Originally Posted by iwanrs
This is basically what I need:
1. Screen high from floor for 150" 16:9 screen, watching from recliner sofa, eye level at about 70cm high from floor. HT room is 5m x 8m.
2. Optimal Sony lens distance from screen, ceiling mount, any point between 5.5m to 7.5m. Brightness is important. Dedicated HT, no windows no outside light Bat-cave.
3. Sony lens center placing in compare to Screen top edge.
Hope you can give me some real bites.
Iwanrs, no offence, but based on your posts in the other thread you started on the topic, I think you should ask someone to help you install the projector.
As for your specific questions
1. your preference. I would put this screen around 40-50cm from the floor. Why don't you set up the pj temporarily and try what is comfortable for you?
2. You could use the Projectorcentral calculator to determine the possible range of projector distance from the screen. This data for your specific screen size 150" diagonal(?) is also listed on page 80 in your manual. https://docs.sony.com/release/VPLVW1100ES.pdf
The projector distance from your screen can be between 447 – 973 cm (or 176 – 383 in.) as listed. It is your choice in this range. The closer you put the projector (in this range) the brighter image you get. The farther you put, the more uniform the light distribution will be (this may not be noticable with this excellent projector).
Based on the above, ideally you may put the projector somewhere around 450-500cm from your screen to maximize light output. But it all depends on the design of your room and your preferences also.
3. On page 80 of the manual the projector's lens shift range is listed. Based on this, the answer to your question is 0-48,8cm from the top edge of your screen (if your screen is 150" diagonal 16:9). it is fine anywhere in this range.
Also, on the other thread you say you will get a 2,4 gain sreen. this is completely unnecessary and I would advise against it unless you always want you use the projector with the room lights on.
As you say your room is a Bat cave, a 1.0-1.3 gain screen will give you a very bright picture with this projector and screen size. A higher gain screen will compromise your image quality and really not needed.
This projector has around 1700-1800 Lumens calibrated light output (according to reports in this forum), so if you put your projector around 5meter from your 150" screen you'll get around 26 ft.Lamberts screen brightess with a 1 gain screen and around 34 ftL with a 1.3 gain screen. That is plenty! your typical commercial cinema has around 14-16 ftL.
hope this helps