My Sky-Watcher 120mm ED-APO refractor arrived yesterday and I was certain I would suffer the new telescope curse of several nights of cloudy skies – and what’s more, didn’t much care!
Oh, I was anxious to see what this bargain priced “apo” could do – and hoping it would live up to it’s hype – but I’m also battling a major cold and spend most hours feeling at best half-drugged on cough medicine – at worse, looking for a firing squad to offer myself to as target practice. The forecast seemed to bear me out, but there were some question marks in it and after supper I curled up on a small couch and tried to get a little nap. This hadn’t worked for most of the day – I’d lie down and in 10 minutes be up again coughing.
But shock one – the nap worked! I didn’t wake up for two hours, felt refreshed, had missed my dose of cough medicine by two hours and didn’t feel a need for it. I had set up the new refractor on the T-mount on the observing deck earlier in the day and left it out just in case. Well, now it was dark and I either had to bring it in, or use it if there were some holes in the clouds. So I got dressed for outside. Checking the temperature, I saw it was 51 degrees which would seem to indicate clouds.
Nope. Shock 2: Wonderfully – totally – clear! Not much wind either, though that too had been in the forecast. Shock three was not so pleasant. I gazed around trying to figure an appropriate “first light” test. I thought a good, challenging double star like Rigel would be perfect, but it was too low. So I settled on Saturn, high in the south.
Arghhhhhhhhhh! Shock three: It looked horrible! Even at low power. What was wrong with this scope! It is supposed to excel onplanets and double stars. I quickly swung it over to nearby Algieba and increased the power. This relatively easy double did split, but again, very sloppy: Like it might in the 15-inch before the mirror had cooled . . . oh my! Maybe I wasn’t quite awake. Maybe that cough medicine still had my brain sizzled. The scope’s black tube – it has these wonderful flecks in it that sparkle in the sun – had been exposed to the sun all day. There’s a built in (not collapsible) lens shade. And, of course, I had left the lens covered until right now. Must make a wonderful little heat trap up there at the end of the tube where it can do the most damge. The lens obviously needed time to cool.
So I breathed through my nose, went back inside to make myself some tea, and came out again. It had now had 15-20 minutes to get down to air temperature. since it’s a doublet I thought that might do the trick. In any event, I swung it over to one of my favorite triples, Castor: Bingo! Charming. The seeing was nothing to write home about, but there were the nice faint diffraction rings I hoped to see, almost kissing each other in the case of the two brighter components. (I think this was with the 13mm – 69x on this 900mm focal length. Though I’m pretty sure I jumped to the 7mm (129x) but I wasn’t taking notes.)
No – I didn’t do a formal star test. Didn’t study the image inside and outside of focus. I’ll leave that kind of hard-nosed review for another night. I wanted this to be a gala opening. I like this scope. I love the idea of having almost five inches of really fine refractor at my command without breaking the family budget. Yeah, the Chinese, I know. Hey – they are doing some real good work at incredible prices. I also like little details here – such as making the both ends of the scope white so you can see themin the dark, but leaving the bulk of it black.
This is a nice scope and it comes at a price that includes a really nice 9X50 correct image finder and what certainly seems like a very good 2-inch diagonal. (The price was $1495 and shipping was free wtih the retailer I used.) The two eyepieces included, a 20mm and a 5mm, I could do without. They seem serviceable. They may even be quite good. But I have a nearly complete set of Televue Naglers and I use a manual, alt-az mount, so I really want the wide field the Naglers provide. The eyepieces that came with the scope can wait for a more thorough evaluation another night as well.
I don’t like to bounce around a lot. I sit at the telescope and I spend time on target, but I did take a quick look at the Beehive (M44), just to experience an open star cluster. And I did stay long enough to see all four members of ADS 6921, a quadruple I’ve found a little deceiving in the past when using a good 102mm refractor. But I wanted to see how the 120ED handled a globular cluster, so I swung over to M3 and remained entranced. The seeing didn’t allow the kind of power I would have liked to use, but it was nice at about 129x.
Somewhere I found a few moments to get the 15-inch Obsession set up and the cooling fan going on it. I didn’t know how long these skies would last, but this is galaxy season and . . . so, how does this reffractor do on the Leo Triplet?
