Can we do anything to keep this forum focused on Pinsta camera and avoid spanners or posts and responses that are not related to this topic ??? What about a moderation process before a post goes live?

How do I move from the exposure time from a traditional lightmeter to one that is useful for Pinsta? Example: Lightmeter: ISO = 100, f = 11, exposure time = 1/2 seconds What is the equation I need to use to find the exposure time for ISO = 2 and f = 209 ?