What is vertical offset of the projector?
Projector Offsets For example, a projector with a 100 percent vertical offset would project an image whose bottom edge is in line with the center of the lens and that extends upwards. A 150 percent offset lens would project an image whose bottom edge is 50 percent of the image’s height above the center of the lens.
How far does a projector have to be from a 110 screen?
Projection Distance
| Screen or image size | Projection distance (1) Minimum to Maximum | Screw hole number (2) |
|---|---|---|
| 80 inches (203 cm) | 110 to 121 inches (281 to 306 cm) | 4 |
| 100 inches (254 cm) | 138 to 151 inches (351 to 383 cm) | 3 |
| 120 inches (305 cm) | 166 to 181 inches (422 to 461 inches) | 2 |
| 150 inches (381 cm) | 208 to 227 inches (529 to 577 cm) | 1 |
What is vertical offset?
A, Vertical offset—the distance between a horizontal line extending from the base of the teardrop and the medial apex of the lesser trochanter. B, Medial offset—the perpendicular distance from the base of the teardrop to the longitudinal axis of the femur.
Does vertical lens shift affect picture quality?
This can cause text and graphics to be difficult to read in a commercial application, and destroy the image quality in home theater video. Like digital keystone correction, lens shift allows a projector to be off-center from the screen without having to tilt the projector to move the picture onto the screen.
Can you use a projector sideways?
You can put a projector on its side but this may significantly decrease the lifespan of your projector. While almost all manufacturers say not to turn a regular projector on its side, there are now projectors being made suited for being stood in such a position.
How far away should a projector be from a 100-inch screen?
Projection Distance
| Screen or image size (1) | Projection distance (2) Wide to Tele |
|---|---|
| 60 inches (152.4 cm) | 69 to 113 inches (176 to 286 cm) |
| 80 inches (203.2 cm) | 93 to 150 inches (235 to 382 cm) |
| 100 inches (254 cm) | 116 to 188 inches (295 to 478 cm) |
| 120 inches (304.8 cm) | 139 to 226 inches (354 to 575 cm) |
How big of an offset do I need for a projector?
Offsets in the range of roughly -50% (that is, 50% down) or more are good choices for positioning a projector on a bookshelf in the back of a room. The specific offset you need will depend on the ceiling height, height of available bookshelves, screen size, and how high you position the screen on the wall.
Is there a horizontal offset or vertical shift in a projector?
Offset is always vertical. More precisely, there’s no reason why a projector couldn’t be built with a fixed horizontal offset, but we can’t recall ever seeing one that was. The same comment applies to horizontal shift appearing without vertical shift—we’ve never seen it.
When to use Keystone correction on a projector?
Keystone correction is best reserved for when you have no other choice. For projectors without lens shift, if you know the offset you can easily tell whether the projector can be positioned above the screen, below it, or somewhere mid screen without needing to tilt it by looking at the percentage of offset.
Which is the correct way to position a projector?
These are supposed to tell you where you can, or have to, position your projector—whether up, down, left, or right—relative to the screen to avoid keystone correction. But the specs can often be misleading or confusing. One major problem is that there is no standard among projector makers for describing either one.