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With a 158 kilometers of diameter Ptolemaeus may be spotted just using 10x magnification, through binoculars or telescopes. Small craters may be observed inside, but only using high power telescopes. In this image one of them is clearly visible and another smaller one may be guess to the West.
by Anonymous on 2009-05-04
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2015-11-13 11:52:27       
Would it be benificial for me to add the close up fltier (canon 500d) to my macro lens (canon 100mm f2.8L) I’m planning on shooting butterflies and dragon fliesThank you, great article
 
2015-10-18 16:15:40       
i like hearing sandy's strtaade updates on NPR!ian... i didnt initially notice that i chose such such potentially incriminating pictures to display here!! hahaha! thanks for pointing that out. its true... i'm a climber!
 
2012-10-07 18:28:07       
I've never used it but it's looks very well built and it will collect a liltte more light than a reflector of the same size.You will be able to see a fair number of things with this telescope, and you will probably get some very nice views of the planets.The drawback is the price and the optics. Do you want to pay that much when you can get a reflector of similar quality that performs in a similar manner for half the price? Do you care that the telescope is an achromatic refractor instead of apochromatic? You might get a noticable degree of chromatic aberration on the higher magnifications, and certainly if you do astrophotography.To many, the benefits of having a large achromatic refractor (more definition, more rugged,liltte collimation) outweight the cons though.I would say this is probably a good telescope if you want to dish out the money and don't mind the chromatic aberration.
 
2011-08-20 17:20:05       
THX that's a great asewnr!
 
2011-04-11 22:34:58       
YZgv2R YMMD with that answer! TX
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