Originally Posted by dmillionz
When Chad B was here, I was using the 2.35:1 zoom function as it was the only way to fill my 2.35:1 screen perfectly. I thought this was strange because I used the Sony 2.35:1 guidelines to size the image. Even when doing this it required the zoom. Chad spoke against using the zoom due to it artificially enlarging the image and providing lower resolution than the unzoomed 1:1 pixel image. He demonstrated this on a pattern where the zoomed image was not as clear on the 1x1 and 2x2 pixel graphs but was dead on for the unzoomed image. The 1x1 and 2x2 charts resolved perfectly. Is there something else I can do to zoom the image to fill the screen and eliminate blank space on the sides and keep a true pixel perfect 4K image? I have no room left to move the projector back to fill the screen otherwise.
To answer your question I guess the only way to make the image larger and not zoom with the lens you have to move the projector back until it fills the screen . You are finding a best (sweet spot) for resolution by locking the focus , moving the projector to get the image size necessary . This is not practical, nor the way most install, projectors have zoom range for a reason . One option is use a anamorphic lens , anamorphic stretch mode on the projector. In fact the anamorphic stretch method utilizes more of the SXRD panel giving even more detail than the 2.35:1 zoom method you are using now, by 25-30% . You'll get increased resolution and brightness , more if you use the FULL SXRD panel ( 17:9) combined with the Paladin DCR lens . Only your VW885 and VW5000 have 1.24X stretch which when combined with the new Paladin DCR lens ,another 5% realized . Others will have to use a Lumagen to stretch 1.24X , I'm not sure if any player is capable .
When Chad suggested , avoid enlarging the image with lens zoom to retain perfect image resolution , I assume he is referring to a sweet spot somewhere in the mid zoom range. No doubt this is what many do when checking resolution on a pattern to check resolution and uniformity , the majority of users never are in this sweet spot . If you want the very best resolution possible , focus remains in the sweet spot , you accept the image size on screen or move the projector to the position with fixed fixed zoom to get the image size you want , accept the brightness and contrast outcome from that position .
Projector position is always a compromise , you have to work out the what strength most important for you . Best resolution , brightness and contrast are never in the same place , most figure out something in the middle or other variables dictate .Anamorphic lens , high gain screens, ALR screens and high contrast grey screens all help to compensate when a projector is weak in certain areas . I wouldn't worry to much about a little zoom deviation anyway ,it's only at the extreme end of the zoom range do we see a little softness in the image or loss of detail at the corners . You'll need a pattern to even see this most of the time and nose to the screen .
This is a good point for all to remember though
. If you want to check the "best" resolution for your projector you have to know what zoom position that is ,even then you'll have to tweak it . Most that are unaware simply throw up a pattern to check resolution , the zoom is not ideal . In these cases the test can reveal less than the best resolution possible on a 1 pixel test , owners unknowingly make the assumption the projector has issues .