The difference is minuscule


Here's my two sense based on my understanding of sensors:


I really think if there is a difference these two cameras, it's very minimal.


When a camera like the VG20 utilizes a single CMOS sensor, I believe that CMOS sensor records incoming light with a bayer pattern, where the pixles are arranged as follows:







A pixel is sensitive to only one primary color and the other two values that it should be picking up are interpolated based on the surrounding pixels. For example, if a pixel is sensitive to green light, the red and blue light that it should be recorded is only interpolated (aka: guessed) based upon adjacent pixels that are sensitive to red and blue.


When you have 3 sensors, that allows all primary colors to be recorded for every pixel.


What makes your question tricky is sensor size. The VG20's sensor is much larger than the TM900's 1/4" sensors. So while VG20 is doing much more interpolation, the size of the sensor may mean it has just as many red-, green-, and blue-sensitive pixels as TM900. Does that make sense?


If you were comparing two cameras that used sensors of the same size, but one was 3-Chip and the other was only single chip, the 3-chip would win, hands down.


Furthermore, both cameras utilize AVCHD/H.264/MPEG-4 compression, which utilizes 4:2:0 chroma sampling. If you don't know what that means, it means the cameras are throwing away a lot of color information in order to provide smaller file sizes. 


So at the end of the day, if there is a difference between the two cameras, I think it will be minimal. But I think you'll be fine for the color correction. I think you'll only start to see problems if you attempt any aggressive corrections. Make sure you give your camera enough light and you will be fine.


Hope that helps…


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