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About this blog

New to Nexstar and computersied scopes I though sharing my experiences may help others

Entries in this blog

 

Ups and downs. Early Days Frustration.

Before I carry on with my 6 SE experiences I just want to thank all of you for reading my ramblings and for your comments and PMs. It is very much appreciated. I finally have some "me" time to continue the story.   The first thing I did when I got my box of goodies home was to unpack everything. A cup of tea came next.   My initial impressions were of a solidly built bit of kit. Without going industrial strength the tripod is sturdy. It is light(ish), but setting it up with legs fully extended and giving it a good "shove" showed that it didn't wobble perceptibly. Granted, the mount may induce more movement but the platform it'll sit on seems good.   The C6 OTA is just stunning. This is my first SCT but I have owned a Mak before (ETX 90) and these physically short catadioptrics, I think, look lovely. The C6 doesn't have the anodised finish the ETX did but the orange paint job looks great. The whole tube has a good weight and a quick twiddle of the focusser felt solid and smooth.   Next out of the box was the mount. Again, a good weighty but not too heavy feel. It's difficult to describe objectively but to me it feels "about right". Slotting the C6 into the dovetail on the mount was easy and I was already feeling comfortable with having gone for the C6 and not the 8" OTA as the weight of everything was manageable. I wouldn't have wanted it to be any heavier, especially as this is, to me, a grab and go set up.   The mount fits into place on the tripod platform really well. There is a centre locating pin and then it's just a matter of rotating the whole assembly until the mount aligns with the fixing bolts in the tripod platform. The platform is cut away in three places which means you can keep a firm grip on the base of the mount as you put it in place. The three sprung captive bolts in the platform find their homes in the base of the mount easily enough with a bit of to and fro wiggling of the mount on the platform. It's all flat and with the OTA pointing down on the mount as it should be at this stage, all very stable. I tighten the three platform to mount bolts a little at a time with frequent jiggles left and right of the mount to ensure everything is square when finally nipped up. Once all in place and tightened, the whole set up feels very solid to me. Certainly moreso than expected. I'm pleased so far.   I knew the mount was going to eat batteries and I'd not managed to get any AAs on the way home so raided our household stash to get up and running. My first objective was simply to mount and align the finder which is of the red dot variety. I've not used a red dot before so was curious to see what it was like.   This is where the first down occurred. I manually swung the OTA to roughly horizontal (you can do this, there is no need to use the Alt drive until aligning) and used the Az drive (you cannot move the mount in Az manually though) to roughly point at a mobile phone mast about a mile away. I'd not done any setup of the goto handset yet, I just switched the mount on and used the up / down and left / right buttons to move the 'scope around. I popped in the star diagonal and standard 25mm eyepiece and centered the top of the mast in the eyepiece. This took a bit of patience while I sighted down the tube and tree / rooftop hopped through the eyepiece to find the mast and work up to the top of it. The 25mm eyepiece gives a magnification of 60x with a field of view of 0.83 degrees-ish (assuming an apparent field of view of the kit eyepiece of 50 degrees here as Googling hasn't turned up a detailed specification) so this took a bit of patience!   The finder bracket was already screwed to the back of the C6 and the red dot finder slides on. Just tighten a couple of philips machine screws to clamp it in place. There are two wheels on the finder to align it - a little like rifle sight adjusters if ever you've used that kind of thing. Sadly, the range of adjustment was not enough to alight the red dot with the aerial mast top I'd centred in the eyepiece. I assumed I'd fitted the finder incorrectly so much removal and refitting followed but still no joy. In the end I decided I'd have to shim the back of the finder mount as even on maximum adjustment the finder was pointing too "high" (i.e. away from the 'scope). My concern was that to do this I'd need to loosen the two screws holding the finder bracket in place and I was worried doing so might disturb something in the C6 tube. I didn't want to assume the threads for these screws were captive no matter how reasonable an assumption that may be. I rigged some shims between the finder and its mount to enable alignment but it was not pretty and certainly not a long term solution.   For a bit of kit costing this much I was very disappointed. The finder, red dot or otherwise, is a critical bit of the setup and I can understand those less handy or ready to give a tweak a go really being put off by this. I did some Googling and found this is a common problem. Or if not common, I didn't have to look too hard to find similar tales of impossible to align finders.   