Need some new eyepieces. Recommendations?
Posted 19 July 2013 - 10:26 AM
Posted 19 July 2013 - 12:49 PM
Posted 19 July 2013 - 12:59 PM
Posted 19 July 2013 - 03:20 PM
Posted 19 July 2013 - 03:25 PM
You said that you were new, so someone has to tell you the truth. You will just be throwing good money after bad - What you really need is a different scope.
Been all through that, starting around 55yrs ago.
Sorry man, but welcome to what we all know.
Posted 19 July 2013 - 04:00 PM
When everyone has given their opinions,and there will be lots of them. You may want to buy second hand. Not as bad as it sounds. I think you may well be in the UK so have a look at www.ukastrobuysell.com Lots of second hand equipment usually due to people upgrading.
Posted 19 July 2013 - 04:05 PM
Posted 19 July 2013 - 04:12 PM
Posted 19 July 2013 - 04:55 PM
A good 6 or 7 mm eyepiece would be useful, but Plossls in that focal length tend to have uncomfortably short eyerelief.
When you get that 6-7 mm EP, go out a few evenings and check what diffraction pattern you see on a medium bright star. Let the scope cool down a bit, perhaps half an hour or more. The star test will ultimately show you if it's your current eyepieces or your telescope's optical quality (or collimation) that prevent you from having decent views.
Posted 19 July 2013 - 05:28 PM
Posted 19 July 2013 - 05:41 PM
Posted 19 July 2013 - 10:09 PM
There are a couple of reasons why Chuck wrote what he did. I'm not the best to explain it. Jon Isaacs, one of the better veterans of CN, has explained it best, but when it comes to telescopes, until at least 4" (102mm), refractors have huge advantages. Clear aperture is one (no central obstruction like newtonians with their 45" diagonal right smack dab in the middle of the objective). As one gets to 5" and beyond, however, reflectors begin to have big advantages. In the first place, the obstruction's effects begin to get overwhelmed by the extra photon collecting power of the correspondingly bigger mirror. OTOH, refractors begin to get exponentially heavier, bulkier, and require increasingly heavier (and therefore harder to move) mounts. And then there are the costs. Below 3", refractors and reflectors are often very close in price. At about 4" and up, however, refractors, just like their weight, clumsiness factor, mount requirements, and costs get increasingly more vexxing. Reflectors, and especially dobsonian reflectors, by contrast, get bigger, too, but rise much more slowly in price, while photon yields take leaps and bounds over their market priced competitive refracor brethren.
But there's another factor, too, and that's your spherical mirror. It produces spherical aberration, which causes the light beams to focus at different points. At low power, this isn't a big issue, but at high power? Problem city
You're right, Hugh, Huygens eyepieces, what you own, are some of the worst, but I'm afraid I'm with Chuck, and would say you might want to turn this in to a pawn shop, take whatever you get, and lay down a bit more cash on something like a 70mm F/10 refractor. These are pretty cheap over here, but of outstanding quality for the moon, planets and such. A 130mm F/5 reflector might be okay, and would have a parabolic mirror, but the collimation design and focusers, at least on the ones here in the US, would deter me and steer me toward a refractor.
I know everything costs more there than here, but I'm afraid in your case I agree with Chuck. Look for a SkyWatcher. These are Chinese, made by Synta, of reasonably good quality, and shouldn't be exorbitantly expensive.
Bon la chance
Posted 19 July 2013 - 11:23 PM
Posted 20 July 2013 - 04:22 AM
Posted 20 July 2013 - 04:26 AM
Posted 20 July 2013 - 04:49 AM
Check out Teleskop Express as well in Germany. It is actually cheaper to buy from there and ship to the UK as opposed to buying new in the UK.
If you will only do lunar, a 70mm refractor is fine. Consider a 4" refractor though which can keep you busy for quite a while.
Stay away from reflectors for a while as there are additional costs (collimation equipment) and learning curve (collimation). If in the future you want a light bucket, then get a "largish" reflector.
For DSO dark skies are a prerequisite so keep that in mind. Moon and the odd planet are just fine from mostly everywhere.
Finally, consider that you need a scope, a tripod & mount, a diagonal, a couple of eyepieces and a Barlow plus a red dot finder. So, give us your budget and we'll try to provide some recommendations!
Posted 20 July 2013 - 05:38 AM
Or a larger 6" reflector. Keep the telescope suggestions coming!
Skywatcher Skyliner-150P / Classic 6" f/8 parabolic Dobsonian
Posted 20 July 2013 - 05:40 AM
If the budget of $75-100 is per an eyepiece, than no problem, buy Explore Scientifics. If it's a total, than buy a couple of inexpensive plossls, like 20mm and 15mm and 2x barlow. Than you'll have 20, 15, 10 and 7.5mm. And practice, don't miss the nights with good seeing .
If you will want to get a new scope instead, than you'd better buy 6-8" Dobson. Best bung for the buck. The 70mm refractor isn't much better than your reflector unless it's expensive APO, IMO.
Posted 20 July 2013 - 06:03 AM
Posted 20 July 2013 - 06:03 AM
Posted 20 July 2013 - 06:23 AM
Posted 20 July 2013 - 06:37 AM
Just some of the spec
Maginifications (with eyepieces supplied) - x26 & x65
Highest Practical Power (Potential) - (x260)
Diameter of Primary Mirror - 130mm
Telescope Focal Length - 650mm (f/5)
Parabolic Primary Mirror
Eyepieces Supplied - (1.25") 10mm & 25mm
Single-arm Secondary Mirror Support
Wooden Alt-Azimuth Mount
Red Dot Finder
Collapsible/Extendable Tube Assembly
Overall Maximum Height - 46cm (collapsed), 69.5cm (extended)
Built-in carrying handle.
30% more Light Gathering than 114mm.
The name of it is
Skywatcher HERITAGE-130P FlexTubeTM 130mm Parabolic Dobsonian Telescope
what are peoples thoughts on this? I will buy some new eyepieces for it aswell.
Posted 20 July 2013 - 07:32 AM
The little Heritage is a excellent scope. I had one for my grandchildren for a while. Easy to use and easy to store with remarkable optics for the price. They do pop up from time to time on ukastrobuysell. They do come with a couple of Plossl eyepieces which would give you okay views. The focuser is a helical focuser and does need a couple of winds with some PTFE tape to make it a little stiffer. This scope would do you nicely.
On the software front you can download Stellarium www.stellarium.org which is FREE. It's a great piece of free software which will be of great help finding your way around.
Posted 20 July 2013 - 08:39 AM
A refractor option is the Skywatcher Evostar 90 f10 on EQ2 which comes with the essentials to start observing.
But, there are possible choices in the UK which are much much better and well worth marginally increasing your budget:
You could always try to negotiate a small reduction in price to match your budget.
But do try to get as much aperture for your money as possible!
Posted 20 July 2013 - 01:59 PM