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Solution Brief

The Benefits of Vertical Lens Shift

for Home Entertainment Projection

What you'll need

What you’ll need for easier, more accurate image positioning in any home entertainment environment:


  • A ViewSonic projector with Vertical Lens Shift, such as the LightStream Pro7827HD
  • Extreme flexibility for easy set-up and installation with 1.1-1.5 throw ratio, vertical lens shift and 1.3x optical zoom
  • Stunning image quality with 1080p native resolution, 2200 lumens & 22,000:1 contrast ratio
  • Outstanding color accuracy and detail with a new RGBRGB color wheel and ViewSonic SuperColor™ technology
  • Exclusive SonicExpert™ sound enhancement delivers an immersive multimedia experience
  • Wirelessly stream content or play games on a huge screen via PortAll™ HDMI/MHL connection enclosure
  • Flexible connectivity with one standard HDMI and two HDMI/MHL inputs, along with RGB, Composite, Component, Audio, micro USB, RS232 and RJ45 connectors

You’re comparing features on home entertainment projectors. What are the benefits of Vertical Lens Shift?


Achieving optimal image positioning, size and shape is critical to satisfying home entertainment viewing and is in large part dependent on the proper positioning of the projector and screen. The constrained spaces in many viewing environments, however, can make achieving this particularly challenging. Vertical lens shift is a tool that assists in properly aligning the projector’s lens with the projector screen, making it far easier to correctly mount or position a projector for optimal image quality. Projectors with vertical lens shift have the ability to move the projected image up and down to easily accommodate placement/installation at a variety of heights. Conversely, projectors without lens shift must be positioned with 100% accuracy to project an image with the proper shape and distribution across the screen.

Vertical lens shift enables users to:

  • Raise/lower the projected image without changing the angle relationship between the projector and the screen – eliminating the need to physically move the entire projector
  • Successfully install in spaces with limited vertical height, such as low 8-foot ceilings, whether ceiling mounted or placed on a rear shelf
  • Preserve head room in spaces that would otherwise require an extender pole for accurate positioning
  • Achieve correct image positioning without the need for compression and scaling (as used with Keystone correction), which can cause decreased resolution, artifacts, and often imperfect results