Projector Lens Shift


Everything To Know About Projector Lens Shift

If you’ve been using projectors for different purposes, you would know that they need to fit the image perfectly onto your projector screen. Some older projectors that just somehow don’t fit the image in at the right angle and space are next to useless. So, how does your projector fits into your screen? Note that all projectors are designed to fit into a variety of theater screens having different dimensions. If yours isn’t, there is a problem. To eradicate this issue, you must check different projectors and buy the one that fits well to your screen. Modern projectors contain a plethora of cutting-edge technologies to overcome fundamental problems that the previous generation of projectors had to face. One such problem was the lens shift, as some old projectors couldn’t handle that with efficiency. Here is more on lens shift and how your projector negotiates with it without compromising quality:

What Is Lens Shift?

projector lens shift horizontalLens shift is a highly sophisticated feature that almost all modern projectors have. At its core, the lens shift is your projector’s ability to move the projected image right or left, up or down, in all directions. However, the projector must be able to do that while stationary, not while being moved by the user. With Lens Shift technology, you can now adjust the lens to the image without compromising its performance. If you have a projector with no lens shift, getting it to sit in the perfect spot will be a little bit of a challenge. It will take you a while messing around until you get the right distance yourself, but you can save so much time with lens shift. This is especially useful if  you like to move your projector around or use it in different rooms.  A fixed throw angle projector can be very difficult to use in this case. It causes the image to come out looking like a trapezoid. You will have to manually use a keystone correction technique to fix it.

Types of Lens Shift

types of lens shift

Some projectors support only the vertical lens shift or partial lens shift. These projectors will move the image in vertical direction i.e. up and down. These projectors, though limited in functionality, are still able to provide better-projected images with adequate lighting and sacrificing fewer pixels. The width of the projected image varies by the type of projector. Some models have the height reaching about half the screen, while others can churn out images reaching three or more screens. If you want to project images on a ceiling mounting, you need huge vertical lens shift. With no lens shift, your projected visuals will keep going here and there and might suffer effects of key stoning.

The horizontal lens shift is meant to adjust projected images horizontally. By default, it will calibrate your images from side to side and will require you to place the projector off-center in a horizontal position from the screen. Regarding performance, the horizontal lens shift is not as elaborate and high quality as its vertical counterpart. Still, the horizontal lens shift is leaps and bounds better than key stoning and other vintage methods to adjust image quality on projectors. It was calculated that horizontally projected images could vary from 5% to 50% of the projected image, which is not acceptable in most cases, but it does the job reasonably well in some cases.

All in all, projectors with enhanced lens shift capability are available at reasonable prices. If you are to buy one, make sure your projector supports proper lens shift features.

Check out the BenQ W1070 if you are looking for a great, reasonably priced projector that has Lens Shift technology: 

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