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Using filters

Filters are an essential part of an amateur astronomer's arsenal.
Most backyard observers want to see as much detail as possible in as many objects as possible. Yet those two goals often conflict and usually can't be satisfied simultaneously. Seeing the most objects requires a big telescope that can gather lots of light to pull in the faint denizens of the night sky. Seeing great detail requires high contrast, which allows an observer to separate an object or region from its surroundings.Filters typically provide the best way to boost contrast. All filters wor...

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