Originally Posted by hifiaudio2
I also did a few 3d observations and what I found surprised me. These tests were done with just my CA813 light meter in fc mode at the screen facing the projector. The screen is 133" diag 16:9 and the projector is at about a 23.5 ft throw. The projector was in my normal watching settings, which is reference, "normal" aspect, d65, rec709, gamma 2.4, film mode ON (decreases FC by about 5), contrast at 88 or 89, and auto IRIS limited (i think).
In 2d, with a 100 IRE field: 19FC
WIth 2d-3d mode engaged on Sony with NO glasses.... 8.9 FC
When placing the Sony glasses in front of the meter.... 1.5 FC
So maybe I had a misunderstanding of 3d modes, but I thought most 3d modes went UP in lumen output when engaged, and then back down of course with the glasses on. On this projector, simply engaging 3d mode kills half the brightness, bringing it in line with most of its cheaper competition.
Hi, can you change the CA813 to the LUX setting instead? Your screen is 4.86 Sq Meters, so to calculate lumens, just multiply the LUX read x 4.86.
If we convert FC to LUX (please verify this with the meter)
19FC = 204.5 LUX x 4.86 Sq Meters = 993 lumens
8.9FC = 95.8 LUX x 4.86 Sq meters = 465 Lumens
1.5FC = 16 LUX x 4.86 Sq Meters = 77 lumens (through the glasses)
The author of the HT review stated that his results were the same with 2D-3D vs. a true 3D signal.
your throw is quite a distance which would explain the 2D #'s. My projectors are closer to my 142" HP, ~ 17 Feet. I'll have to check it out when Mark visits with his VW1000.
Is there a specific 3D setting that increases the light output? it does seem odd that it would be 1/2 in the 3D mode. Some of the models i've tested all keep at least the same light output in 3D mode, or higher like the Epson 5010.
Thanks for posting the info.