Originally Posted by Kris Deering
We did it both ways as I mentioned above and the CR did increase. This is what I would recommend for the end user as well. I personally would probably use the Standard laser mode with the iris clamped down to my desired fL. The high mode was still a bit too noisy for my tastes.
Here are my sequential CR measurements done this morning. My meter is close to the lens, but not covered in velvet like Darin did. I'm sure my contrast would be higher if I had, but nevertheless these show the results in a typical room.
In dynamic mode, high power, lens iris open, sequential contrast measured 22,504
In dynamic mode, high power, lens iris closed (-11), sequential contrast measured 32,078
In my normal viewing mode (calibrated natural mode with high power and lens iris closed to -9), sequential contrast measured 20,335
In all cases dynamic contrast was off, super res/4k enhancements were off. My throw is 17 ft, roughly in the middle of its range for my 128" diag 1.78 screen.
cine4home got a range of 25K to 40K depending on zoom and lens iris settings, so I think my results are about right.
My screenshots from ChromaPure are shown below in the same order.