Marker

Norm Sanders

Norm Sanders

Script Wrangler
Did a search & couldn't find this topic. When my marker shows up on the LCD screen (DVX 100a), I notice that the smaller square box within the marker is not centered, but actually off to the lower left of the marker. From what I read in the manual, this is the area that the camera is actually white balancing to, etc. (at least I think that's what I read).

Anyway, is there some way I can force it to center in the middle of the marker, is anyone else's like this?
 
All 100a's have the smaller box offset like that. It is not the area that's being white-balanced, rather it represents the actual area that's being sampled for brightness. Whatever's in that box is what gets numerically represented in the lower left of the screen (i.e., 48%, 99%, etc).

No, there's no way to "center" the box.
 
Thanks Barry. When white balancing, or auto focusing, anything within the outer marker is what effects both of those then, right?

In other words, if I'm white balancing, I simply need to make sure all white is within the outer marker, and the whole screen/lens doesn't have to be filled with white.

- AND -

When auto focusing, the camera is focusing on what's inside of the outer marker.

At least that seems to be my experience so far. So the inner marker (small offset box) is more for IRIS control, since you're saying it's sampling brightness?
 
I don't know that the boundaries of the box have any effect on what's being sampled for white balance or autofocus... I do know that autofocus uses the central part of the image as the most-important thing to focus on, but I don't know that it's related to the size of that white box.

For white balance, you can usually draw a halfway decent white balance even if you just point the camera at a wide shot. It's not like you absolutely have to fill the entire screen with nothing but white. However, the more white you give the camera, the better it can do its job. I haven't bothered to test whether the "marker" frame is related to the white balance process.

What you say could be true, but I don't know, I haven't experimented with those parameters.
 
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