a7S high ISO claim - - -over hyped or not ?

Started Jul 3, 2014 | Discussions thread
JimKasson
JimKasson Forum Pro • Posts: 13,667
Re: a7S high ISO claim - - -over hyped or not ?

Rishi Sanyal wrote:

I understand that. DxO uses a cutoff of SNR=1. You may or may not agree with that cutoff, but it does account for read noise difference between cameras. Higher SNR cutoffs for DR measurements lead to DR measurements being more & more affected by shot noise - providing less and less discrimination between similar-size sensors with different read noise performances. Ultimately telling you more about sensor size, not sensor performance.

Or you can present a curve and let the readers pick their own cutoffs:

Details here .

Jim

http://blog.kasson.com

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