How do I calculate my new focal length using a Navitar ScreenStar lens?
A1. Use the following formula to calculate your new focal length using the Navitar SSW065 or HDSSW065 Wide-angle ScreenStar Conversion Lenses Focal Length (FL) FL x 0.65 = New Focal Length (with Conversion Lens) Consider that your current focal length is 1.18-1.80″ and you place a Navitar SSW065 Wide-angle ScreenStar Conversion Lens in front of the projector’s standard lens, your new focal length will be: FL x 0.65 = New FL 1.18-1.80 x 0.65 = 0.76-1.17″ New FL Note: When the focal length ranges between two numbers, as in the example above, multiply each number by 0.65 separately for your new focal length range using Navitar’s Wide-angle Conversion Lens. A2. Use the following formula to calculate your new focal length using the Navitar SSW08 or HDSSW08 Wide-angle ScreenStar Conversion Lenses Focal Length (FL) FL x 0.8 = New Focal Length (with Conversion Lens) Consider that your current focal length is 1.10-1.40″ and you place a Navitar SSW08 Wide-angle ScreenStar Conversion Lens in fron
