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Focal Reducers With Field Flatteners

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Focal Reducers With Field Flatteners

TelescopeTown.com Tip: Focal reducers often have specifications distinguishing them by focal ratio. For instance, focal reducers with a focal ratio of f/6.3 reduce a telescope's focal ratio by .63 times. A f/6.3 focal reducer can shorten your exposure time by up to 50%.

   

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