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As I recently figured out, someone made some wild adjustments to my ECP that caused me to use too much keystone. I am still using too much IMO and would like some other opinions
My screen is 52†high by 92†wide. Using the 1.5 x width, I have a 138: throw distance. A 92" 16:9 screen relates to a 69†high 4:3 screen. The difference between the 2 screens is 17, divided by 2 =8.5â€. That means I should/could be 8.5†above my 52†screen in the “normal†position. Should the projector be more or less level at this position? I am actually 6†below the top of the screen, so I should be well within specs to use no keystone…but it’s still at 6-6.5. I also have to tilt down the pj (the full 15 degrees) to get the image on the screen. I know this isn't right, but I have just now started to investigate.
So…I decided to tilt the projector up so it is level now and the bottom of the pix is in the middle of the screen. Again, I can tilt the front of the projector down, but it ends up at the full 15 degrees and I have to use the keystone. Is there something that should be checked that I'm not finding? Should I just use some mechanical "lens shimming" to get the picture where it should be? As M NEWMAN said once, at this level my pj is
dragging the ground." Any ideas?
My screen is 52†high by 92†wide. Using the 1.5 x width, I have a 138: throw distance. A 92" 16:9 screen relates to a 69†high 4:3 screen. The difference between the 2 screens is 17, divided by 2 =8.5â€. That means I should/could be 8.5†above my 52†screen in the “normal†position. Should the projector be more or less level at this position? I am actually 6†below the top of the screen, so I should be well within specs to use no keystone…but it’s still at 6-6.5. I also have to tilt down the pj (the full 15 degrees) to get the image on the screen. I know this isn't right, but I have just now started to investigate.
So…I decided to tilt the projector up so it is level now and the bottom of the pix is in the middle of the screen. Again, I can tilt the front of the projector down, but it ends up at the full 15 degrees and I have to use the keystone. Is there something that should be checked that I'm not finding? Should I just use some mechanical "lens shimming" to get the picture where it should be? As M NEWMAN said once, at this level my pj is
dragging the ground." Any ideas?