Originally Posted by chadwick537
I purchased a used X500 (4910) from a forum member about a year ago, the unit was calibrated by Chad B. prior to my purchase. I've verified the calibration is still accurate with my iD3 and ChromaPure.
When Chad B calibrated, he didn't do any standard gamma calibrations on high lamp, only low lamp. I'm now looking to use one of the high lamp modes with straight 2.4 gamma so I can use the UB820 tone mapping. If I use my Spyder 4 and JVC Auto Cal to calibrate 2.4 gamma on high lamp will it effect any of the other changes Chad B did? Each of the custom gamma slots has an imported HDR curve, but they are a little too dark for me.
(You may get better responses in the X500 forum as the Autocal software is not the same as the later models).
The Autocal software for the 4910 does not include any option to save/load the gamma curves, so you can only load custom curves using Arve's Tools. Hopefully Chad B provided the conf files that you can use to reload the custom curves, or you can see if the Arve Pr
command can be used to save the curves.
Caibrating at high lamp should not affect any previous calibration done at lamp power, but it would be prudent to check after running Autocal, and if necessary, restore from the backup file.
: Assuming the custom curves were set for High Lamp mode (not explicitly mentioned in your post, but stands to reason), running autocal will affect
the custom curves. Is there any reason why you think gamma 2.4 was not calibrated in High Lamp mode? For the custom curves to work properly the base gamma must be “flat”. He might not have set up any Picture Modes with gamma 2.4 and High Lamp, but that does not
mean the combination is uncalibrated.