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How to favour exposure time over ISO?

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So let’s start the ball rolling. This is a question that has been asked in many different guises on the TLV FaceBook page.

Supposing we know what the final exposure should be for a night exposure (good old 500 rule) and we want to keep the ISO as low as possible, how do we config that?

In my experience I often end up with an exposure time lower than my target and an ISO that is higher. The overall exposure is often correct.

1

Hi all,

it depends actually on what kinda timelapse you try to make. And the conditions you are making your timelapse , clouded or not , dusk , full sun,….  .

My preferrence i also exposure first than iso to be honest. Certainly when i try to make astro-timelapse where my exposures are going above the 30s. because i’m afraid my images get to blurry otherwise. i’m even go most of the time not higher than 800-1600. but this has more to do with the lightpollution where i live than thinking about the noise 🙂

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