I was testing the Sigma 150-600mm contemporary today with different cameras.
Exposure with the D7200 and D750 is spot on.
With the D3200 though the lens is overexposing by 1.33 stops.
This was consistent with different metering modes on the D3200 and was the case with 2 different copies of the 150-600.
On the same camera the Tamron 150-600 and all of my other lenses meter correctly.
Before I contact Sigma on Monday I was wondering if anyone else has the same camera/lens and they experience the same issue.
Also if people can test the lens with other, older, cameras it would be great.
I will see if I can find another D3200 to repeat the test.
If it is a compatibility issue thank God for the ability to update the firmware using the USB dock