Installation, Adjusting the projector zoom / focus, Adjusting projected image size – NEC LT20 User Manual
Page 18: English, Focus ring zoom lever, Diagonal, This graph is for user’s reference only

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English ...
63.4"
(160.9cm)
105.6"
(268.2cm)
147.8"
(375.5cm)
169.0"
(429.2cm)
211.2"
(536.5cm)
36.9"
(93.8cm)
73.8"
(187.5cm)
123.0"
(312.5cm)
172.2"
(437.5cm)
196.9"
(500.0cm)
246.1"
(625.0cm)
4.92'
32.81'
26.25'
22.97'
16.40'
9.84'
(1.5m)
(10.0m)
(8.0m)
(7.0m)
(5.0m)
(3.0m)
31.7"
(80.5cm)
Max.
36.9"(93.8cm)
73.8"(187.5cm)
123.0"(312.5cm)
172.2"(437.5cm)
196.9"(500.0cm)
246.1"(625.0cm)
Min.
31.7"(80.5cm)
63.4"(160.9cm)
105.6"(268.2cm)
147.8"(375.5cm)
169.0"(429.2cm)
211.2"(536.5cm)
Max.(WxH)
29.52" x 22.14"
(75.0 x 56.3cm)
59.04" x 44.28"
(150.0 x 112.5cm)
98.40" x 73.80"
(250.0 x 187.5cm)
137.76" x 103.32"
(350.0 x 262.5cm)
157.52" x 118.14"
(400.0 x 300.0cm)
196.88" x 147.66"
(500.0 x 375.0cm)
Min.(WxH)
25.36" x 19.02"
(64.4 x 48.3cm)
50.72" x 38.04"
(128.7 x 96.5cm)
84.48" x 63.36"
(214.6 x 160.9cm)
118.24" x 88.68"
(300.4 x 225.3cm)
135.20" x 101.40"
(343.4 x 257.5cm)
168.96" x 126.72"
(429.2 x 321.9cm)
4.92'(1.5m)
9.84'(3.0m)
16.40'(5.0m)
22.97'(7.0m)
26.25'(8.0m)
32.81'(10.0m)
Focus Ring
Zoom Lever
Adjusting the Projector Zoom / Focus
You may turn the zoom lever to zoom in or out. To focus the
image, rotate the focus ring until the image is clear. The projec-
tor will focus at distances from 4.9 to 32.8 feet (1.5 to 10.0 meters).
Adjusting Projected Image Size
Screen
(Diagonal)
Screen
Size
Distance
This graph is for user’s reference only.
Installation
Diagonal