Instruction manual

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KONA 3 Installation and Operation Manual — Using The KONA 3 Control
YUV-RGB Conversion: These pulldowns select industry standard color space and
gamma transfer functions for the YUV-RGB conversion, or allow you to direct
the KONA card to automatically determine it for you.
Colorspace—choose from:
Rec 601
Rec 709
Auto
Gamma—choose from the following:
Linear (1.8)
Rec 601 (2.20)
Rec 709 (2.22)
Auto
Enable Custom LUTs—this checkbox enables a custom color lookup table
(LUT) for use in Final Cut Pro. When checked, there will be a new “Custom
LUT” menu item under the Windows menu in the KONA Control Panel.
Selecting that item brings up the “Custom LUTs” dialog shown on the following
page. Defining a LUT applies it to the KONA 3 output. The custom LUT will be
saved with the Final Cut Pro presets. 1D LUTs are supported for import, but not
3D LUTs.
The KONA 3 has an additional window in the Kona Control Panel for Custom
LUTs. In this window there is a pulldown where users see choices like Linear,
User Linear, etc. In this list is “Load File...” AJA can only support 1D LUTs, not
3D LUTs—and 1D LUTs should be considered appropriate for viewing purposes
and tape mastering to video, but not for hyper-critical color correction where the
goal is to go back to film. In these cases a hardware or software application that
can use 3D LUTs would be more appropriate. 1D LUTs can be created or
obtained from a number of companies including Kodak and Thomson Grass
Valley, to name a few. Often a 1D LUT can be derived from a 3D LUT, so you
still will have an accurate reference for viewing and video mastering.
LUTs have two major parameters to remember: they are for turning material from
its raw form to a viewable representational form, and they should also be
calibrated for the device being displayed upon: LCD, CRT or projector.
The AJA Custom LUT supports the loading of a tabbed text file which could be
created in either an application like TextEdit or Microsoft's Excel. The document
would consist of 3 columns representing 1024 values for each of the R, G and B
columns.
Note: Custom LUTs only work with RGB material.