Originally Posted by Dave in Green
, in your search for the best projector for yourself just understand up front that whatever projector you end up with is going to be a compromise. Each projector model has a different balance of pros and cons. What you need to focus on is finding the one with the best balance of pros that are most important to you and the cons you can most easily tolerate. In your search you will find that there are enthusiastic fans of many different projectors on this forum who can sometimes argue passionately that what works for them is the best choice for everyone else.
Sometimes it helps to look for more objective reviews from professional reviewers who provide factual data and technical information about all the pros and cons. For example, two projectors being discussed here -- the Epson Home Cinema 1060 and ViewSonic PX747 -- were both reviewed by projectorcentral.com. I think that reading the two reviews linked below will give you a better understanding of these two different types of projectors:
Thanks for posting the ViewSonic PX747 review Dave.
It's interesting as Projector Central verifies 3100 ANSI or white light lumens in its Bright Mode for the PX747. They also state that the lumens drop to 26% of that value when the projector is showing color or a movie and that "The overwhelming amount of white light in the mix causes color subject matter to appear quite dull and low in saturation."
3100 x 26% = 806 lumens.
Projector Central also states that the PX747, in Movie Mode, puts out 1600 ANSI or white lumens and 57% of that value for color lumens for ~900 lumens.
If I assume the Bright Mode and use the 900 lumens from the Movie Mode (being generous), that would equate to 5.3fL on a 250" 1.1 gain screen or ~33% of the SMPTE 196M target. Again, far too dark in my opinion.
Switching to a 165" 1.1 gain screen, the numbers come in at 12.3fL. While that number is very watchable and much more so than the 5.3fL value, it's still on the lower edge of the SMPTE 196M target. And the projector is still straining with color output.
Using a 144" 1.1 gain screen, with 900 lumens, the numbers come in at 16fL which also happens to be the SMPTE 196M target value.
SMPTE 196M target = 16fL open gate/white light fL = (Illuminance in Lumens / Screen Area in Ft2) * Screen Gain
Using the Epson HC1060, based on Projector Central's 2533 color lumen measurement, a 250" 1.1 gain screen will produce 15fL. I won't bother to post the smaller screen values as the numbers clearly go above the SMPTE 196M target. Color values are good based on the same review with the weakness being black levels.
I also own the HC1060 and have used it on a 200" 1.1 screen with good results but competition from Moon and Starlight can sometimes leave you wishing for a little more horsepower. A 165" 1.1 gain screen with the HC1060 (or any projector putting out 2500 color lumens) is maybe the sweet spot between size and low cost projector. If you drop down to a 144" screen on the HC1060, it's like watching a large LCD TV outdoors. I'm sure the ViewSonic PX747 will be similar or better when considering DLP technology attributes on the same 144" 1.1 gain screen.
My point to the OP was simply that using a screen of 250"+ can be a challenge for a low cost projector. Expecting to use most any projector outdoors with the sun up, even in the shade, is not realistic. The SMPTE 196M target is a value assumption based on a dark room. Using a projector outside at night requires the projector/screen combination to overcome Moon and Starlight, as well as street lights, and lights from your own or neighbors house if applicable, making a target value of 20fL or more a very reasonable goal.
On the other hand, if you just want to throw something together without regards to brightness, picture quality, etc., that's OK too!