Using a focal reducer on the Celestron C-5 spotting scope: Astrophotography Talk Forum Forum: Digital Photography Review
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Multiple Focal Reducer Spacing - Electronically Assisted Astronomy (No Post-Processing) - Cloudy Nights
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Celestron Reductor de focal 0,7x para tubo óptico Edge HD de 8" - Astrofotografía - Accesorios - Aire Libre Shop
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