I dropped the shop a line and they could not have dealt with the situation any better. Their recommendation was to shim the back of the finder mount with strips of thin card or plastic, much as I had initially thought of doing. I checked with them it was OK to loosen the finder mount screws and that I'd not be invalidating any warranty by doing so. While the suspicion was the finder mount, without any hesitation the shop arranged for a new finder (without mount) to be sent to me and it arrived within a matter of days. Sadly this didn't fix the problem but at least I'm comfortable with the situation and had the OK from the shop regarding the more permanent solution of shimming the mount. I still think this is poor quality control from Celestron's (manufacturer's) point of view but I wasn't going to let it spoil my fun.   Still being daylight but itching to test the C6 I pointed the 'scope at the bird feeders in the back garden. I'd asked when I bought it if they knew how close it would focus but they didn't. While not being an ideal spotting 'scope I thought it'd be worth a try. I was most impressed when, after much winding of the focus knob (and hoping I'd hit a stop before anything unscrewed completely!) the feeders only some 7 metres away came into focus. Way too high a magnification at 60x to be of practical use but something to bear in mind for when I get that 32mm or 40mm eyepiece! I'm feeling a little happier now so definitely on the way back up.   Completely out of keeping with the first evening of new 'scope ownership the skies were clear that night too! Being early August at the time, I wasn't going to see much in the way of dark skies. Even in winter, being suburban, our back garden suffers from plenty of light pollution and the horizon is poor to three sides. A big reason for wanting kit I could move to darker sites easily. However, I thought a quick test alignment and goto practice was worthwhile so I headed outside to set everything up. My plan was to just look at a couple of my favourite "easy" objects like Epsilon Lyrae and 30 and 31 Cygni.   I carefully levelled the tripod using the supplied (very basic but seems to be adequate) bubble level. Fitting the mount and 'scope (which I'd left on the mount) to the tripod was as straightforward as it had been indoors earlier. I fired up (well, switched on, it was no more dramatic that that I'm afraid) the mount. Initial set up of the goto handset involves entering location and time and date. This was all fairly straightforward as I'd got my lat / long from the phone GPS and just had to remember to enter the date in MM/DD/YYYY format. The time zone is possibly a little confusing in the handset UI as you need to (for the UK) enter GMT and then in the next "screen" select Daylight Savings for BST.   Next up is alignment and I just stuck with the default of SkyAlign where you point the 'scope at three "bright objects" in the sky. Now, to me, bright is a relative term but from our back garden in twilight I felt there was little danger of selecting anything not quite bright enough. The horizon is very poor in our back garden so I couldn't select objects more than about 100 degrees apart. Not ideal but I hoped it'd be good enough. I'd made sure everything else - time, location and levelling - was as accurate as possible. I can't remember which stars I used in the end but I suspect they were Arcturus, Deneb and Vega, or maybe Altair. Either way, I worked through the process and the handset guides you through it well. But on trying to goto the first object I was after, which was back to the first alignment star I'd used, the 'scope shot off in what seemed a totally random direction. Not what I'd expected at all. I tried alignment again but not even close. Disappointment again.   At this point all I wanted to do was look at something as I was running out of time. I manually slewed to Eplsilon Lyrae and hand guided. Even with just the 25mm eyepeice, while I could not separate the doubles of each component, I could make out elongation in each. Not bad. I popped in the 2x barlow and all four stars popped out at me. Optically, I was very pleased with the C6. The 9mm eyepiece split the close doubles even better. I should also say I found the red dot finder really easy to use and still do. Perfectly adequate before fine centering using the 25mm eyepiece.   A day of highs and lows. I'm glad it finished on a high. I was very very impressed with what views I did get. The finder issues could be dealt with although I was unimpressed at the need for hardware tweaks. The goto issues I was pretty sure I could sort with practice and were probably due to my lack of familiarity with the system. I did wonder whether the AA batteries were man enough for the job though, I had read they get used up very quickly. Overall I was on the slightly happy side of neutral but taking encouragement from the excellent views I'd had so far.   I'm going to wrap this post up here. It's gone on a little longer than planned! Next time I'll share what I've done and learned to make this what I now believe the best 'scope I could have chosen given what I was looking for. Thanks for reading

