ISO 800+ -- high noise

Started 2 months ago | Discussions thread
threw the lens
threw the lens Senior Member • Posts: 1,638
Re: ISO 800+ -- high noise

GivenToFly wrote:

So what you're saying is that if a one inch sensor and an APS-C are shot at the same focal length, aperture, and shutter speed, the APS-C could have an ISO about 1.5 times greater than the one inch and would not produce greater noise?

No, you get 3x the noise performance because the bigger sensor is the same generation but 3x bigger.

Each iso stop means 2x, and two stops means 4x. 2-4-8-16-32 etc.

But beware of using a slow lens on APS-C ... it will put you back where you started.

If you want better low light performance, you need a bigger sensor or wider aperture lens. Using a standard fast zoom at f2.8 will give you 1.3 stops worse than your f1.8 at wideangle, but the APS-C sensor gives 1.5+ stops better. You will not notice a profound difference with most zooms. You have to go for a faster prime lens to see a profound difference. That may not suit you and you may just have to use a tripod more often. For the cafe shot you could have used off camera lighting to fill in those deep shadows in particular.

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