AVS Club Gold
Join Date: Nov 2002
Location: Byhalia, Mississippi. Waaaay down in the Bottoms
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First, one should always forget about any fractional differences that fall "below" a lower number, and especially the "Width". It is always easier to zoom out than pull in, because the screen's image will always lose or gain proportionately more size in the height as zoom is adjusted.
Secondly, every PJ can have a varying degree of difference in how it renders a given Format. There is almost a full 1" difference between say...a BenQ7000 and a Epson 5020UB in both the Height & Width of a 16:9 image. Although it is no real comfort, you can at least stop beating yourself up over the "mistake" because Mfg Screens almost all have the same type issues, with they seldom matching a given PJs image absolutely correct.
THAT is why since ancient times, the use of a Black Boarder for masking light overspill has been universally accepted. You can imagine there are probably more than a few utlra expensive "Zero Edge Screen" owners who have found out the hard way that their 'so cool' Screen fails to live up to their expectations in that simple regard.
But the third point is...if you already had the PJ, is there a reason you did not shoot your desired size image onto a wall and take specific measurements of both dimensional parameters? In DIY Screen making, that is one particular advantage inherent in the process.
To quote James T. Kirk;
"I'm laughing at the superior intellect"