Canon SX7 Mark II
The REALiS is about as bright and powerful as compact projectors get.
Throw distance is definitely an important factor in choosing a projector for your specific needs. Below you'll find a table of how much throw distance you'll need to fill a screen of a certain size. The SX7 Mark II has a great zoom lens, which provides a lot of flexibility in how much throw distance you need.
The distance between the projector and screen can often dramatically affect the picture's brightness. The greater the distance, the dimmer the display. Below you'll find a few charts that list distances and screen sizes, along with how bright the displayed image will appear.
Unless you're in a perfectly dark room, your projector will have to compete with ambient light. The more ambient light in a room, the more washed out a projector's display will look. Below is a chart with different incidental light levels, ranging from near darkness to a well-lit office, and whether or not the projector will run into trouble in those environments. The short answer: it won't. The SX7 Mark II is ridiculously bright. The only place you'll run into issues is if you're trying to fill a 140" screen in a bright room.
Since you don't always have an $800 screen to display your image onto, we test how much the projector's picture quality suffers from being displayed on different surfaces, such as painted drywall or wood paneling. The SX7 Mark II had virtually no issues here. The image was still clear, even on the wooden surface. Additionally, the projector's auto calibration mode was great for displaying onto off-white or colored walls.
We didn't see too many optical issues with the SX7 Mark II. The main problem was some bowing along top edge: it was noticeably concave, up to an inch off from where it should have been. There was some minor pixel flare towards the outer edges as well. We also noticed some slight keystoning distortion, but it was fairly typical: straight lines would alternate between appearing thicker or thinner than they should.
The projector doesn't have any video processing features.
The projector's native resolution is 1400x1050, but it can also display 480p, 720p, and 1080i content.
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