Some different black points at different ISO, Canon EOS D60

[PeterWem]

<Camera make="Canon" model="Canon EOS D60">
		<ID make="" model="">Canon EOS D60</ID>
		<Sensor black="132" white="4000"/>
		<Sensor black="137" white="4000" iso_list="800"/>
	</Camera>

exiv2 -pt CRW_7102.dng 2>/dev/null | grep ColorMatrix2
Exif.Image.ColorMatrix2                      SRational   9  6211/10000 -1358/10000 -896/10000 -8557/10000 15766/10000 3012/10000 -3001/10000 3507/10000 8567/10000