Just a check! I don't have a DSLR (I am an APUGER what do you expect?) so I take out my Nikon F5 which I hope would have a metering system similar to that of a Nikon DSLR. I set it to spot and use an 85mm lens on it. I compare the reading with my Konica Minolta Flashmeter VI in spot mode and the readings are within 1/3 stop from bright sun to indoor light levels. So sure I know that the F5 although much bigger and heavier would certainly works as a reasonable substitute for a hand held spot meter.