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 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.

Image Width (IW)

IW x 1.5 = New Image Width (with Conversion Lens)

Consider that your current image width is 96" and you place a Navitar Wide-angle ScreenStar Conversion Lens in front of the projector's standard lens, your new, larger image width will be:

IW x 1.5 = New FL
96 " x 1.5 = 144" New Image Width

Distance (D)

D x 0.65 = New Distance (with Conversion Lens)

Consider that you currently place your projector at a distance of 13 feet from the screen. If you place a Navitar Wide-angle ScreenStar Conversion Lens in front of the projector's standard lens, to maintain the same image size, you'll be able to move your projector 33% closer to the screen. Your new, closer distance will be:

D x 0.65 = New Distance
13 ft. x 0.65 = 8.45 ft. New Distance

Wide-angle SSW08 Conversion Lens Formulas and Example Calculations

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 Wide-angle ScreenStar Conversion Lens in front of the projector's standard lens, your new focal length will be:

FL x 0.8 = New FL
1.10-1.40 x 0.8 = 0.88-1.12" New FL

Note: When the focal length ranges between two numbers, as in the example above, multiply each number by 0.8 separately for your new focal length range using Navitar's Wide-angle Conversion Lens.

Image Width (IW)
IW x 1.25 = New Image Width (with Conversion Lens)

Consider that your current image width is 80" and you place a Navitar Wide-angle ScreenStar Conversion Lens in front of the projector's standard lens, your new, larger image width will be:

IW x 1.25 = New FL

Distance (D)

D x 0.8 = New Distance (with Conversion Lens)

Consider that you currently place your projector at a distance of 20 feet from the screen. If you place a Navitar Wide-angle ScreenStar Conversion Lens in front of the projector's standard lens, to maintain the same image size, you'll be able to move your projector 17% closer to the screen. Your new, closer distance will be:

D x 0.8 = New Distance
20 ft. x 0.8 = 16 ft. New Distance

Telephoto SST120 Conversion Lens Formulas and Example Calculations

Focal Length (FL)

FL x 1.20 = New Focal Length (with Conversion Lens)

Consider that your current focal length is 1.10-1.40" and you place a Navitar Telephoto ScreenStar Conversion Lens in front of the projector's standard lens, your new focal length will be:

FL x 1.20 = New FL
1.10-1.40 x 1.20 = 1.32-1.68" New FL

Note: When the focal length ranges between two numbers, as in the example above, multiply each number by 1.20 separately for your new focal length range using Navitar's Telephoto Conversion Lens.

Image Width (IW)

IW x 0.83 = New Image Width (with Conversion Lens)

Consider that your current image width is 80" and you place a Navitar Telephoto ScreenStar Conversion Lens in front of the projector's standard lens, your new, smaller image width will be:

IW x 0.83 = New FL
80" x 0.83 = 67" New Image Width

Distance (D)

D x 1.2 = New Distance (with Conversion Lens)

Consider that you currently place your projector at a distance of 20 feet from the screen. If you place a Navitar Telephoto ScreenStar Conversion Lens in front of the projector's standard lens, to maintain the same image size, you'll be able to move your projector 20% farther away from the screen. Your new, longer distance will be:

D x 1.20 = New Distance
20 ft. x 1.20 = 24 ft. New Distance

Telephoto SST150 Conversion Lens Formulas and Example Calculations

Focal Length (FL)

FL x 1.5 = New Focal Length (with Conversion Lens)

Consider that your current focal length is 1.18-1.80" and you place a Navitar Telephoto ScreenStar Conversion Lens in front of the projector's standard lens, your new focal length will be:

FL x 1.5 = New FL
1.18-1.80 x 1.5 = 1.77-2.7" New FL

Note: When the focal length ranges between two numbers, as in the example above, multiply each number by 1.50 separately for your new focal length range using Navitar's Telephoto Conversion Lens.

Image Width (IW)

IW x 0.67 = New Image Width (with Conversion Lens)

Consider that your current image width is 96" and you place a Navitar Telephoto ScreenStar Conversion Lens in front of the projector's standard lens, your new, smaller image width will be:

IW x 0.67 = New FL
96 " x 0.67 = 64" New Image Width

Distance (D)

D x 1.5 = New Distance (with Conversion Lens)

Consider that you currently place your projector at a distance of 13 feet from the screen. If you place a Navitar Telephoto ScreenStar Conversion Lens in front of the projector's standard lens, to maintain the same image size, you'll be able to move your projector 50% farther away from the screen. Your new, longer distance will be:

D x 1.50 = New Distance
13 ft. x 1.50 = 19.5 ft. New Distance