- Written by Chris Eberle
- Published on 25 January 2012
The Screen Innovations Black Diamond Zero Edge Projection Screen On the Bench
In measuring the Zero Edge Black Diamond I wanted to know two things – how close does it come to color neutrality and does it achieve the advertised gain. To do this, I simply measured color and grayscale from my Anthem LTX-500 and compared those numbers to the reference numbers generated by my Carada screen.
First up are the color measurements. I used my usual setup of an EyeOne Pro spectrophotometer taking reflective readings from 10 feet back. You can see the CIE and luminance charts are nearly identical. Only cyan and white dip slightly towards blue. This is similar to the last Black Diamond screen I reviewed in 2009 which was also biased toward blue but to a greater degree. Luminance is also slightly affected but not visibly so.
The grayscale charts tell the rest of the story. You can see that blue and red ride a few percent above green in the tracking graph. The Delta E numbers are high enough that the error was visible but in my viewing I didn’t find the slightly cooler color temps to be a big deal. The gamma also affected with a slightly brighter average value. Again, this will be barely visible. Still, any time you change a screen, you should re-calibrate. I would do this no matter what.
As far a screen gain, the peak white measurement of 18.03 foot-Lamberts is within a whisker of the same measurement off the Carada screen which is also rated at 1.4. This tells me that the Black Diamond 1.4 gain material has an actual gain of 1.4. Contrast performance however, is clearly superior to the white screen material used by Carada. The minimum black level was not measurable by my instruments but I could plainly see a zero-percent signal was darker on the SI screen than on the Carada.