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Types Of Telescopes For Astronomy http://www.lucidtelescopes.com/ of a telescope is always to gather light, not to magnify an image (the eyepiece does that job). The bigger the objective (the part that collects the light) regardless of whether it be a lens, in refractors, or possibly a mirror, in reflectors, the more light the telescope will collect. The more light it is possible to collect, the more detail you will have the ability to capture, and also critical for astrophotography, the shorter your exposures will must be to capture this detail.