Ryan Earl wrote:
The corners darken in the 1.5 shot, so I'm going to say vignetting, if the cine version is anything like the ART stills lens it can be a little over 2 stops darker in the corners.
It's a good theory...however...
I mostly see it in the bottom right corner. Although it's at a different illumination level the bottom left corner doesn't appear to darken, certainly not around the yellow streak of highlight on the table nor does the top left corer which has a bright lamp in the very spot you'd expect a darkening vignette to show up. The level of the background blue does change a little here.
Lens vignetting tends to be a darkening in all corners equally...
Again, I'm not looking at the originals, just the GIF.
joe12south wrote:I think you are seeing the table go in and out of focus. That's the only thing I can think of since nothing moves and the lighting doesn't change.
I don't think so.
The lens in shot on the left hand side doesn't change brightness but does go in and out of focus.
The filament in the lamp top left doesn't change brightness either.
The yellow strip to camera left of it doesn't change brightness as it blurs either, or barely if it does and not the same degree it is on the table on the right hand side.
There's a TINY bit of blue spill on the table, likely not intentional in the very far left doens't seem to change much in brightness.
Another tell is the very left leading edge of the Spyder colour chart seems to have a brightness change on the side of it as well in the T1.5 version. BUT, not all the way down. Look at the strip next to the 1, 2, 3 labels on the left edge of the chart. It's changing brightness as the focus changes which would support your theory. But then why is it only the top part of this that changes brightness ?
And the change stops at the same hight that the lens is...perhaps because the lens is a shadow on the chart for the stopped down version ?
Finally when I look at the specular ball on top of the CUBE of the chart, I can see a difference in brightness fob with the tungsten light AND whatever the blue light is that's doing the back wash on the wall.
The thing is, they change in the opposite directions as the focus changes. The tungsten gets brighter as the t stop is lower but the blue light seems to get darker.
I also see a red light, which isn't in evidence in the scene, likely to be a power LED somewhere in the room.
Damn if the longer I stare at this the more obvious the colour difference in the grey is too. Very Green or pink....
JB