Originally Posted by Ftoast
It sounds like you want the nitpicking over science/belief systems to end, but in an earlier sentence declare comparison with a centered matte-white to be a science/belief unworthy of consideration or even curiosity.
No...I'd say he's pretty clear on it all. In an ambient light situation, comparing a White to a ALR surface is of no real value, as far as which will perform "ALR" duties best. I mean really.....
Now if the goal of the requester is to show the difference between the two in a Darkened room, as long as the PJ was calibrated to the Grey, one could use that to determine the overall performance of the ALR screen.
The only real reason the request keeps coming up for either On or Off Axis White vs Grey comparisons is attempt to show that somehow the Grey will look darker than the White. Well it will.....if the Grey has less than a 1.0 gain factor.
But really, because the OP dared to state that to him the screen does everything it's supposed to do, he's hit with all the same old tired requests, people trying to prove old arguments, others telling him to Go off and just watch his screen if he likes it so much, and doubting or disclaiming his own judgements, telling him that if it's not done to their own liking, then it has to be wrong.
I've been hit with that more than anyone else, but brush most of it aside because I let individuals who actually have made an attempt... a honest real effort to make up a full size screen and do it all by the book (my book
) post up about how / what they accomplished and as to if it was equal to, or surpassed their expectations.
NU_FTW, not only did that, he made the effort to test the differences between known ALR screen materials and the screen he just finished. He didn't use a white sample because White wasn't invited to testing between ALR surfaces. This much should be understood...that he realizes that white is not a ALR surface, it's white, and merely shows what a white can do. So it's use is / should be restricted to it's ideal environment. He's after some real ALR performance...not what a white will obviously fail at doing. That should be easy enough for anyone to understand. After all...when did anyone see a ALR screen Mfg ever put a white material anywhere within their screen's border, and then say anything other than; "See how much better our ALR screen is than the White material !!"
.......such a "Duh" claim is nothing but senseless hype, something that can only show good things about their Mfg Screen. Nor do you see images taken far off axis and compared directly to on-axis shots. But they are always quick to claim how well they can do such.
The real truth is that any projected point of light MUST eventually fade at the edges, and what really matters is if one can see that effect within the confines of the Screen's viewing area. If a PJ has known specs as far as light uniformity, then any more severe loss of either at the Screen must be tied to the Screen's own performance. Viewing cone performance limitations follow the same mandate because it's directly tied to whatever amount of light is being collected and directed / redirected off the Screen's surface at any given location except directly on-axis.
And the screen shots show nothing but great screen-wide reflection, and no perceptible dimming at all .....or at least so little dimming as to be inconsequential. OK...so that means the only thing left to do is to attempt to define exactly how much dimming there actually is....which also equates to how much light "isn't
" being lost. And all that because someone believes that such small degrees of loss actually mean anything as far as judging as to if the application is worthy of note.
Now does knowing the precise amount of the dimming actually matter? No.
Will somebody still use the lack of such info to grab the opportunity to question the veracity of another person's posted observations? The answer is all to well known.
So...instead of some individuals looking at the results and at least trying to find common ground, they state that it's not enough...he didn't do this or that, and what he's stating he sees and takes pictures off is not accurate enough, or simply to insufficient to draw valid conclusions from.
All because he's not showing the difference between a White surface and a ALR surface. Again with the