DVX100a Camera set up > 7.5%????

B

Bruce Morgan

Well-known member
I am still learning about file choices so
Can someone help me understand ...
When I select in menu " camera set up" and chose between 7.5 percent or the alternative does this referr to a ntsc type set up ?
Does the 7.5 % refence ire? or "laying down " black at a 7.5 percent ?
Thanks for a reply .
Bruce
 
Never use the 7.5% setup setting if you're recording in camera. 7.5 is basically only useful if you're using the camera as a live head and using the s-video output into an analog deck like BetaSP or something. If you're recording on the tape, or through firewire, you want that setting set to zero.
 
Barry_Green said:
Never use the 7.5% setup setting if you're recording in camera. 7.5 is basically only useful if you're using the camera as a live head and using the s-video output into an analog deck like BetaSP or something. If you're recording on the tape, or through firewire, you want that setting set to zero.
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:thumbsup: :thumbsup:
Thanks for the reply Barry!!
Just out of curiosity,, what happens if I record in 7.5 % ???
More noise ??
Or as we say in film more fog???
Thanks
Bruce
 
Barry_Green said:
Never use the 7.5% setup setting if you're recording in camera. 7.5 is basically only useful if you're using the camera as a live head and using the s-video output into an analog deck like BetaSP or something. If you're recording on the tape, or through firewire, you want that setting set to zero.
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Really? Why?
 
Bruce Morgan said:
Just out of curiosity,, what happens if I record in 7.5 % ???
Click to expand...
It artificially lifts the black level, washing out your contrast and wasting dynamic range, rendering a milquetoast picture with milky blacks.

7.5 is meant to only be added on the analog outputs, but that's not how the DVX (or any of these prosumer cameras, with the possible exception of the JVC) do it. In the prosumer cameras they add setup before recording -- which is the wrong way to do it. I'd go so far as to call it a "bug".
 
Barry_Green said:
It artificially lifts the black level, washing out your contrast and wasting dynamic range, rendering a milquetoast picture with milky blacks.

7.5 is meant to only be added on the analog outputs, but that's not how the DVX (or any of these prosumer cameras, with the possible exception of the JVC) do it. In the prosumer cameras they add setup before recording -- which is the wrong way to do it. I'd go so far as to call it a "bug".
Click to expand...
Thanks again
I assume this is very noticable ?
Glad I asked and sorry that Panasonic does not list pro and con in the set up description .
Thanks again Barry
Cheers
Bruce
:thumbsup: :thumbsup:
 
Barry_Green said:
It artificially lifts the black level, washing out your contrast and wasting dynamic range, rendering a milquetoast picture with milky blacks.

7.5 is meant to only be added on the analog outputs, but that's not how the DVX (or any of these prosumer cameras, with the possible exception of the JVC) do it. In the prosumer cameras they add setup before recording -- which is the wrong way to do it. I'd go so far as to call it a "bug".
Click to expand...
Hey Barry
Since you have seen this effect id like to ask one more detail .
Is adding 7.5 % something like adding +5 or ten in master pedistal ???
or far worse in terms of damging the quality of the image ???
Thanks for a reply .
Bruce
 
I just got the answer to my own question by going to the artical within this site on master pedestal .
It is differnt and looks like someone was using the old 'lightflex method from "Young Winston" back in the early 1970's .
And I see the loss to the black level .
One semi postive is that there is much more detail in the shadow area .
But this test and comparison and your comments Barry have convinced me .
Dont use 7.5 %!!!!!!!!!! it is a BUG its a FOG and Noise BUG !!!!!
 
Barry_Green said:
It artificially lifts the black level, washing out your contrast and wasting dynamic range, rendering a milquetoast picture with milky blacks.

7.5 is meant to only be added on the analog outputs, but that's not how the DVX (or any of these prosumer cameras, with the possible exception of the JVC) do it. In the prosumer cameras they add setup before recording -- which is the wrong way to do it. I'd go so far as to call it a "bug".
Click to expand...
So I assume that in order to be broadcast legal, you simply add some form of video legal filter to your final edit, thereby adjusting the black to what they should be? It's very odd that this "bug" is so misleading in the prosumer range! Especially from Panasonic.
 
If you're staying digital, there's no need to add setup. Setup is performed at the analog point, where you transcode your digital footage to analog. If you're finishing to DVD, you'd never add setup -- the DVD player itself will add setup to the analog outputs.
 
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