Image Position and Adjustment
A projector that gives you simple control of image alignment makes using your projector effortless.
Manual adjustment should require only a few steps. Having a physical adjustment button or slider on the projector keeps you from having to go into the menu to change your settings. Automatic adjustment is an even greater benefit, allowing instant alignment with no need for user control of any kind. Most projectors have some degree of adjustability, but some are more advanced than others. Here are some methods of positioning your projected image:
Horizontal and Vertical Keystone Correction
When a projector is not centered directly in front of the screen but tilted or angled toward it, the resulting image will be distorted into a trapezoidal shape. However, keystone correction will correct this so the picture will be perfectly rectangular. This can be done manually or automatically.
With automatic keystone correction, the projector will automatically detect and correct the distorted image, with the touch of a button. A vertical keystone correction aligns the distortion on the top or bottom of the image, and a horizontal keystone correction aligns the distortion on the left or right side.
Lens shift allows the lens to move vertically and/or horizontally within the projector to provide a perfect, straight-edged image with uniform focus. This allows for more flexible installation and placement options for the projector, with no loss of resolution. A vertical lens shift allows the projector to move the image up and down, and a horizontal lens shift allows a lens to move from side to side.
Like keystone correction, lens shift corrects the distortion of the image. However, lens shift has no loss in the quality of the image, since there is a physical movement of the lens to account for the adjustment rather than an alteration of the image itself for the correction.
Screen Fit is a quick-setup function with an auto-sensing feature that intuitively sets up the correct screen size, keystone and focus — all at the touch of a button. Screen Fit uses a sensor that is on the front of the projector, to automatically correct the shape and position of images to fit properly on the screen.
Epson's innovative Quick Corner feature helps you move any of the four corners of an image independently using the remote control, to help achieve a perfect, rectangular image.
Optical zoom is a function of the lens allowing you to increase the image optically without distortion or loss of image quality, while digital zoom, which simulates optical zoom, is a function of the projector allowing you to enlarge a portion of an image.
Some projectors have lenses that can be changed. if a projector allows for optional lenses, you have greater flexibility on where you can position the projector in relation to the screen. Lens options allow users to choose the motorized lens most suited for their environment, and a quick-release lever allows for easy lens exchange. Using optional lenses, projectors can handle projection distances near and far.
Horizontal Easy-Slide Image Correction
To make quick horizontal image adjustments, the easy-slide control bar is a manual toggle on the top of many Epson projectors that easily corrects the projected image.