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Can the image be reversed and flipped?
Yes. When you mount the projector on the ceiling, you must flip the image so it appears right side up on the screen. To flip
the image, press the Menu button on the keypad. Go to Main > Settings > System. Select the Ceiling checkbox.
You can also reverse the image for installation in a rear projection system by activating the Rear Project option. In a rear
projection system, the projector is mounted behind a piece of opaque or frosted glass. The image projects on the back of the
glass. To reverse the image, press the Menu button on the keypad. Go to Main > Settings > System. Select Rear checkbox.
How far from the table top or the ceiling is the image cast by this projector? What is the image offset for this
projector?
In 4:3 aspect ratio, the offset value is 112.2%. At a 16:9 aspect ratio, the offset value is 132.9%.
What is image offset? The 'image offset' percentage for a projector tells you where the image will appear in relation to the
plane of the lens. An image offset of 0 means that half of the image is above the lens plane and half is below. An image
offset of 100% means that all of the image is above the lens plane, with the bottom right at the lens plane. An offset value of
more than 100% means that the image appears a distance above the lens plane, or below the lens plane if the projector is
mounted on the ceiling (pictured below).
Why have image offset?—ASK Proxima adds image offset so the image can be projected at a good viewing level, and still
maintain its rectangular shape. In other words, with image offset, you avoid keystoning, where the image is larger on top
than on the bottom.
This projector has two different offsets, depending on whether the aspect ratio is 16:9 or 4:3.
16:9 aspect ratio — At a 16:9 aspect ratio, the offset value is 132.9%. The top of the image is lower than when projected
in 4:3 ratio-.125 of the 4:3 image height. This is because a 16:9 image that is the same width as a 4:3 image is also one-
eighth smaller on the top and one-eighth smaller on the bottom.
4:3 aspect ratio — In 4:3 aspect ratio, the offset value is 112.2%. This means that the bottom of the image is 12.2%
above the lens plane. In the diagram above, you can see that the image offset allows the screen to be mounted lower on the
wall (note that the projector is upside down so the image appears to be below the lens plane).
Calculating image offset (16:9) — The image offset amount varies, depending on how far away the projector is from the
wall and by how big the image is. To calculate the amount of offset, multiply the image height times .329. (Note: you can
find the image height by using the ASK Proxima Projection Calculator). For a 50" tall image, the top of the image will be the
distance between the ceiling and the lens plane plus 16.4".
Calculating image offset (4:3) — To calculate the amount of offset for a 4:3 aspect ratio image, multiply the image height
times .122. (Note: you can find the image height by using the ASK Proxima Projection Calculator). For a 50" tall image, the
top of the image will be the distance between the ceiling and the lens plane plus 6.1".
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