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Home: Video University Forums: Teaching Video Production:
Ikegami, four optical filters, please help :)

 

 


Dawner
New User

Oct 15, 2005, 11:21 AM

Post #1 of 3 (1891 views)
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Ikegami, four optical filters, please help :) Can't Post

Hello

I am complete newby in this waters, so new i even hardly understand some basic. I saw a Ikegami DVCAM has four optical filters 3200K, 5600K, 5600K+1/8ND,5600K+1/32ND. 1,2,3,4

What this means? Ok i know this are celvins but how do you know how to use them? Ok i understand there exist some scales, but i am not able to understand it. What does 1/8ND means or +1/32ND? I was changing the filters outside(also the places where shadow is), in a room etc. But sometimes picture was too blue or two yellow. I just can't study the system.

And i would also like to ask how to use auto white balance(awb). In this case, do you must zoom the camera to see only the white object or there can be some some other colored objects in the cadre?

And what to do if you make awb and camera says something like 9000 K+? Wich filter to use in this case, considering there exist only four filters none big enough for this color temprature. Please help me.


videobear
Veteran


Oct 16, 2005, 12:39 AM

Post #2 of 3 (1880 views)
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Re: [Dawner] Ikegami, four optical filters, please help :) [In reply to] Can't Post

Use the 3200K filter for shooting indoors under incandescent or fluorescent lights.
Use the 5600K filter for shooting outdoors, or with daylight-balanced lights like HMI.
Use the 1/8 ND filter under sunny conditions, when you can't get proper exposure even with the lens stopped down fully (high f number).
Use the 1/32 ND filter if it's so sunny that the 1/8 won't do the job.

Auto white balance doesn't require pointing at a white object at all. But I recommend you use manual white balance.
1. Set the proper filter wheel.
2. Set a roughly correct exposure
3. Zooom in on a white object. It should fill at least about 70% of the frame.
4. Press and hold the WB button until the camera indicates it has a white balance.
5. Repeat whenever the lighting conditions change significantly.

You can generally store two WB settings in camera settings memories. Useful if you're moving from inside to outside and back a lot.




Regards,
Doug Graham
Panda Productions


backfocus
User


Oct 23, 2005, 6:01 PM

Post #3 of 3 (1770 views)
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