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. The zoom and lens shift of the Z5 made it an obvious choice for me. Using optional lenses, projectors can handle projection distances near and far. Horizontal Easy-Slide Image Correction. 50-75mm, f2.0 – 2.6. You can make a long throw projector to short-throw by checking the settings of the projector, make metal support, use a 3Dprinter to accurately incline the lens, and start a test run. 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. Lens options allow users to choose the motorized lens most suited for their environment, and a quick-release lever allows for easy lens exchange. 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. The projector is sat on a shelf projecting onto the opposite wall. The zoom feature in a projector can be achieved digitally or optically by rearranging the lenses inside the Lens assembly. I've thought about moving the projector and using a … Everything is fine apart from the size of the image. 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. The increase or decrease can be predicted by the zoom ratio. 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. I'm 100% happy with my 80" 16:9 screen at my viewing distance but 2.35 material is underwhelming, because I'm using the maximum zoom to even achieve this size an anamorphic lens is out of the question. For a bigger projection, move the projector away from the wall. When dealing with projectors, the mounting position is extremely critical to proper image placement. Likewise, the lens must be on center, which you find out if the left or right side isn't the same size. Is there some sort of lens I could add to shrink the image size a little? 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. You can project as big or small as you like. Smaller images are projected over longer distances with lenses of longer focal lengths, while larger images are created with shorter focal lengths. The projector's image size is determined by the distance between the projector itself and the screen. 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. There are different uses of the short throw if you want to make smaller images on … 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 … 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. I've got the zoom already dialed down to the minimum. The projector also has manual zoom control to adjust image size. 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). Most manufacturers will give an f-stop specification over the entire focal length of a lens, i.e. A projector with the zoom lens enables you to make the picture on the screen larger or smaller without having to move the projector. This is the space i want to be filled with the image. 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