Thank you for helpful thread.
I have purchased the X30 projector several months ago and have just recently installed it.
It took time to finish my HT room.
Using my DTP-94 colorimeter installed on the tripod I am trying now to do the proper calibration with My Carada 96' Briliant White fixed frame screen.
Following nightfly85's guide from the first post and kal's post from here
I have figured out something that worries me a bit.
In order to reach the desired 12-16 ftL readings the projector's iris should by closed to -15. It might be OK since the projector is installed in the light controlled room with black walls and ceiling in about 5 meters from the screen on the ceiling.
Running through the 10 IRE's patterns using the AVS 709 disc with PS3 I have realized that my out of the box calibration is very poor. The gamma drops from 2.0 to 1.7. The color temperature is about 6K.
In order to correct this I have started with 7K color temperature which according to the readings gives me 6500 and changed the gamma to custom with the 2.4 correction which drops now from 2.2 to 1.9.
Then I have started with the custom gamma white point correction 20IRE to 90IRE making it look flat at 2.2.
After that I have checked the 80IRE readings in order to correct the RGB GAINS (HighEnd) and stuck. There is too much green gain according to the colorimeter readings R91 / G103 / B87
I have to say that DTP-94 is my third colorimeter and I have used it to profile my displays for a photography work for a long time now and never had a reading problems. My first one was Spyder 2 and was too slow for me. The second was Eye-One Display LT and had a very significant color shift defect. So I assume that the colorimeter gives me correct data.
It is suggested not to touch the green gain since it changes the overall contrast. But I can not change the Blu/Red gains since they are at "0" mark on the projector and it allows me only to reduce the gain.
I have reduced the green gain because I have found no other solution. The green gain was so huge, that in order to make the RGB equal I had to reduce it to -45.
Then I have made the 30IRE readings and reduced a bit the RED and the BLUE offset. Reducing the GREEN gain a bit more with 80IRE I have achieved the desired 80/30 D65 point (very close to x=0.313 and y=0.329).
The the greys were remeasured and additional custom gamma corrections were applied for the Blue point to match the RGB levels.
Color was measured as well and slightly corrected.
Those are my before and after results:
G R : 0
G G : -48
G B: 0
O R: -11
O G: 0
O B: -16
Custom Gamma Correction 2.4
Color Space Standard
Lens Aperture -12
Lens Power Normal
HDMI Enhanced ( Full - Matched )
Color Space: RGB
Black Level: 0
The resulted picture is not vivid enough for my opinion. Though the dark scenes look better than the bright ones.
On the bright scenes I feel that I have not enough light. For example - the LOFTR sunny landscapes does not look like a sunny day, but more like an autumn.
However, I am not exactly happy with the results and would like to improve it with your help.
1. Is it normal I should reduce the green gain so much ?
Is there any other way correcting the RGB gains in my case ?
Is it the equipment ( projector/screen ) problem ?
2. Is it normal that the gamma and the color readings are so poor out of the box ?
3. Though I was precise in order to maximize the light reading positioning the colorimeter prior the readings, might it be the reading issue ?
Any additional suggestions are much appreciated.I am sorry for my English grammar.