The more squares there are, the sharper the image. A projected image is made up of thousands of tiny little squares or pixels. Since we are blowing up the image big enough to cover a house, it makes quite a bit of difference in the final look. The resolution of the projector determines how sharp the projected image will be. They are also difficult to protect in a box since they use a mirror on the top rather than a lens in the front. You will be forced to put the projector so close to the house that it will produce strange shadows since a house is not flat like a screen. They will produce an even larger image with less distance (.25:1 throw ratio), but for projection mapping, that can be bad. You may also see “ultra short throw” projectors. On the other hand, if the description of the projector does not mention “short throw”, then it almost certainly is standard throw because that is most common. However, the term “short throw” is an important feature, so it will definitely be mentioned if the projector has it. Unfortunately, the exact throw ratio is often left out of the projector specifications which can be confusing. As you might expect, they are also a bit harder to find. Short throw projectors tend to be more expensive because it costs more to make the lenses. 30 feet of distance with a short throw projector will get you an image about 60 feet wide! That will definitely work for the majority of houses. That means for every half foot of distance the image will be about 1 foot wide. A typical short throw projector has a throw ratio of about. However, most people will want to use a short throw projector instead. If you have a large property or your neighbors across the street don’t mind you projecting from there, it is possible that you could get enough distance to make it work. You will need a lot more distance to get an image large enough to cover your whole house. Unless you have a very small house, that is probably not big enough. At that distance, a standard throw projector will produce an image about 20 feet wide. Let’s say you plan on putting your projector on the sidewalk in front of your house and your sidewalk is 30 feet away. Most projectors have about a 1.5:1 throw ratio which means for every 1.5 feet of distance the image will be about 1 foot wide. Throw ratio is simply how big the projected image will be based on how far away your projector is from your house. You need to pay attention to 3 main things: throw ratio, resolution, and brightness. In this article, we try to break it down to it’s simplest form so that you know what to look for. Figuring out what kind of projector to get for this kind of project can be a little intimidating.
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