I saw the Sony SRXT420 at Dome Day in the Cincinnati museum. With the "8 K" lens it is brighter than their IMAX projector. Two of these can cover the dome and be brighter than IMAX.
This is significant. Typical IMAX projectors also vary in the evenness of the light distribution by a factor of 2. The T420 was very even all the way around. I measured with a Minolta LS 100 light meter.
Can you tell I'm excited?
I feel that it has the potential to be even brighter:
1. The Sony projector was in the upper booth, some 35 feet further from the screen than the centered IMAX projector.
2. The Sony was projecting though glass, reducing the brightness some 10%.
1. The Sony is LOUD - 82dB. Some sort of cover will have to be created.
2. Cooling is very important - Ducting for cool intake and hot exhaust will have to be created.
More to come!