If you are uncertain about which lens you need, the projection chart for your
projector format can help you determine the appropriate lens for your application
based on screen size and projection distance. Use the chart as a guideline when
determining which focal length lens is appropriate for your application. Then,
check the List of Available NuView Lenses,
find your projector manufacturer and model, and look for the lens you require.
Unfortunately, not all lens sizes are available for all projector models.