detail at x179 - sharp and clear. 10.00 - Moon at about 35deg, south of west - session coming a close due to the trees. Still no stars out. Took a look at the heavily cratered southern highlands. Sacrobosco stood out (SW of Catharina) with a triangle of three craterlets, one larger than the other two, so resembling a startled face! Most enjoyable - very relaxing and comfortable, much detail, but no glare, and some hitherto unseen lunar features. Thanks for reading. Doug.
  13. She's there now, but a bit pale. I've had to set up near the house since the Moon will be behind trees quite soon. Anyway, I'm ready a little action with the large 127 frac, and a stool to sit on for comfort. Doug.
  14. Lots of good ideas here. I use a tyre off an old toy car! Doug.
  15. Thanks - took a number of years to get to this point! For aperture, the Dob has the edge, and a wider field than the 8SE. But quite often I just like the ease of using the 8SE on its GoTo mount! Since you have the Dob, you might therefore be better off going for a nice, widefield frac like the AR 102S. There are others of course - the Skywatcher ST120 is popular, but the focuser is nowhere near as good as the Bresser's. Mount? - I have a Skytee for the big stuff (or for combinations), but the AZ4 is solid and very easy to use. Have fun looking round and making some decisions! Doug.
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