Originally Posted by GregCh
OK thanks. I appreciate the info. This is the first JVC I have owned and I have not tried autocal and I have been a bit reluctant to mess with it. But your comments make it sound like it might be worthwhile. I will have to see if I see much difference between colors on high bulb and low bulb. I don't remember their being much difference. I mainly only use High bulb for HDR material and with auto tone mapping applied, so the comparison there is probably Apples to Oranges. I guess I need to see if there is a difference between low and high bulb on the same SDR setting.
Yes, you can easily toggle bulb modes in any mode to compare.
Also a trick to compare color calibration before/after on the NX. Run your calibration first with your iris wide open (position 0) and then after the calibration, move your iris down to -4. When you are toggling your iris between -3 and -4, you will actually see exactly what the calibration did to your image since the color calibration only applies to the iris in quarters of the iris range at a time. So -3 iris will be your calibrated result, and -4 iris will be your uncalibrated result.
Yes there is a tiny, tiny difference in brightness between -4 and -3, but just ignore that and focus on what it did to the color. Decide if you like the color more at -3 iris or at -4 iris and then you will know if you prefer the calibrated result or not. If you like the color at -3, then proceed to calibrate the other modes you will use (high/low lamp, BT.2020 filter on/off, and all 4 iris quarter ranges). If you like the color more at -4, then reload your INIT file that autocal spit out when it completed and you will be back to defaults.
To calibrate the rest of the iris ranges if you use them you need to then run the color calibration again with the iris at 0, -4, -8, and -12 to cover the whole range like if you use auto iris.
There are other great threads to help out with autocal if you have more questions.