OMD with more MP?

Started May 6, 2014 | Questions thread
Great Bustard Forum Pro • Posts: 38,506
Re: Actually...

Steve_ wrote:

Current m43 sensors have all that Canon lacks...

Current mFT sensors have less read noise per area than Canon sensors at low ISO. Other than that, what did you have in mind?

Technologically, current m43 sensors employ the same winning technology found in the Sony-based solutions on APS-C and FF - those same solutions that are making Canons look so dated.

Specifically, the advantage of Sony sensors is, as I said, lower read noise per area for lower ISOs and higher pixel density.

That is not to say m43 sensors can currently produce the same performance as their larger bretheren. One principle reason is already pixel pitch:

16MP 4/3 - 17.3 mm/4608 pixels = .0038 mm/pixel

16MP APS-C - 25.6/4924 = .0048

24MP APS-C - 25.5/6000 = .0040

36MP FF - 36/7360 = .0049

The reason is that mFT sensors don't match FF sensors is that FF sensors gather more light for a given exposure, have more pixels, and the final photo has to be enlarged twice as much for an mFT camera, meaning the lens would have to be twice as sharp, if all else were equal (which it is not).

However, for equivalent photos (same DOF and shutter speed), the same total amount of light will fall on the sensor for all systems (given equally transmissive lenses), so mFT sensors are often at an advantage in lower light due to less read noise per area on the photo due to both the smaller pixels and lower pixel count.

Given where m43 is already at regarding pixel pitch I can see either of the below an advisable or likely marketable solution.

24MP 4/3 - 17.3/5650 = .0031

32MP 4/3 - 17.3/6524 = .0026

Small sensors and high pixel pitches are not as crippling as they were in the past. But there are limits. We are already at those by my standards for noise performance. Come back in a few years and .0026 mm/pixel might be fine - I'm simply not interested now, regardless of how needlessly convoluted this thread has become.

Smaller pixels result in "higher IQ" if the smaller pixels do not result in greater read noise per area on the photo, but often result in "higher IQ" even when the read noise per area on the photo is greater.

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