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EXCERPT page containing first few paragraphs. 2023-12-02 00:33:53

Frame Averaging Case Study: Granite Dome After Sunset

See also other information on frame averaging.

This case study shows the benefits of frame averaging, comparing a single frame to 2 frames and 9 frames in an extreme dynamic range situation in which a maximum shadow boost and other contrast control measures were needed.

For this image, I wished to preserve all the detail in the sunset sky and have excellent detail in the black shadow areas.

As it turns out, gross error in the Sony A7R IV histogram misled me*; I could have shot just two frames with better exposure in total than the 9 frames shown here! Yet the example as shown is perhaps more instructive, in that it shows how frame averaging can compensate for underexposure errors, either by the user or the camera.

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Grossly misleading Sony A7R IV histogram—shows maximal exposure for 2.5 stops underexposure
Extreme dynamic range scene

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