Originally Posted by *Harry*
You could get more light for the probe by setting your PJ's zoom at minimum. The spyder cal SW is not needed - just the drivers.
Just a trick to check, if the grayscale gets calibrated by the JVC SW:
Hold any colour filter or somewhat else before the probe while the R|G|B ramp measurement is running.
If it "calibrates" , then the "after" gamma curve should look very deformed.
Thanks for this.
Yes I know the software isn't needed, in fact you have to make sure you disable the small profiling utility that installs and loads automatically (I assume to calibrate your monitor) because it creates some instability with the JVC software, as it access the probe at the same time.
I was just reporting the low light ability of the Spyder 4 for others. I have no need for it, I use a Discus profiled to an i1pro2 for all my measurements off the screen.
The JVC software definitely corrects the greyscale. I check all the results with Calman Ultimate. It also does something to the gamma curve, especially at 5% white where it calculates a gamma which is way too high, which creates significant black crush. It just doesn't correct the rest of the curve, or not significantly compared to what's needed given the amount of gamma droop I have (see the screenshots).
I am careful of making sure that the first gamma point doesn't read zero, and I tried all three gamma modes (fast, normal and quality) as I thought maybe the Spyder was struggling to read 5% even when facing the screen, but every single gamma curve corrected by the JVC software had this black crush at 5% white.
I've done more test with the color profiles, and it also corrects them, but not much as far as the standard presets are concerned.
On another hand, I imported a rec-709 preset in custom1 using the profile generator, and that preset is calibrated to perfection, with excellent linearity. Max dE under 3, average dE of 0.9 in the colorchecker SG, and that's before running a LUT!
So just for that, the investment has paid off. I have an almost perfect profile for all my sources without MadVR. Great!
The greyscale is also spot on at 6500K, I need very little correction to adjust WB at 100% and get perfect greyscale over the whole curve.
If only it could correct the gamma droop, it would be great.
I can't believe that no X500 owner has tried this software and can confirm if it works or not for gamma.
I've ordered a Spyder 4 Elite which I should receive tomorrow, I'll decide between the two which one I send back. I don't mind which one is more accurate, but I want the one that give the best results pre-LUT from a saturation and luminance point of view. Once I've decided, I'll run all the measurements for my HDTV profile, with CMD on/off, various iris positions (I prefer to use 0, 5, 10, 15, it's easier to remember!) and low/high lamp.
I also created a very wide gamut using the DCI colorspace and a D65 white point. That create a great native gamut for a cube LUT, with all the colors oversaturated and all luminance above target as well. The advantage over profile off being that you can select any color temp and that you can also enable clear black.
A couple more remarks:
- when you calibrate a custom color profile, color temp and gamma are not calculated
- restoring the factory (or any other backup) takes a very long time!
Thanks again for all the information you reported earlier in the thread, that was very useful.
I just hope that someone with an X500 will try and report if gamma works for them or not.
Question: did you try to use the import profile for custom gamma? Do you know how it works? I might try to program a BT 1886 profile if I understand how to use it, who knows, that might work!