Thread: 1.25 inch filters
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Old 20-12-2020, 09:09 AM
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DiscoDuck (Paul)
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DiscoDuck is offline 		 
Join Date: Apr 2014
Location: Adelaide
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Paul, it depends also on your scope's focal ratio. There is a calculator here https://astronomy.tools/calculators/ccd_filter_size where you can plug in your numbers.
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