The curves filter can do the same thing as the levels filter, but the interface would take too long. (*Ignoring the rounding error in the levels filter... i.e. the levels filter doesn't round numbers like it should.)

To drop a stop, use the following settings in the levels filter:

Output start = 0.023
Output end = 0.759

This is assuming studioRGB color space.
*Asinine details: The figures assumes Rec. 601 (not Rec. 709 / most HD formats), and it assumes that the levels filter rounds correctly (which it doesn't).

2- Ask for the Excel spreadsheet used to generate these numbers.

3- The simple answer would be to eyeball it... although this is not entirely accurate, because in Vegas you have to juggle the settings (start and end)... because the filter assumes computer RGB, even though many other parts of Vegas assume studio RGB.

Thnx for that answer Glenn, i had an inking you'd know that one ;)

If u have an excel formula set up with this, that would be great :) myu email is djpadre@hotmail.com

yeah for now were looking at 601, but 701 soon to follow, then again, another review once i get DVCproHD into vegas... mor ethan likely this too woudl need to be reviewed..

then again, the solution to all this is to hire someone who knows how set proper exposure on a DVX100.. lol

Here is the Excel spreadsheet.

http://glennchan.info/Proofs/forums/sony/vegas%20levels.xls

The math for Rec. 709 is different and slightly more complicated.

2- I don't think the DVX100 follows Rec. 601 exactly, but that depends on what gamma mode you're using.
The DVX100 may have some sort of video knee in its normal mode. Its cinelike-D mode may not have a knee, but it may have a constant multiplying the transfer function.

What this means is that my figures will be off. You can calculate stops in reference to the monitor... which roughly have a gamma of 2.4
The mismatch is intentional. The actual transfer function closely follows
f(x) = (x + black level error) ^ 2.4
**There are conflicting articles over the whole monitor gamma thing.

3- The simple answer is just to do what looks right... that is how video engineers came up with the mistmatch between camera gamma and monitor gamma. The mismatch looked right.
Of course you will need a reference monitor.

thx for taht Glenn,
the camera itself allows one to manipulate the knee setting based on ur needs, i dont know if its locked off on Cine D, but i do know its twaeakble with CineV (which is what i usually use)

Accuracy isnt a life or death thing right now, but being able to drop the exposure without introducing noise is. Ive Got a couple of half stop settings laid out as, but ive found if u push the pre prior to the output, you start introducing a level of saturation which is quite unpleasant.