ApolloHoax.net
Off Topic => General Discussion => Topic started by: Bryanpoprobson on March 11, 2017, 08:39:06 AM
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I used to have a big (16") beast permanently set up on my roof in Spain. I am back in the UK with it's light pollution and thinking of investing in an 8" Celestron Nexstar evolution as it is easily removed from the arm and the tube can be carried separately. I was originally look at a Meade, but the tube is hard to remove from the mount. Anyone familiar with the subject matter wants to give some advice? I've always been a hands on with motordriven EQ mont man, I am a novice with all this new fangled computer driven mumbo juumbo.
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It depends on what you are wanting to achieve. Lunar imaging? Visual only? Grab and go?
An 8" SCT will take a fair bit of cooling down, so it mightn't be the thing for a grab'n'go rig. Using it once it's cooled is easy...the newer GOTOs are very easy. Personally, I'd steer away from the Meades...good optics but their electronics and mechanicals are not supposed to be as reliable. This might be an Internet rumour, but Ive seen plenty of bad stories about failures and poor after sales support.
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Technically it won't be grab and go as it will be stored in a summerhouse outside, but portability is an issue as I will have to move the rig into position. This has ruled out the Meade for me. I have changed my mind a little and may opt for the 9.25 nexstar evolution, this should allow me to a little planetary and lunar obs. The crap skys in the UK stop me doing much else. I am not planing to do much in the way of long exposure photography just a lot of visuals. I understand that these type of telescopes are not that good for long exposures anyway due to rotation of the object (although this can be achieved with add ons if I decide I want to do that).
What I'd really like to do is have a play with various rigs to see what suits. I do like this idea of the telescope being a wifi hub and driving it from an ipad app.
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I got a 60mm achromatic refractor for exactly that reason. Only moon and planets are much of an option.
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Long exposure imaging is ruled out by the alt-az mount. Plus a slow f10, long focal length scope is the last thing that you should consider for DSO imaging.
I understand that these type of telescopes are not that good for long exposures anyway due to rotation of the object (although this can be achieved with add ons if I decide I want to do that).
Technically, yes. You could mount the whole shebang on a wedge. And use a focal reducer to get it to f6.3. You could also commute on a pogo stick- you'll get there eventually, but it'll be slow, painful and you'll quickly realise that there are much better solutions available. There are very good reasons that the vast majority of people that do DSO imaging do not use a wedge-mounted SCT- it's an exercise in frustration.
A 9.25" is a weapon for Lunar and planetary imaging or visual. perhaps you should also consider a Maksutov. The Skywatcher f15 180mm Maksutov is a beast for planetary imaging.
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Good information...
From the couple of sites I visited the Wedge mounting was described a simple fix, obviously it is not. Any way I will not rush into a decision. :)
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Well after weighing up my options and carefully considering all my options...... My wife went out and bought the 9.25 Nexstar Evolution for me as a Birthday present as it came up on my browsing history. It arrived today, just before two days of overcast skies here in the UK. Ah well at least the decision was taken out of my hands, I would have still been pondering it over two months hence. Let's hope it works out.
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From the couple of sites I visited the Wedge mounting was described a simple fix, obviously it is not. Any way I will not rush into a decision. :)
It's not. its a sub-optimal solution.
Well after weighing up my options and carefully considering all my options...... My wife went out and bought the 9.25 Nexstar Evolution for me as a Birthday present as it came up on my browsing history. It arrived today, just before two days of overcast skies here in the UK. Ah well at least the decision was taken out of my hands, I would have still been pondering it over two months hence. Let's hope it works out.
Well. that solves the problem of indecision!
It's fine piece of kit for observation and Lunar/planetary imaging. Enjoy it...the 9.25" is often referred to as a jewel in Celestron's crown.
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Thank you for the useful replies, when I get a chance in the next couple of weeks I will post a review if any one is interested.
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Thank you for the useful replies, when I get a chance in the next couple of weeks I will post a review if any one is interested.
You're in the UK now - you'll need to cross everything you have for clear skies... ;D
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You're in the UK now - you'll need to cross everything you have for clear skies... ;D
Funnily enough, when I was in Spain there were plenty of clear skies, but the light pollution was just as bad. The other thing is, the images are sharper in the UK on a cold clear night than they are in Spain on a hot balmy night. :)
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Is there a telescope that is recommended for beginners? I just figure I might like to watch the night sky on occasion, no serious interest. I'm in a regional area so light pollution is minimal but still present.
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Get a pair of decent binoculars. They're cheap ane easy to use. Scanning the Mill Way with binos is always a pleasure.
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For the love of God man have you learned nothing about being married??
ERASE YOUR BROWSER HISTORY!
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Get a pair of decent binoculars. They're cheap ane easy to use. Scanning the Mill Way with binos is always a pleasure.
You can get mounts for them too to keep them steady. My £50 pair are good enough to pick out Jupiter's moons in ideal conditions :)
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For the love of God man have you learned nothing about being married??
ERASE YOUR BROWSER HISTORY!
;D
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Get a pair of decent binoculars. They're cheap ane easy to use. Scanning the Mill Way with binos is always a pleasure.
No..I'm not dyslexic. The spelling is the result of predictive text, fat fingers and an Android phone. >:(
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Set-up night
(http://i65.tinypic.com/k17tvn.jpg)
Very easy to set up and collimate, just a quick bit of observing tonight to get used to it. Need some time to do some proper observing, perhaps next week if the sky is kind..
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Very easy to set up and collimate, just a quick bit of observing tonight to get used to it.
Very nice!
Get some Bob's Knobs....they make collimation very easy. Having said that, there's no need to become obsessive about collimation unless you're into planetary imaging.
Need some time to do some proper observing, perhaps next week if the sky is kind..
You've condemned us to more weeks of cloud now... :P
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Did have a few problems with the set-up I can't get the laser pointer aligned properly. I did think the GO TO function had a mind of it's own until I realised I had to change to manual align. :o But with a 40mm eyepiece and a nice early evening constellation of Orion, I could align the scope directly to Betelgeuse, Rigel and Sirius.
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Well have finally had an early evening observing session in twilight rather than dark skies, even then WOW.. I've been away plus my daughter got married and work piled up in my absence. Managed to fathom the alignment finally (the telescope wasn't 100% level initially, this was probably why I had so many problems before). But even with just some lunar obs and Jupiter. Magnificent views of the clouds, clearest telescopic views I've ever seen with my own eyes. As for the Moon, zoomed in on the central peak of Tycho even the wife was impressed when she had a look. One small problem, when the iPad lost connection my alignment went out. But overall very impressed.