Bottletopburly Posted July 6, 2023 Share Posted July 6, 2023 Can anyone suggest what f number to use with my canon lens 100-400 the idea is to be able to frame some larger targets with the 533mc especially Andromeda. Link to comment Share on other sites More sharing options...
Clive Posted July 6, 2023 Share Posted July 6, 2023 (edited) With the sensor size of the 533MC if you want to fit in M31 then I guess you'll won't be going above 200mm to fit it all in. With that lens I think F5.6 should give decent results in the 100 to 200mm range. Edited July 6, 2023 by Clive Typo Bottletopburly 1 Link to comment Share on other sites More sharing options...
Bottletopburly Posted July 6, 2023 Author Share Posted July 6, 2023 1 hour ago, Clive said: With the sensor size of the 533MC if you want to fit in M31 then I guess you'll won't be going above 200mm to fit it all in. With that lens I think F5.6 should give decent results in the 100 to 200mm range. Thanks Clive 👍 Link to comment Share on other sites More sharing options...
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