Why not a 21.6mm x 21.6mm sensor?

Started Jan 23, 2013 | Discussions thread
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Great Bustard OP Forum Pro • Posts: 33,757
Re: So...

reygon wrote:

The film academy, who also uses same camera and lenses principles, came up with 4:3 being the ideal ratio for projecting on a screen. It used most of the image circle a lens produced. It was known as the Academy Ratio.

Leaving aside the dubious claim that 4:3 is "the ideal ratio for projecting on a screen", 4:3 does not use the most of the image circle of other aspect ratios (that honor falls to 1:1).  In any case, I'm talking about a sensor that circumscribes the image circle, not a sensor that is inscribed in the image circle, so all aspect ratios can be used with 100% efficiency.

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