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The latest edition of the Binocular Sky Newsletter is ready. As well as the usual overview of DSOs, variable and double stars, this month we have:
* Uranus and Neptune are back (just!)
* A couple of Mira variables near maximum
* Ceres is still available
* Review of the Bino Bandit
I hope it helps you to get the best out of these short summer nights with your binoculars or small telescopes.
To pick up your free copy, just head over to http://binocularsky.com and click on the Newsletter tab. You can also subscribe (also free) and have it emailed each month.
Hey guys,im currently on a school trip and brought my celestron firstscope with, tonight we ll be trying some dsos and maybe saturn and jupiter,the telescope itself is not collimated and dirty (on the mirrors)So I wanted to ask.in the scope, there is no primary adjustment screws,only the ones to take it off .Does that mean that its set , allowing me to take it off wash it and back on without having to recollimate the primary?
To put this in perspective, I bought my first SCT nearly ten years ago. And in all that time, there has been one word that has scared me witless (no, that's not a spelling mistake ) ... collimation!!!!
There are so many horror strories around of people scratching corrector plates and simply messing it up completely and making a scope unusable, that I have always avoided it like the plague ... once even preferring to sell the scope I had and buy another one to avoid having to do it [don't you just love the logic of that one?particularly when there is no guarantee they will arrive collimated!]. I've always belonged to the "I don't care about winning, I just don't want to lose" brigade.
Six months ago, I bought an RC6 and recently picked-up a cheshire eyepiece. No corrector plate ("But don't drop the allen key into the tube," the websites warn!). If I'm ever going to do this, now is the time. A quick look earlier this week showed the dot well out of position, so yesterday ... I procrastinated ... o come on, you didn't think it was going to be that easy, did you? But there are clear skies predicted for tonight, so this morning I went outside, set up my NEQ6, plonked the RC6 onto it, pointed it slightly downwards and went and made a cup of coffee. Returning to the scope I started to have a play.
I kid you not. In less time than it had taken me to set up (excluding the coffee), I had the black dot slap-bang in the middle of my white circle. The allen bolts were tight, yes, but not "wheel-nut" tight; not "you need three feet of metal bar wrapped around the allen key to lean on in order to loosen it" tight. And yes, my first move was in the wrong direction ... so what??? It was so monumentally, stupidly easy ... why all the horror stories on the internet?
Am I pleased I set it up outside where there was plenty of space, rather than struggling in the lounge? Yes. Am I pleased I got a cheshire so I could do it in daylight? Yes. Were the ten years of worry that I had endured dreading this day a waste of energy? You bet!
So my message is to anyone who looks at the word "collimation" and immediately becomes a rabbit in headlights ... Action Cures Fear ... seriously, just do it ... if I can do it, ANYONE can.
Guys , i am so frustrated .I can't collimate my newt. I m here with my chesire eyepiece trying to adjust the secondary but when i turn the centre screw, the mirror moves a lot and then shifts back to where it was. And turning the little screws arouns it ddnt so much either. I don't have much time before my session (2 hrs) pls help
As a farely new member and astronomer, I've decided to seek help for collimation.
The task seems pretty daunting at first but I think I got the basics down.
Unfortunately I cannot find any answers for the questions I have, so here it is: Is it 'normal' to see the focuser's end?
As you can see in the attached picture (poor quality, let me know if I should do another) we can see a rectangle at the left, the focuser.
I don't think I should be seeing this and I don't know what causes the problem since the secondary 'seems' to be aligned and the doughnut is dead center.
I'm using a XT10 and the focuser is all the way in.
Thanks for your precious time,