The zoom feature in a projector can be achieved digitally or optically by rearranging the lenses inside the Lens assembly. Everything is fine apart from the size of the image. One thing to keep in mind is that the light output from a zoom lens will vary as you make the image larger or smaller. Ive bought a TDP-S21E Projector. The image shape you are getting means that the projector is turned slighty towards the left of the screen and is positioned slightly too far to the right of the centre of the screen. For a bigger projection, move the projector away from the wall. The projector also has manual zoom control to adjust image size. When dealing with projectors, the mounting position is extremely critical to proper image placement. It seems like the image size might still be a little too big for certain types of films (e.g., with rapid, jerky camera movement I get a little queasy). Lens options allow users to choose the motorized lens most suited for their environment, and a quick-release lever allows for easy lens exchange. I've thought about moving the projector and using a … 50-75mm, f2.0 – 2.6. Heres the problem: The wall has a radiator on it with a space of about 5 foot to the celling. A projector with the zoom lens enables you to make the picture on the screen larger or smaller without having to move the projector. You can project as big or small as you like. The projector's image size is determined by the distance between the projector itself and the screen. I will just agree, you may have gone in a bad direction with a shelf instead of a mount that holds the projector upside down. The zoom and lens shift of the Z5 made it an obvious choice for me. Is there some sort of lens I could add to shrink the image size a little? As you move a projector away from the screen or wall, the image will get bigger, and as you push the projector closer to the screen or wall the image will be smaller. This is the space i want to be filled with the image. To properly fit your image onto a screen you need a projection calculator tool or throw chart to tell you the image size dimensions at the corresponding throw distance. Moving the projector closer to the screen will make the image smaller, and moving the projector farther from the screen makes the image size bigger. Likewise, the lens must be on center, which you find out if the left or right side isn't the same size. I set out to make an image projector that could be made from bits and pieces laid around the home.It allows you to draw (or print) images/text on transparency sheets and have them projected onto a wall/ceiling/whatever. Most manufacturers will give an f-stop specification over the entire focal length of a lens, i.e. Using optional lenses, projectors can handle projection distances near and far. If your projector does not have any horizontal lens shift then you will need to reposition the projector left a bit or move the screen position right a bit. For example, a 2-inch (50mm) lens will project a 1-inch diagonal image from a microdisplay imager about 12 feet wide when positioned 18 feet from a … The increase or decrease can be predicted by the zoom ratio. The projector is sat on a shelf projecting onto the opposite wall. I've got the zoom already dialed down to the minimum. It would be a telephoto lens in reverse, except that a telephoto lens is more forgiving because the objects are in focus and not distorted and are reduced in size to a small image. Smaller images are projected over longer distances with lenses of longer focal lengths, while larger images are created with shorter focal lengths. 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