Einstein 640 vs Profoto D1 {Shot with PhaseOne IQ 140}

[Ben Rubinstein]

We're using D1's in a repro studio where even a 100k shift is noticeable and a problem and sorry folks but the D1 isn't quite as good as you're saying it is. A half stop difference on the dial will produce a shift. Small but there.

[Cineski]

What about the Profoto B600r?  How much shift is going on with these?  Have shot with them but have done nothing scientific.

[K.C.]

We're using D1's in a repro studio where even a 100k shift is noticeable and a problem and sorry folks but the D1 isn't quite as good as you're saying it is. A half stop difference on the dial will produce a shift. Small but there.

Do you think there's any light available that doesn't shift ?

I've shot with the everything, including Broncolor and a 50K-100K shift is as good as it gets in my experience. Metering my D1s with the Minolta color meter I have to make a change of over 2 stops before mine shift. If I profile the camera for the specific shot and import the profile into LR it's not an issue.