OMD with more MP?

Started May 6, 2014 | Questions thread
Steve_ Senior Member • Posts: 2,869
Re: Actually...

Great Bustard wrote:

Steve_ wrote:

Smaller pixels result in "higher IQ" if the smaller pixels do not result in greater read noise per area on the photo ...

That's a pretty big if.

Not really. For example, the 16 MP EM5 has less read noise per area than the 12 MP EP3.

This is not a relevant statement. If the improved noise characteristics of the EM5 sensor were a result of its finer pixel pitch they would just have made those 12MP sensor 16 instead.

Perhaps that is one reason the D800 doesn't sport anything like a .0026mm/pixel pitch.

For any given tech and sensor size, there is a "sweet spot" for pixel count, and this "sweet spot" is continuously moving towards larger and larger pixel counts with successive generations of sensors.

I have stated that higher resolutions and finer pixel pitches are possible due to improved sensor technology. Strangely enough you at that point flail away at the pixel-size dead horse, implying that nothing else has or will change and that read noise will somehow hold constant. Now at this juncture you admit that other facets of sensor technology enable a particular pixel count (and thus pitch at the same sensor size). This is what I have been saying all along... Sensor technology is not currently sufficiently advanced as to permit the .0026mm/pixel pitch that results from a 32MP m43 sensor to produce adequate results.

And I'd be surprised if its successor does, either. If I do the math correctly that would produce a 128MP solution.

The thing is, more pixels result in more resolution, regardless of the lens (of course, the sharper the lens, the more resolution you'll get). More resolution means more latitude for NR (noise reduction). So, even if more pixels are intrinsically more noisy, depending on how much more noisy, the greater pixel count will still result in more detail with the same or less noise with appropriate processing.

It's the 'depending on how much more noisy' part that has been understated in your comments. By the time you get to the pixel pitches proposed in this thread, the gains from the increase in sensor resolution will be swamped by the increase in noise, perhaps even at base ISO.

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