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According to thumbs rule you can't go beyond 150* I think you are using celestron first scope try some filters don't buy good eyepieces buy a telescope either


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The key issue for a telescope is not magnification but light gathering capability - which is (crudely) the size of the main aperture. Thus a 90x magification on a very large (wide) telescope would let you see a very large number of things (if you are in an area where the sky is dark), but 90x on a small telescope would let you see a number of interesting ...


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If you're interested in a low cost, but usable telescope that provides decent performance, look into the Galileoscope. http://galileoscope.org/ It provides 50 mm (2 in) of aperture, at a focal length of 500 mm - so it's an f/10 instrument. The kit is very easy to assemble, and instructions are provided on the Internet in great detail. Even kids can ...


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ALMA is the main example of radio-telescope located in Chile. And, what an example! the most powerful radio-telescope in the world working at millimetre and sub-millimetre frequencies. Although there are bigger single dish radio-telescopes in other places, ALMA outperforms them in general. A bigger radio-telescope has a higher sensitivity because it collects ...


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There are radio telescopes at many sites in the southern hemisphere. Here's a list. Chile has a big one going in at Llano de Chajnantor and several already operational. See second link for details.


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Yes, but many (not all) telescopes made for astronomy will invert the image. Presenting the image upright is important for terrestrial instruments, but it doesn't matter for astronomy. Also, it usually requires fewer optical components to make an instrument that inverts the image. Also, terrestrial instruments are made to operate in an environment where ...


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Yes. Most consumer telescopes can be used for terrestrial viewing (or at least the ones I have used) and are often utilized for wildlife viewing or other uses for extreme telephoto requirements. The manual doesn't list the minimum focus distance (usually the information provided for photographic lens to describe how near they can focus), but the manual does ...


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Several points need to be made. 1. Performance The performance of the whole optical stack is incredibly resilient w.r.t. small spots on the primary mirror. The mirror might look visually very, very dirty, but the performance of the whole instrument will remain essentially the same. Even if you chip the mirror at the edge, it shouldn't matter. Take a marker ...



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