10-02-2010, 01:44 PM
[quote name='Brightcolours' timestamp='1285930459' post='3420']
It is not just a claim. Sharpness does not come from the colour information, but from luminance information. The luminance information is based on the information per pixel, mostly.
So, yes, a Bayer sensor without AA-filter gets about the same resolution as a foveon sensor without AA-filter.
[/quote]
You mean when you compare an "X" megapixel Bayer CFA to a X/3 megapixel Foveon, right?
[quote name='Brightcolours' timestamp='1285952639' post='3435']
I am not against foveon sensors, Sigma cameras or AA-filterless cameras at all. I am merely explaining that the extra "sharpness" is an effect of the lack of AA-filter, not so much of it not being a non-bayer CFA sensor.
[/quote]
Sorry but that's absolutely not true and there are heaps of evidence out there. To start with, have you used an AA-filterless Bayer camera?
[quote name='Brightcolours' timestamp='1285952639' post='3435']
And the foveon sensor has a bigger problem than aliasing: due to the nature of the sensor it will be more noisy at higher ISO settings.
[/quote]
That maybe so but most people don't know how to compare resolution between a Foveon and a Bayer image with the resolution equalised. Otherwise it's just like saying the 5DII has more noise than a D3... of course because one has more detail than the other but when you equalise the resolution, that is not the case anymore.
It is not just a claim. Sharpness does not come from the colour information, but from luminance information. The luminance information is based on the information per pixel, mostly.
So, yes, a Bayer sensor without AA-filter gets about the same resolution as a foveon sensor without AA-filter.
[/quote]
You mean when you compare an "X" megapixel Bayer CFA to a X/3 megapixel Foveon, right?
[quote name='Brightcolours' timestamp='1285952639' post='3435']
I am not against foveon sensors, Sigma cameras or AA-filterless cameras at all. I am merely explaining that the extra "sharpness" is an effect of the lack of AA-filter, not so much of it not being a non-bayer CFA sensor.
[/quote]
Sorry but that's absolutely not true and there are heaps of evidence out there. To start with, have you used an AA-filterless Bayer camera?
[quote name='Brightcolours' timestamp='1285952639' post='3435']
And the foveon sensor has a bigger problem than aliasing: due to the nature of the sensor it will be more noisy at higher ISO settings.
[/quote]
That maybe so but most people don't know how to compare resolution between a Foveon and a Bayer image with the resolution equalised. Otherwise it's just like saying the 5DII has more noise than a D3... of course because one has more detail than the other but when you equalise the resolution, that is not the case anymore.