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Hi Shane and thanks for the explanation.
As a scenario,
if I was imaging for 30 seconds @ f/10 and at a setting of say ISO 600. If I then changed to f/3.3 via a focal reducer I could then take the same 30 second image with a higher ISO speed say ISO 800 for example.
Does that sound right or have I gone off on a tangent.
Cheers
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