Following on from thread in DSLR by Greg/Perth43 Histograms and being unhappy with GUI's reply, I started looking for some landscapes where I had taken a number of exposures and also came across one where I had not changed speed or aperture, but had changed lens.
One where I had arguably/technically under-exposed 1/3EV came out very different (and worse) just adding .3EV in NEF/RAW exposure compensation.
More interesting was this one where I was probably trying to avoid a lens change from the 80-400 usually on when travelling, but realised I was going to have to. Shown with histograms in NX2.
No1: with the 80-400 at 86mm f11 1/320
No2: with 18-135 at 50mm f11 1/320
In order to get the colour temp correct at 5300± 'as shot' on no 2, on no 1 I have to change it from the 4700 registered to 5600.
No 3 is the normally edited version of no 2. On histogram only it could be judged underexposed .3 to .5EV, BUT upping it washes out the rest in a way that tightening the tone curve does not as it is not using the full sensor bandwidth or whatever you call it anyway.
Can someone tell me if it is normal for a lens change to have such a dramatic effect on colour temp? I don't think it always happens in fact I usually have to get the data up to see which lens I did use where it could have been either.