Trick: correctly pushing D800 to higher (ISO) limits

Started Mar 29, 2012 | Discussions thread
RicksAstro Veteran Member • Posts: 3,853
Re: Trick: correctly pushing D800 to higher (ISO) limits

Yup...that's a trick that's been used for years in the astronomy world, and is actually what the camera does when you have long exposure noise reduction on. You're actually doing more towards a dark frame subtraction since it changes based on your exposure. Technically, a bias frame is a frame taken at the shortest possible exposure.

If you do the library idea, it's actually best to average a bunch of frames together to avoid adding random noise to your image.

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