How to properly compare RX-100 and NEX-6 kit high ISO noise?

Started Apr 29, 2013 | Discussions thread
calterg
Regular MemberPosts: 450
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Re: How to properly compare RX-100 and NEX-6 kit high ISO noise?
In reply to Vlad4D, May 1, 2013

Vlad4D wrote:

There is common opinion that small sensor is bad for low light. But small sensor also allows to use smaller lens with bigger aperture value.

For example maximum aperture on RX-100 at 10mm (28mm equiv.) is F1.8. NEX-6 with kit lens can do only around F4.0 at 19mm (28mm equiv.). It means RX-100 sensor can gets about 2 stops more light than NEX-6 sensor? Am I right?

There is also a multiplier for the aperture, which advertising companies take care to ignore.

The rx-100 at 10 mm has a multiplier of 2.8 to get ff equivalent of 28mm; therefore also multiply its F1.8 by also 2.8, resulting in an equivalent aperture of F5.0.

The Nex 6 has a multiplier of 1.5, therefore its equivalent aperture is F4.0 x 1.5 = F6.0 at 28mm.

So it is an advantage of less than a third of a stop and not 2 stops at 28mm.

You just can't help loving the advertising industry.

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