Same everything - different picture...

[daveozzz]

OK here's one for you.

While I was trying to determine which of my 2 Bessa R bodies has a rangefinder misalignment (answer: both - yay!) I conducted a little experiment.
Got the first bessa with my nokton 50/1.5 on it, stuck it on a tripod, focused on a strategically placed beer can and shot the picture with wide open aperture.

I then unloaded the film and reloaded it into my other bessa, advanced to a few frames after the first test shot with the lens cap on and repeated the test with the same film, same lens, same aperture, same shutter speed, same tripod position and same strategic beer can. Only thing different is the body.

I got the film processed and scanned the 2 frames.

What is puzzling my is that the pictures have different colours... One has definitely got a slightly different hue to the other. Both appear exposed correctly.

My question.. how might that have happened?

 

[Trius]

Dave: What film were you using? If it's colour neg, then it could be the scan. I wouldn't think so, but stranger things have happened. If it's chrome, then you can tell the colour balance from the slides themselves. It does sound strange.

Trius

 

[Todd.Hanz]

"follow the light", my guess would be the light changed a bit or the processing machine adjusted itself between shots.


Todd

 

[daveozzz]

It was 400uc negative... I guess it could be the scanning - but exactly the same settings were used for both. I used NikonScan.
I was suspecting that one of the bodies had the shutter speed slightly off resulting in a slightly different exposure which was altering the saturation... Not sure if this would manifest itself like this of not.

No biggie really since unless I saw them side by side I probably wouldn't have thought anything of it.
Intrigued tho!

 

[eric]

"follow the light", my guess would be the light changed a bit or the processing machine adjusted itself between shots.


Todd

That's my guess too. Our eyes may not perceive the change in light or it got used to it. Try testing with strobes next time. At least, you'll be getting similar light. Also, tape the crap out of the tripod if it is on the floor, you'll never knwo if anything went awry no matter how careful you are. I used to have to shoot the same exact table top shot the next day and I used to have to take measurements of the tripod, lens, as much measurements I can take so if I have to do it again, everything will be in the same spot.

 

[daveozzz]

I guess it could have been the light - but it was a blue sky day in Spain - shots 2 minutes apart... but maybe I was blocking some sort of reflection in one of them. Shows how there's infinite variables even when you think you're being v scientific..