GuyR

GuyR

 

Decisions Decisions. Or, what to buy.

Well, you already know what I bought but it was a bit of a trek getting to the point where I made my final decision. All you have to do is have a quick read around SGL and you'll understand any telescope is a compromise. I'd not had much (if any) exposure to 'scopes other than my TAL-1 Newtonian. That is equatorially mounted with manual slow-mo controls. While it has 1.25" eyepieces, mainstream eyepeices tend not to focus with it - something to do with the small secondary so I think the primary focal point is close to if not within the tube. Anyway, I digress, the TAL-1 is pretty much a closed system so I had no experience, apart from my brief time with my ETX90, of mainstream optics.   This was one of the things I wanted to get away from. Not hard a requirement to meet, I think pretty much every 'scope out there these days is compatible with most mainstream optical accessories.   What else was I after...
I wanted to go up in aperture. Intially my thoughts were along the lines of 200mm. More on that later.   I wanted something easy to store, portable and easy to set up.   I wanted something with, if on an EQ mount, at least an RA drive so I could share views of the night sky with my better half, among others, without having to manually recentre the 'scope on whatever we happened to be observing. If not on an EQ mount, it would probably end up being a goto mount.   I wanted something that I'd want to set up and observe with. I think a very common point made in SGL is that your best 'scope is the one you use most.   Something that could cope with moderate astrophotography would be a nice to have but as spare time is very limited, I am unlikely to have the time to set up serious AP sessions.   I started looking at things like the Celestron Advanced VX 8. The mount / tripod has good reviews and what's not to like about the C8 OTA? I then looked at the dimensions and weights and decided it was not something I'd want to be setting up in the garden at a moment's notice or putting in the car to go out to a darker site with on a whim. It was difficult to remove this setup from the short list as it covers so many astronomy bases, especially if you want to get into astrophotography. But I really did think that at this stage it would be too much of an investment for something that would not get used very often.   Next up was the Skywatcher Explorer 200P on the EQ5, or maybe the HEQ5 Synscan. I see-sawed back and forth on this one. Even up to the day I bought the 6 SE. I liked the idea of an EQ mount, I'm familiar with those. I liked the idea of a Newtonian, I'm familiar with those too. I liked the idea of not having to go full computerised straight away if I didn't feel like it, I could just fit an RA motor and away we go. I then got to thinking (following much reading around) that even though the tripod and mount appear versatile, they do have their limitations so I wouldn't be looking at being able to put a larger tube on in time and AP potential would be limited. The final nail in the coffin was size. EQ mounts are just not that portable, especially if on the tripod as you have the counter weight shaft sticking out. The 200P OTA is pretty hefty too.   I then got looking at the 127mm goto Maks. I loved my ETX90 - amazing views of the planets. But I was also acutely aware of the deep sky limitations. Still, the Skywatcher and Celestron 127Mak goto 'scopes are well priced and very portable. I so very nearly bought one but only the display model was available at the shop I initially visited and I was not overly impressed with the tripod of either 'scope (both were set up in the shop). I know at that price point there are going to be huge compromises but I felt those tripods were just a compromise too far.   Another week or so spent looking at the options. I was keen to look at the Omni 127XLT. C5 is a known quantity and the CG-4 is effectively an EQ3. I arranged with another shop to go have a look at one.   In the meantime, I went back to worrying about the portability of the EQ mount. I then started looking at the Nexstar 5 SE. The 6 SE looked like too big a step up pricewise at this point in my journey. During my research I discovered the difference between the 4/5 SE and 6/8 SE tripods and mounts. Not having the built in EQ wedge on the 6/8 mount was a bit of a shame (I understand the techncal reasons why) but I liked the idea of the extra sturdiness. The 8 SE was tempting but I reckoned I'd struggle with portability on that. In fact the desire for portability was what closed the door on the 200mm 'scopes. The 6 SE was a useful amount more aperture than the 5.   I set off for the shop pretty convinced I was going to come away with a 6 SE but any doubts and I'd walk away.   The shop had a good range set out on display from the Explorer 200P to the little 127 Maks on goto mounts. On seeing the 200P on the EQ5 I knew that would be too big. There was also an Advanced VX with the C8 tube on it and that was (to me) huge as an overall setup. Something for the future perhaps but not now. Seeing the GG-4 EQ mount confirmed that for this 'scope, an EQ mount was not the way to go.   Just seeing and being able to walk around and compare setups all in the same place was the best thing I could have done. The Nexstar SE's compact mount, reasonably sturdy (it's not rigid but it's more than acceptable) tripod and the compact 6" tube (the 8" was just too big and too much more expensive) said it was the 'scope for me at this time. Remember, I wanted something I was as sure as I could be that I'd be getting out and using as often as possible. It'll hopefully go on holiday with us too.   It was a lot of money to spend on a 'scope that compromises in so many ways so I hoped it would live up to expectations. I added a 2x barlow and 9mm eyepiece to my bootful of goodies and headed home.   Next time I'll let you know how I got on with my first motorised, computerised 'scope. The initial confusion and first light!

GuyR

GuyR

 

Intro...

I've had a great time so far with my new Nexstar 6 SE. It hasn't been an entirely smooth journey and I see lots of posts in SGL about these and similar goto 'scopes and problems operating them. I'm no expert but I hope sharing my experiences here will encourage others to persist to the point where using their goto 'scope is a pleasure. I bought the 6 SE about a month / 5 weeks ago so have a bit of catching up to do blog-wise and I must do so before my memory fades!   As background, I used to do a lot of astronomy in the mid '90s, heavily involved with the Jersey Astronomy Club. That's the original Jersey by the way, not the New one ;). I used naked eye, 10x50 binocs and my trusty 110mm TAL1 newtonian, all of which I still have. I also owned an early motorised ETX90 for a few years in the late '90s. Moving to a fully automated goto scope was a big concern for me but I was also looking forward to using more mainstrem optics.   By means of intro, that's me done for now. I'll make time this week to come back and write up the initial part of my journey as far as finally deciding on the Nexstar 6 SE as the 'scope to go for and parting with my hard earned :Envy:.

GuyR

GuyR

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