a7s goes up to 409600 ISO, and some would say the results at 80000 ISO are pretty damn usable [<a href="http:&#x2F;&#x2F;philipbloom.net&#x2F;blog&#x2F;a7s&#x2F;" rel="nofollow">http:&#x2F;&#x2F;philipbloom.net&#x2F;blog&#x2F;a7s&#x2F;</a>]!