This article should be read by everybody

Started Dec 12, 2013 | Discussions thread
Nordstjernen
Nordstjernen Veteran Member • Posts: 6,876
Re: Hard to bust the large vs small pixel myth
4

K E Hoffman wrote:

Yes you can't assume a higher res sensor will have more noise than another lower res camera or the previous model.. but it would have more than a sensor with the same design and larger photo reception sites.

The core of misconception:

K. E. Hoffman writes: " ... but it would have more than a sensor with the same design and larger photo reception sites."

No, the size/the numbers of photo reception sites does NOT affect the amount of noise for sensors of the same size! What matters is the light-gathering power of the sensor, that is the surface area, which is given by the physical size of the sensor.

So for a 12 Mp, 24 Mp and 36 Mp FF sensor the amount of digital noise will be more or less the same, but the characteristics of the noise might be a bit different.

The same would be true for a 12 Mp, 24 Mp and 36 Mp aps-c sensor.

You can't compare pixel by pixel. You have to compare pictures of the same size. Then the noise level will be almost identical, but the high res sensors will show more detail.

The main reason for this is better micro lenses with almost no gap between the photo sites and also much better noise reduction at the A/D level, before the raw files are written.

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