Originally Posted by bdht
Have you seen a native gamut graph of those models? I was never able to find one, I think I remembered reading that the dci models had a 120% ntsc gamut. I see the vizsim is rgbcym and the dci is rgbrgbg.
Just dawned on me that the realcolor factory measured figures are probably the native gamut. Measured figures provide the baseline which the projector uses processing to alter to achieve the desired coordinates. That baseline is measured at computer native. A user calibration uses the same method with the user taking measurements from their screen. The original factory measurements are saved in the service menu so the user projector calibration can be reset back to factory default.
As I buy second hand the caveat is that if a previous owner had access to the service menu they may have been changed.
luminance for colors uses white luminance as 1 so figure is color luminance on its on in comparison to white.
My F30 WUXGA VizSim while the projector label just states VizSim appears to be what would latter be called a VizSim bright color wheel a different version of VizSim colorwheel to my F30 1080 VizSim
Red x 0.638 y 0.352 luminance 0.192
Green x 0.337 y 0.627 luminance 0.519
Blue x 0.139 y 0.064 luminance 0.071
Brilliant Color 1 x 0.434 y 0.536 luminance 0.411
Brilliant Color 2 x 0.150 y 0.185 luminance 0.099
White x 0.310 y 0.318 luminance 1.000
My F30 1080 VizSim appears to be a standard VizSim colorwheel, as far as factory measured luminance goes it appears to be the ratio between the color primaries lumanance figures that matters.
Red x 0.643 y 0.344 luminance 0.133
Green x 0.317 y 0.635 luminance 0.336
Blue x 0.140 y 0.080 luminance 0.061
Brilliant Color 1 x 0.145 y 0.066 luminance 0.049
Brilliant Color 2 x 0.336 y 0.350 luminance 0.000
White x 0.305 y 0.324 luminance 1.000
So the native colorspace of my F30 1080 VizSim
covers 100% of SMPTE-C, and is about 113% the size of SMPTE-C colorspace.
covers about 95% of Rec.709 and is about 105% the size of Rec.709 colorspace
Originally Posted by bdht
pd/barco/dpi projectors as theyre typically fairly honest about gamut coverage unlike with light output. 4000 ansi lumens is probably 2000 calibrated lumens? with 2 lamps at full power pulling 1kw of electricity and pumping out 3000btu of heat. These projectors were marketed for simulation and professional environments as you would need a dedicated circuit and exhaust.
My F30 1080 VizSim according to my cheap light meter with about 250 hours on each lamp, at native gamut with brilliant color on is 4208 lumen that is more than the 4100 lumen spec. While set to Rec.709 primaries and D65 with brilliant color on it is 3482 lumen. I would take the figures with a pinch of salt as it is a cheap light meter, but the % drop should be about right. So at Rec.709 D65 it is 82.7% of its native lumens.
Is there a need for a dedicated circuit in the USA?
There is no need in the UK where I live.
Projector 1,050 Watts
UK household power socket 240 volts x 13 amp (there are fuses in plugs) = 3,120 Watts.
UK ring main 240 volts x 30 or 32 amp fuse in the fuse box = 7,200 or 7,680 Watts. Typically one ring main for all the sockets on a floor, dedicated ring mains for things like a electric cookers or boilers, and separate lower amp ring mains for the lighting.
As far as heat goes I could use it as a room heater in winter, and need windows open in the summer, and on hot days it is unusable, in the UK air conditioning in homes is uncommon. It is designed to fit an optional exhaust kit that pipes the hot air out of the room but I have not bothered obtaining or DIYing one.