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Showing results for tags '90mm'.
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I bought this second hand, but it was almost untouched, and a relative bargain to boot. New it costs 1199 EUR from TS (approx. £1035 as of 08/03/2019 but who has any idea how this might fluctuate). Highlights: Apo air-spaced triplet with FPL53 Multiple focus positions thanks to removable tube segments 2.5” rack and pinion focuser, rotatable, dual speed controls, 6kg payload, with printed scale CNC tube rings and dovetail supplied Retractable dew shield First impressions: It’s a really nice box. Whilst it’s described as a ‘transport case’ the supplied storage box is sturdy and well made. Inside, the foam fit is precise bordering on tight. It’s actually mildly difficult to get the scope out of the box. Things get a little easier if you loosen the tube rights slightly, allowing for some tube rotation, and a longer term fix will be some straps to aid lifting the scope out vertically. The scope itself feels very well made, and is what I’m choosing to refer to as ‘reassuringly weighty’. At just over 4kg (without diagonal, eyepiece, or finder) there are definitely lighter options available, but it’s hardly a heavyweight. The finish is powered coat white, which looks and feels very nice. The focuser is very smooth (compared to my SW ED80) and feels pleasingly solid. I’m not going to be testing the stated 6kg payload any time soon, but I can easily believe it will be able to handle it. The dew shield is held in position with a single thumbscrew, and whilst it’s retractable credentials are clearly warranted, it only seems to extend a couple of centimetres. As it happens, this takes the overall length down to 450mm which was the very top end of my acceptable range in order to meet my ‘travel’ requirement. The focuser body also incorporates a finder shoe, but if you wanna finder then you have to supply your own as there’s nothing included. The idea of having additional tube segments is that you don’t have to rack out the focuser so far, and so improves stability. This also allows for multiple reducer/flattener options for imaging use. The TS website details the specific configurations using their recommended equipment which provide a faster f/4.9 option for sensors up to 36mm, or a full frame flat image at the standard f/6.6. I might be exploring these options later, but for now, this is going to be for visual use. First light: OK - this barely counts, but I was impatient. Predictably enough, first evening with a new telescope and it’s raining. But I did manage a pretty decent look at my neighbours TV aerial and chimney stack. They need some re-pointing. … The following evening (9th March 2019) was less rainy, but much the same for cloud, all but for about 30 minutes of relatively clear sky, interrupted regularly by patchy cloud. So still not great. However, my ambitious setup to allow for cooling paid off and I did manage a few minutes of actual use with a SW 28mm eyepiece. The Baader Zoom I also treated myself to for my travel use is frustratingly still not dispatched. And when I say set-up, I mean just carrying everything outside. I’m using this on the SW AZ-Gti mount, and a Manfrotto tripod I had already, so it’s very easy to pick up and take outside. I was using the scope with one of the two removable sections in place (this is how it is stored in the supplied case) and was able to achieve focus with a 2" diagonal without having to rack out excessively. Sirius was an obvious target to the south, and an easy hit. Brilliantly bright, as expected, and a blue-ish white colour. The upper half (the rest was below my sightline from home) of Canis Major was easy to see, with several of the background stars also visible. Despite the less than great seeing, the view was impressive. Stars were tight and there was no obvious chromatic aberration. Moving up to Betelgeuse, it’s orange-red brilliance was very pleasing, and again I was able to make out some of the fainter surrounding stars. Overall the view was very impressive, and bright. My only real comparison is with my SW80, and of course I now have over 25% more light, so that’s to be expected. But still, it makes an obvious difference. I wasn’t able to note any CA or distortion, and a quick full visible spectrum (no filters) star test reflected spot on collimation and no apparent astigmatism. Alas, the break in the patchy clouds did not last long, and I was soon packing up for the night and heading out for a beer. I’m looking forward to getting some more quality time with this kit, and who knows, I might even align the AZ-Gti next time and write a brief review for that too.
Just been out observing Saturn! I saw cloud belts and a Cassini division and the best thing was I was only using a little 90mm refractor, the view was so clear and sharp and full of detail! Never new a scope that size could provide such a good view!
Hi all. Looking at possibly getting a secondhand Opticstar AR90S f5.5 short refractor, primarily to use with binoviewers, but also to use on my Goto mount I have, and possible in the future too for some EAA too perhaps.. Looks like quite a good quality scope so just wondering if any members have/had one and how it performed for you. Cheers, Gus
Hello guys as you see i am new in the forums and im starting my stargazing adventure.I want to use my telescope as an astronomical and a terrestrial telescope so preferably a mak or a refractor.My budget is 450 dollars for both telescope and tripod. I already found one good telescope http://skywatcher.com/product/bk-1206az3/ Its the skywatcher 120/600. Let me know if you have any other telescopes.Thank you
I am looking for an airline-compatible APO. However, small size is not the only factor, I want it to be a great all-rounder, performing well for both visual and photographic deep-sky work and visual planetary. I'd also use the scope for daylight birdwatching/photography. Currently I have an C5 omni XLT, which I feel limited (lack of contrast). I didn't carry around the c5 too much, but provided I pick up a lighter mount (astrotrac...) this bulk and weight should be OK. Currently I have 3 candidates: 2nd hand TMB-92 Signature Series f/5.5 2nd hand TS Photoline 90mm f/6.6 (a bit heavier but cheaper ) Primaluce Airy Black 90T or the equivalent but cheaper Technosky 90 (both should be Shaprstar scopes). Which one would you suggest? As for mobility, the scope + mount head (sky adventurer??) must fit in a smaller hand luggage, the rest is not important, because I usually hire a car at the destination.