Quote:
Originally Posted by asimov
Sounds about right mate. I have the C11 also & that pretty well sums up my visual views. You might want to look at cooling the OTA before using it. It'll help.
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Yep. Cooling makes a huge different. I have modded the primary cell a while back to install fans and get rid of tube currents. They are an image killer.
Quote:
Originally Posted by sjastro
Marc,
Like any mass produced scope quality can be variable, but if you are fortunate enough to have a good quality scope the performance is excellent under good seeing conditions.
My best memories of my C11 was the spectacular views of Jupiter.
Regards
Steven
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I have no problem believing that Steven. They perform extremely well when properly aligned.
Quote:
Originally Posted by supanova
Unfortunately with Celestron manufacturing offshore,the quality became variable and so did the image quality.Some of the newer ones seem to give quite good images,others quite bad images.Some are reasonably sharp,some give images that appear washed out with poor contrast.I have only come across 1 of the newer type ie Black metal or carbon fibre tube C11's that give an image anywhere near as good as my old Orange tube C11.And have not come across any that have as little mirror shift.The price we pay for mass production I guess.And oh yes ,my old scope still gives fantastic images of Jupiter.
Wayne
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It's all about aligning and collimating I guess.
Quote:
Originally Posted by coldspace
 , Mark step that magnification back, 6mm with 2 X barlow will give over 900 magnification, I am suprised you got any detail at all and the images would have just been plain big shimmering blobs and impossible to focus.
Very,very,very rarley do I push my 12R past 400X.
Try about 200 you will see a remarkable difference only image scale will be alot smaller.
I get comparatable views with my cooled down Meade 12R,and 17mm Ethos at about 180X to some of the good solar system images you see on good steady nights only with alot less image scale.
Better to have a nice crisp/small image in the eyepiece than a big blurry blob.
Your C11 should perform well at lower magnifications, I can not see why your optics will be any different to mine except that from my experience the ACF optics are a tad sharper visually but I have seen excellent visual views through a new C11 and C9.25 on planets and deep sky from dark skies. Try again with alot lower magnification you will be suprised.
Regards Matt. |
Thanks Matt. Pushing magnification is the only way to see if alignment or collimation holds. At low magnification anything looks good
