I'm Bitwize's ISF tech.
Here's some more detailed numbers. These measurements were made with the fixed iris at 2.
First for the ANSI checkerboard pattern contrast ratios.
With the lights on in the room:
before- 89:1, .168 fL black level
after- 109:1, .134 fL
With the lights out and the front of the TV covered with a blanket:
before- 109:1, .139 fL
after- 121:1, .12 fL
The advanced iris had little or no effect on the ANSI contrast because of the high picture level.
Now for the full on/full off measurements. These were made with a full field white pattern vs. a black pattern.
Room lights on, advanced iris low:
before- 506:1, .031 fL
after- 690:1, .023
Room lights off, w/blanket, adv iris low:
before- 8333:1, .002
after- 19000:1, .001
Room lights off, w/blanket, adv iris high:
before- did not measure
after- 32000:1, black level was too low to give a number (under .00), but this was confirmed with 2 readings
Room lights off, w/blanket, adv iris off:
before- 2479:1, .006
after- 3389:1, .004
All the black level numbers were rounded off by my program (Colorfacts), and all white levels were between 13.2 and 16 fL, depending mainly on advanced iris settings. Most white level readings were around 15 fL.
Subjectively, the blacks are richer, as expected, and shadow detail is improved.
Originally Posted by Bitwize
Great news! My ISF tech and I installed Velux inside his SXRD cabinet last night and the on/off contrast ratio (w/ lights off) measured nearly 4 times what it did without the Velux!
He had also previously strengthened his advanced iris in the service menu on both the high and low ends.
Contrast ratio measurements:
Without Velux: 8300:1
With Velux: 32,000:1
Here are the black level measurements:
Without Velux: 0.0031 fl
With Velux: 0.00013 fl
In other words, the Velux install is a terrific improvement. Took around 2 1/2 hours from start to finish.
We are going to install the Velux in my SXRD tonight. Will report back this weekend.