[thxbb12]

Dxomark.com just reviewed the new Sigma 35mm f/1.4 and it easily sets a new record among other lenses in this class:

http://www.dxomark.com/index.php/Publica...omparisons

 

Very, very impressive indeed. Given how little it sells for compared to both the Nikkor and the Zeiss, the Sigma is definitely a bargain and by very very far the best value of the bunch!

 

[Steinar1]

I agree with you! It looks like not only the best value, but simply the best lens available.

[vodanh1982]

Could someone explain why the sharpness graph of Sigma on D7000 is more yellowish than on D800? Both cameras has the same pixel density so I suppose the D7000 is like D800 center cropped which should be sharper.

 

http://www.dxomark.com/index.php/Lenses/...M-A-Nikon/(camera)/680/(cameraname)/Nikon-D7000

http://www.dxomark.com/index.php/Lenses/...M-A-Nikon/(camera)//(cameraname)/Nikon-D800

 

Thanks.

[Klaus]

Could someone explain why the sharpness graph of Sigma on D7000 is more yellowish than on D800? Both cameras has the same pixel density so I suppose the D7000 is like D800 center cropped which should be sharper.

 

http://www.dxomark.com/index.php/Lenses/...M-A-Nikon/(camera)/680/(cameraname)/Nikon-D7000

http://www.dxomark.com/index.php/Lenses/...M-A-Nikon/(camera)//(cameraname)/Nikon-D800

 

Thanks.

 

Actually, this matches with our findings. There is a bit of a local drop at the APS-C borders.

[vodanh1982]

Actually, this matches with our findings. There is a bit of a local drop at the APS-C borders.

Is it because of different AA filter? The crop of D800 is sharper than the D7000 but they should be the same.

[Klaus]

Is it because of different AA filter? The crop of D800 is sharper than the D7000 but they should be the same.

 

Well, we tested this on the D3x and D7000. The D7000 has a higher pixel density than the D3x.

 

We were also surprised about this but the the center to corner resolution is not necessarily a continuously decreasing curve. We tested a couple of lenses where the extreme corners recovered again just to point to an obvious finding.

 

It can also have something to do with the sensor design. e.g Sony's 16mp APS-C sensor is supposed to have less corner smearing compared to the 24mp APS-C variant - probably due to the different micro-lenses in front of the photo-diodes and the characteristic of the photo-diodes themselves (their distance to the surface of the sensor).