Originally Posted by curttard
Interesting. I am in fact at max zoom and shortest throw when zoomed out for 2.35, but not for 16:9. I also have to say that this is not something I'd ever notice when actually watching video rather than looking at a stationary test pattern.
Yeah...I know...but not so strangely, some like to use exactly that sort of observation to supposedly show how a screen exhibits Hot Spotting.(warm spotting) I stopped paying attention to such proselytizing a long time ago because all it amounts to is someone grasping at something...anything to dismiss something they do not want others to accept as being valid and workable. So they insist that if such a thing is apparent, it must be corrected. This results in "over-correction" and limits a DIY Screen's ability to do a variety of service and instead severely limits it's range thereof.
A Blue Screen w/Test pattern, or just a blue Start-Up Screen is not a good indication of what a PJ's performance under actual content viewing will be. The same thing goes for taking a shot of a projected image, then inverting it into a negative. Such "tricks" will always tend to ex calibrate any variance in light...but those variances are NOT visible under normal conditions.
The more aware you become about such things and how they relate to real-world viewing, then more you can separate the hyperbole and misleading references. When you see others depend on such things to prove a point, that should tell you much about why they do so and how deceptive they can be if their motives and goals demand such.
The truth is, a sub-1.0 gain surface visually shows less such aberration because frankly, it's simply showing less of everything
yet take a "negative" shot of such a screen and lo & behold....there that 'ol "warm spot is. Another truth....only a very few DIY Screens can achieve what amounts to 1.3 gain or higher without having image quality be grossly affected. The final truth? There exists a wide gap between what some feel is perfect...what others feel is perfectly acceptable...and what some feel is wholly unacceptable. Having any DIY Screen application that is completely adjustable along whatever demands and desires a DIY'er wants to place upon a given situation is almost priceless. All you really have to do is zone in on what you really want / need...accept what it takes to reach that goal...and then Get'ter Dun!
In your case, viewing distance as relates to Screen size, as relates to your own visual acuity determines how satisfied your going to be. Higher gain screens can seldom avoid any vestige of graininess, especially if any real degree of ambient light viewing potential is desired. RS-MM-LL has the highest gain possible without creating undue graininess. So much so that virtually no one ever makes comment about seeing such. However, some people with big screens who sit close, and have 20-10 Lasik vision will notice...if they try hard enough or have it pointed out to them.
The same applies to any mild degree of warm spotting. During the playing of actual content...it's never an issue....never. Yet it can be seen in specially taken photos or when a bright, monotone color image field is shown.
Your being pretty meticulous in your efforts so I'm fairly confident your going to be both subjective and objective with your final conclusions. But most of all, fair and sensible in your determinations.
Until you reach that point, be sure to pose any final Questions before you go so far as to have to ask "How come?" or worse....."Why the hell did I.....???!!!"