Exposure consistancy across multiple bodies.

[Neeneko]

Ok, a little background.

I currently have two camera bodies and will soon have a third. All three are Canon (300D,350D,550D, so crop bodies) but two of them have had hardware modifications done to them.

I have been playing with the idea of doing some comparison shots to show how the mods effect how much light the sensor gets, but then I realized I was not sure if exposure was consistent across different models.

So that is my basic question to everyone. If I plug the same manual settings in the with identical lens/lighting into multiple models of crop bodies, if they were stock bodies, could I expect identically exposed results? Or does the behavior of the sensor render the manual settings meaningless on any body other then the one you are metering them for?

 

[kennephoto]

Good question and I doubt I have an answer I just took some photos outside with 7d and 40d with same lens on the same tripod with same settings and the 7ds came out a tad brighter. Hard to say if it was slight difference in ambient light from the sun or the camera but I cant imagine it would be too different but Id say try it and see.

 

[Neeneko]

Good question and I doubt I have an answer I just took some photos outside with 7d and 40d with same lens on the same tripod with same settings and the 7ds came out a tad brighter. Hard to say if it was slight difference in ambient light from the sun or the camera but I cant imagine it would be too different but Id say try it and see.

That is a good sign. I expect some small differences, but if it isn't on the order of 1 stop or greater (which is what I am expecting to see) then it shouldn't effect the comparison much.

 

[Mt Spokane Photography]

You will see some difference, but it should be less than 1/3 stop. Canon can adjust and match your bodies if its critical.

 

[Neeneko]

You will see some difference, but it should be less than 1/3 stop. Canon can adjust and match your bodies if its critical.

Excellent, that is a range that should be fine.
Interesting that Canon can adjust to match them, though for this case I doubt it would be worth it.. esp since, as I said, they are modified bodies, so I suspect Canon would not touch them anyway ^_^