Some different white points at different ISO, Canon EOS 1Ds

[PeterWem]

I used dngmeta.rb for my 1Ds raw files and I got the following:

<Camera make="Canon" model="Canon EOS-1DS">
		<ID make="" model="">Canon EOS-1Ds</ID>
		<Sensor black="0" white="3617"/>
		<Sensor black="0" white="3500" iso_list="50"/>
		<Sensor black="0" white="3615" iso_list="100"/>
		<Sensor black="0" white="3614" iso_list="125"/>
		<Sensor black="0" white="3611" iso_list="160"/>
		<Sensor black="0" white="3616" iso_list="250 320"/>
		<Sensor black="0" white="3621" iso_list="500"/>
		<Sensor black="0" white="3625" iso_list="800"/>
		<Sensor black="0" white="3623" iso_list="1000"/>
		<Sensor black="0" white="3622" iso_list="1250"/>
	</Camera>

I also checked the color matrix. I got: $ exiv2 -pt 20220724E53W1894.dng 2>/dev/null | grep CalibrationIlluminant2 Exif.Image.CalibrationIlluminant2 Short 1 D65

and

$ exiv2 -pt 20220724E53W1895.dng 2>/dev/null | grep ColorMatrix2 Exif.Image.ColorMatrix2 SRational 9 3925/10000 4060/10000 -1739/10000 -8973/10000 16552/10000 2545/10000 -3287/10000 3945/10000 8243/10000