Customizing the A1: What are these tunables? at DVinfo.net

Erik Norgaard · September 14th, 2007, 02:23 PM

Hi:

I have searched around to figure out what the different custom tunables mean and do. I tried to shoot a test changing each to it's extreme individually, but some appeared to have no effect on my test object. The manual doesn't give a clear idea either, nor does Canon's "XLH1 Total Image Control".

I understand Gamma, Master Pedestal and Setup level, and it appears that Knee and Black works on bright and dark end contrast. Now:

Sharpness: By the name it is obvious, but how does it work?

Horizontal Detail Frequency/Horizontal-Vertical Detail Balance: What is this? When will I need it? No clue on this at all.

NR1/NR2: Judging from the description, why would I use NR1 over NR2? It appears to have same effect but NR2 does not leave an after image.

Color Matrix: What does this toggle? I mean how does it work? They show a nice curve for Gamma in the manual but nothing for this.

RG/GR Matrix etc: Well, along with gain for each channel, this I guess defines all the entries in a 3x3 matrix. I would then guess that the input color vector is multiplied by this matrix to get the output color vector. Is this right?

Thanks, Erik

September 14th, 2007, 02:23 PM	#1
Erik Norgaard Major Player Join Date: Mar 2007 Location: Madrid, Spain Posts: 238	Customizing the A1: What are these tunables? Hi: I have searched around to figure out what the different custom tunables mean and do. I tried to shoot a test changing each to it's extreme individually, but some appeared to have no effect on my test object. The manual doesn't give a clear idea either, nor does Canon's "XLH1 Total Image Control". I understand Gamma, Master Pedestal and Setup level, and it appears that Knee and Black works on bright and dark end contrast. Now: Sharpness: By the name it is obvious, but how does it work? Horizontal Detail Frequency/Horizontal-Vertical Detail Balance: What is this? When will I need it? No clue on this at all. NR1/NR2: Judging from the description, why would I use NR1 over NR2? It appears to have same effect but NR2 does not leave an after image. Color Matrix: What does this toggle? I mean how does it work? They show a nice curve for Gamma in the manual but nothing for this. RG/GR Matrix etc: Well, along with gain for each channel, this I guess defines all the entries in a 3x3 matrix. I would then guess that the input color vector is multiplied by this matrix to get the output color vector. Is this right? Thanks, Erik