01-13-2011, 08:35 PM
[quote name='turboman' timestamp='1294751912' post='5418']
I understand this. That is why I cannot explain the obervations I made, repeated here again:
- Zeiss data (only lens) show same resolution in corner for 4/3 sensor size.
- Photozone (lens Zeiss + NEX-5 sensor)show much lower corner resolution.
Simplistic conclusion would be that NEX-5 sensor has low corner resolution.
[/quote]
Sensor design is uniform across its area except in the case of the M8, M9 and the recent Fuji X100 sensor where they have the off-set micro-lenses. So other sensors can't possibly have absolute resolution figures that differ in the corners from the center.
Like Klaus said, PZ numbers are from a camera system and not just the lens alone. Leaving experiment errors aside, it's possible that one lens suits a sensor better than another. For example, one lens might be more tele-centric than the other.
However, how the PZ "border" and "extreme border" values are fairly meaningless in practice as I have explained below:
http://www.flickr.com/photos/genotypewriter/5207301499/
GTW
I understand this. That is why I cannot explain the obervations I made, repeated here again:
- Zeiss data (only lens) show same resolution in corner for 4/3 sensor size.
- Photozone (lens Zeiss + NEX-5 sensor)show much lower corner resolution.
Simplistic conclusion would be that NEX-5 sensor has low corner resolution.
[/quote]
Sensor design is uniform across its area except in the case of the M8, M9 and the recent Fuji X100 sensor where they have the off-set micro-lenses. So other sensors can't possibly have absolute resolution figures that differ in the corners from the center.
Like Klaus said, PZ numbers are from a camera system and not just the lens alone. Leaving experiment errors aside, it's possible that one lens suits a sensor better than another. For example, one lens might be more tele-centric than the other.
However, how the PZ "border" and "extreme border" values are fairly meaningless in practice as I have explained below:
http://www.flickr.com/photos/genotypewriter/5207301499/
GTW