Originally Posted by sj233
How big was your screen? I have a 150 inch screen with a dedicated dark room. Any suggestions between HT35550/HT5550/TK800M. I’ve been waiting for TK850 in the meanwhile.
Sent from my iPhone using Tapatalk
If you have a dedicated dark room that will enable you to have a projector with good blacks. The HT3550/5550 have RGBRGB color wheels, but they might not bright enough. The TK800M has a RGBW color wheel with worse color performance.
Use this website for the 5550 or other models. Note that the estimated brightness is in the highest lumen output.
Are the projectors are bright enough for an 150"?
Take the dimensions of the screen.
Find out the square footage:
Find a review which has measured the lumens for each mode and lamp mode.
Apply the effect of the zoom lens has on brightness. Noted in the reviews.
Apply screen gain.
Divide lumens by square footage.
Lamps loose about 25% of their brightness in the first 500h, then it's a linear loss to the lamps rated hour value, which is 50% of it's original value.
A 150" screen 16:9 format has 66.71 ft².
The lumen values in the reviews are with the widest lens position, so most zoom. The percentage of lumens loss resulted from zooming out is noted in the reviews.
The 3550 in Cinema mode on Eco lamp has 599 lumens.
599/66.71 is 8.9fL.
In Cinema mode with Normal lamp it's 785 lumens. That results in 11.7fL.
The general recommendation is 15fL for SDR and 30+fL for HDR.
The 5550 is a bit brighter. Cinema in Normal lamp is 899 lumens and 612 in Eco lamp mode. That is 13.42fL and 9.17fL respectively.
Vivid has Brilliant Color activated (I think), which has a negative impact (in some (rare) cases it's positive) on picture quality.
The 3550 in Vivid on Normal lamp has 708 lumens. That's 10.61fL.
The 3550 in Vivid on Normal lamp has 1226 lumens. 18.37fL.
And remember the zoom lens has an effect on brightness and the lamp dims with time.
No TK800M review, but there is one for the TK800:
Cinema mode on Normal lamp is 1792 lumens and 1147 lumens in ECO. That is 26.86fL and 17.19fL.
Vivid has the same values since on this unit BC is turned on in Cinema mode as well, and it seems to have a positive impact.
Without BC the lumens are are reduced by 55%. So Cinema in Normal lamp is 985.6 lumens and Eco is 630.85. That's 14.77fL and 9.45fL.
The TK850 is probably going to have similar lumens as the TK800.
For such a large screen the Epson HC4010 or 5050UB are alternatives. The HC4010 has a 10GB HDMI chip, so no 4K 60Hz HDR, 24Hz at the most. So no 4K HDR gaming. They have other features, like motorized zoom. The 5050UB is the best (new) model when it comes to black level/contrast under 3K$. The HC4010 has less contrast than the 5050UB.
They do have a lower pixel count of ~4m as opposed to ~8m on the Benq's, so will be less sharp. If the difference is visible depends on the screen size, seating distance, material used. I assume with a screen that big, unless the seating position is far away, there will be a difference in sharpness. Contrast increases perceived sharpness (on the 5050UB), but the Benq's are considered more sharp.
They are brighter. The 5050UB is a little brighter than the HC4010.
The HC4010 in Cinema mode with High lamp mode has 904 lumens, and 588 lumens in ECO.
That's 13.55fL and 8.8fL.
There are brighter modes which are perfectly serviceable.
Bright Cinema has 1704 in High lamp and 1108 in ECO.
That's 25.54fL and 16.6fL.
The 5050UB also has a manual iris which can be used to curtail the light output if it's too high.