Answer? Just fine, thank you. M65 and M66 show their distinctive traits and their ghostly companion, NGC 3628 popped right out. Of the three, I have to say NGC 3628 tends to hold my attention the longest – I guess because it plays periferal vision games with you, teasing you into wondering just how much you’re seeing.
Those three confirmed I moved on to the other “triple” in Leo – M95, M96 and M105. This is really a quadruple – or a quint – though I admit, it’s very hard to fit them all in the same field of view. I almost always find M105 first and the reason is, it’s a double! Why didn’t Messier list it this way?
Well, maybe because Messier never listed it. It was found by his buddy Pierre Mechain, but not passed on to him for inclusion in his list. It wasn’t added to the “official” Messier catalog until 1947. But that still doesn’t answer my question. M105 has a companion that’s only about half a magnitude fainter and 8 minutes away – that’s as close or closer than a couple craters on the moon such as Plato and Copernicus – NGC 3384.
In the new scope – as in many others, it seemed almost as bright as M105 to me, although it’s listed as half a magnitude dimmer, that’s hardly dim. What’s more, M105 is a triplet in itself with a third, much dimmer companion, NGC 3389. And no, I didn’t see this – forgot to search for it. I was having too much fun. What I should have done is put the Clearvue 30mm eyepiece in – that would have have given me a field of more than 2.5 degrees and I at least should have captured all four galaxies in one gulp – though I’m quite sure the fifth would remain elusive at that power, though the exit pupil still would have remained well within the capabilities of my aging eyes – hmmm… really need to try this! That 30mm Clearvue was another bargain. It has a very good 80-degree afov and so should make a great, low-powered eyepiece for this scope.
But on to M51. Tonight I’m playing the tourist – hey, what’s that? What a neat double star – lavender and white. I mean, I had started at Alkaid as I do when looking for M51, but had gone in the wrong direction and ended up in the outer fringes of Bootes. What I saw, I’m sure, was Kappa Bootes and another, much wider double nearby, Iota Bootes. Don’t you love discovering stuff? Sure, I’ve seen these doubles before, but not for a long time and I couldn’t identify them until I checked the books and charts. So for a while they were my discoveries – kind of a purity there. Once you put a name to them you “tame” them – take away the wild freedom they had for a moment.
But I was looking for M51 and found it of course and was delighted to be able to detect the swirling collision that is called the “Whirlpool.” Funny how we always speak of this one as singular too, though we all know it’s two galaxies, one having passed through the other in all probability, though I can’t remember which is the bumper car and which the bumped.
I then zipped on over behind the bear’s ears to check out M81 and M82. Wow! M81 was a veritable spotlight! Yeah, I’m getting excited about this scope – and also about the night.
At this point I needed to switch to the 15-inch. Much as the 120mm was delighting me, I had just washed the mirror on the 15-inch – something I do only once a year – and I wanted to see how it was performing. Besides, the skies were offering above average transparency. At first glance I was actually a little disappointed. In a strange way I thought the view through the 120mm of M51 was better. But it isn’t. That was just a quick, first impression. As I studied M51 in the 15-inch I saw much, much more. Aperture rules. But there’s an aesthetic to the view through the 120mm that has the 15-inch beat in some ways, and there’s an ambiance – an ease – to using the smaller refractor that makes it both more intimate and more comfortabl to use.
That said – the rest of the night I opted for just plain more – more light – which the 15-inch delivered. M81 leaped out at me, as did the dark clouds crossing M82. And I fairly danced down Markarian’s Chain in Virgo – no strain at all to see seven galaxies in a single field and if I had strained I probably would have seen a few more. But seven blows my mind – hell, one does! And I did swing back to M105 and take a quick look for NGC 3389 and found it with no problem- the 17mm Nagler Type 4 on the 15-inch was a wonderful eyepice for this.
It was midnight by the time my cough returned – as well as some clouds – but before packing up I took one more look at Staurnt hrough the 120mm. Yep – it deserves to be called an apochromatic in myhumble opinion. Yes, if you pay $3-$5,000 more for a similar sized scope I’d expect something more – but except for the hole in my bank account I really don’t know how much difference I would notice.
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