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10 ecommerce web hosting. Auto Loan, Home Loan and Insurance. All astronomical telescopes, large or small, share a common goal to brighten and magnify your views of celestial bodies. Refractors,. Telescopes do their jobs in different ways each with its own benefits and drawbacks. Yet many fundamentals apply to any telescope. Of primary importance is a telescope's aperture:. The diameter of its light-gathering lens or mirror. (That lens or mirror is often referred to as a telescope's objective. Will gener...