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View Full Version : Importance of Black Balance after powering down



Denwa
12-07-2009, 03:52 PM
I have noticed that you truly do need to black balance every time you power on the camera. I find noisier blacks every time I power back on (unless from standby mode).

Anyone else notice this?

If you close the iris and look at the waveform the thin line at the low end of the IRE scale looks noisey till you ABB.

Not saying this a "problem" it's good practice to follow anyway.

abeas
12-07-2009, 04:19 PM
What do you point at when you ABB? Should you shoot at anything particular? Obviously when I white balance I point at something white. Should I shoot something black when I ABB or do you set it in the enviornment you are in?

Mike Harvey
12-07-2009, 04:33 PM
What do you point at when you ABB? Should you shoot at anything particular? Obviously when I white balance I point at something white. Should I shoot something black when I ABB or do you set it in the environment you are in?

Neither. When you ABB, it will close the iris completely and black balance off of that, so it doesn't matter what you point the camera at.

ChipG
12-07-2009, 04:59 PM
I have an hvx and black balance every day I use it, not always everytime it's turned on but always the morning of the day I'll be shootng with it.

Cassius
12-07-2009, 05:47 PM
I've never specifically set the blacks on any camera, since I white balance at least once in each scene, and the camera automatically does it after. It's good practice to do that regularly anyway, in each direction.

Dafilman21
12-09-2009, 08:10 AM
I do not black balance every time I turn the camera back on if I am in the same lighting conditions. The manual says that you should only have to do it when you haven't used the camera for a while.

Denwa
12-09-2009, 11:39 AM
Close your iris. Turn on you WFM. Look at the line. ABB. Look at it again. Unless it's just my camera.

Barry_Green
12-09-2009, 11:47 AM
It's not just yours. On my 170 it made no difference, but there was a minor difference on my 40 and 150.

Black balancing takes literally two seconds, and it does help clean up noise in the blacks.

jeff9329
12-09-2009, 11:48 AM
Denwa:

It's not just you. That's a little scary seeing that.

handymus
12-10-2009, 01:24 AM
Good tip Denwa!

I will add that to my routine.

averan
12-10-2009, 12:25 PM
i give up.
where is this mysterious ABB button?
it's not even in the manual.

Denwa
12-10-2009, 12:27 PM
I've never specifically set the blacks on any camera, since I white balance at least once in each scene, and the camera automatically does it after. It's good practice to do that regularly anyway, in each direction.

The camera does NOT automatically do an ABB after an AWB. You have to do the ABB yourself.

averan
12-10-2009, 12:27 PM
how??

Denwa
12-10-2009, 12:28 PM
i give up.
where is this mysterious ABB button?
it's not even in the manual.

Hold down the AWB (white balance at the front) for a few seconds, you will see the iris close and ABB in the LCD.

averan
12-10-2009, 12:30 PM
pg 40.
press and hold the AWB button.
great, so i've been black balancing this whole time!
i thought i had to hold down the AWB button to WB, seems you just press it once.

Denwa
12-10-2009, 12:31 PM
pg 40.
press and hold the AWB button.
great, so i've been black balancing this whole time!
i thought i had to hold down the AWB button to WB, seems you just press it once.

newb! :Drogar-BigGrin(DBG)

Allen Ellis
12-10-2009, 01:14 PM
Yeah no worries, I made that same mistake for a while, too. Some other camera's I've used had to go to black before white balancing so I assumed it was part of the WB ritual.

Denwa
12-10-2009, 03:50 PM
I think a number of the shoulder mounts did that.

Desertfox
12-12-2009, 02:48 AM
So I was wondering... how often do you do an ABB? Everytime you turn on and off the camera as you move to different places?

Do you guys think it's absolutely compulsory to do ABB as much as AWB or just when the condition is dark?

Denwa
12-12-2009, 04:51 AM
ABB resets the computers brain to what Black is. It can be noisy otherwise. On this camera, from personnel experience, I would ABB every time you power on the camera. Panasonic also recommends ABB after changing record modes (1080 to 720 etc etc).