Ask Proxima M1 (DP1200x) User Manual

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How far from the table top is the image cast by the M1? What is the image offset for the M1?

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.

The M1 image offset is 112%.

4:3 aspect ratio—In 4:3 aspect ratio, the offset value is 112%. This means that the bottom of the image is above the lens

plane. In the diagram above, you can see that the image offset allows the image to be projected higher on the wall than the

table top so that it is more visible.

16:9 aspect ratio—At a 16:9 aspect ratio, the bottom of the image is higher 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.

Calculating image offset—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 .112. (Note: you can find the image

height by using the ASK Proxima Projection Calculator). For a 50" tall image, the bottom of the image will be the distance

between the table and the lens plane plus 5.6".

What kind of screen should I use with the M1? Can I use a light colored wall?

First, for best results, we do not recommend casting images (especially video) on a light colored wall. While you will certainly

get a viewable image, the color reproduction will not be accurate. Wall textures may also create image artifacts.

What screen you use depends on the viewing audience and the amount of light in the room (ambient light). Say the seating

arrangement requires that you have a wide viewing angle and that the room has some ambient light. Choose a screen with a

lower gain (for example, a DaLite HC-Da-Mat, a gray screen with 0.8 gain). If your viewing angle is narrower, you can

choose a higher gain screen (for example the Stewart Grayhawk). Higher gain screens are also better for images larger than
100" wide. One issue to be aware of is that the higher the gain on a screen, the more likely you will notice "hot-spotting" and

sparkles in the image. You should work with your screen supplier to make sure you get the appropriate screen for your

circumstances. Find more information at DaLite Screen Company or Stewart Filmscreen Corporation.