HPX-170 Auto White Balancing when I say no!

B

BrettR.

Active member
Hey, I turned off the ATW in the Auto SW menu, but it still wants to auto white balance making of shifts in color that are gross and annoying. Sometimes it isn't noticeable (or maybe not doing it) and others it's brutal. My bag isn't the best for my camera and frequently seems to bump buttons and switches... and every so often I'm in a rush and it might go in the bag powered on. could anything be hit on the outside that would cause it to over ride me turning ATW off in the menu?

Thanks.
 
The ATW setting in the AUTO SW menu only affects ATW when you put the AUTO/MANU switch to AUTO.

You may also have set ATW to one of the switch settings on the white balance switch, or you might have assigned it to a user button.

Or, your problem may not be auto white balance at all -- are you shooting under fluorescent lights, and using a high shutter speed? If so, that's a problem and you just can't do that, stick the shutter on 1/60th to avoid the problem.
 
My user buttons are assinged to deleted last clip and the other 2 are frame rate up and down.
My white balance switches say AWB Ach, AWB Bch and AWB P 5.6. AWB.. sounds like Auto White Balance! Is that it? It will let me manually white balance though and sometimes it seems to hold my setting... oh my. if this is the case, how do i disable that? I want the 5.6k option but the other 2 tabs should be for my manual white balance settings only.

I notice it alot under fluorescent lights but I noticed it really bad I was shooting at either 1/60 or at the most 144.0 degree angle at 30fps which is around 1/75 I think... and why does shooting higher effect color? Does this apply to shooting higher than 1/125 at 60fps too?

Thanks for the help!

P.S.- I know some of these answers might be in your hpx book but my copy is temporarily misplaced. It was in my car but I got in a wreck and I know I saw it afterwards... maybe someone at the Honda dealership is a fan of your work? haha.
 
Okay, you answered your question -- if you're shooting under fluorescents, only ever use 1/60th. ONLY. EVER.

Fluorescent (and other ballasted light sources) fluctuate in cycles in time with the power frequency. You need a full 1/60th to capture the full spectrum. If you use 1/75th, you're only capturing part of the cycle, and that's what's giving you the problem.
 
ok thank you! It's not strobish though, its a pretty slow transition. if I'm shooting 60fps for slow motion is there a higher shutter I can use or sharp slow motion under lights just not going to happen without this side effect?

Thanks!
 
You might be able to get away with exactly 1/120. But it's the lights that are the problem; if you use high-frequency electronic ballasts (like Kino Flo fluos) you won't see the color shift issue.
 
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