So how much is 1/3 stop of light loss? Samples!

Started Jan 2, 2012 | Discussions thread
tbcass Forum Pro • Posts: 38,220
Re: Its approx 1/2 stop light loss

jonas ar wrote:

Looking at the quantum efficiency data at (derived from DXomark), Nex7 is 47% and a77 is 35%

That corresponds to a 0.43 stop loss, and i believe it is safe to assume that this difference i solely due to the mirror?

That is correct and is why he loss is often claimed to be 1/3 to 1/2 stop.

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