09-23-2010, 08:17 AM
[quote name='popo' timestamp='1285224960' post='3128']
I look at the minimum area required to create colour output. On a bayer sensor, roughly speaking you're looking at overlapping 2x2 blocks in order to get RGB output, so as a guide its effective full colour linear resolution is perhaps half the sensor count.
[/quote]
Diffraction has nothing to do with the layout of colour. Detail has nothing to do with colour, even.
Diffraction is caused by the lens, it appears in the projected image. That image gets sampled. Diffraction effects on an image are the same for ALL full frame sensors, no matter what resolution and no matter what structure their RGB matrix is. Even similar for a full frame BW sensor.
Diffraction effects on an image are the same too for all 1.5x crop sensors, no matter what resolution or type of sensor. The new Sigma is an 1.5x crop sensor.
The other SIgmas have a 1.7x crop sensor, which is smaller than an 1.5x crop sensor. So obviously, the older SIgmas will enlarge the effects of diffraction on the image more than the new one.
I look at the minimum area required to create colour output. On a bayer sensor, roughly speaking you're looking at overlapping 2x2 blocks in order to get RGB output, so as a guide its effective full colour linear resolution is perhaps half the sensor count.
[/quote]
Diffraction has nothing to do with the layout of colour. Detail has nothing to do with colour, even.
Diffraction is caused by the lens, it appears in the projected image. That image gets sampled. Diffraction effects on an image are the same for ALL full frame sensors, no matter what resolution and no matter what structure their RGB matrix is. Even similar for a full frame BW sensor.
Diffraction effects on an image are the same too for all 1.5x crop sensors, no matter what resolution or type of sensor. The new Sigma is an 1.5x crop sensor.
The other SIgmas have a 1.7x crop sensor, which is smaller than an 1.5x crop sensor. So obviously, the older SIgmas will enlarge the effects of diffraction on the image more than the new one.