Screen Size and Projection Distance

Wide-zoom Lens (AH-45301)F2.5, f=21.2-25.8 mm

NORMAL Mode (4:3)

Picture (Screen) size

 

Projection distance [L]

Distance from the lens center to

 

Distance from the lens

 

the bottom of the image [H]

 

 

 

center to the center of

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the image [W]

Diag. [χ]

Width

Height

Minimum [L1]

Maximum [L2]

Lower [H1]

Upper [H2]

 

 

 

 

250" (635 cm)

508 cm

(200")

381 cm

(150")

7.6 m (25'

0")

9.1 m (30'

0")

–190.5 cm

(–75")

0 cm

(0")

±76.2 cm

(30")

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

200" (508 cm)

406 cm

(160")

305 cm

(120")

6.1 m (20'

0")

7.3 m (24'

0")

–152.4 cm

(–60")

0 cm

(0")

±61.0 cm

(24")

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

150" (381 cm)

305 cm

(120")

229 cm

(90")

4.6 m (15'

0")

5.5 m (18'

0")

–114.3 cm

(–45")

0 cm

(0")

±45.7 cm

(18")

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100" (254 cm)

203 cm

(80")

152 cm

(60")

3.0 m (10'

0")

3.7 m (12'

0")

–76.2 cm

(–30")

0 cm

(0")

±30.5 cm

(12")

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

84" (213 cm)

171 cm

(67")

128 cm

(50")

2.6 m

(8'

5")

3.1 m

(10'

1")

–64.0 cm

(–25 13/64")

0 cm

(0")

±25.6 cm

(10 5/64")

80" (203 cm)

163 cm

(64")

122 cm

(48")

2.4 m

(8'

0")

2.9 m

(9'

7")

–61.0 cm

(–24")

0 cm

(0")

±24.4 cm

(9 19/32")

72" (183 cm)

146 cm

(58")

110 cm

(43")

2.2 m

(7'

2")

2.6 m

(8'

8")

–54.9 cm

(–21 19/32")

0 cm

(0")

±21.9 cm

(8 41/64")

70" (178 cm)

142 cm

(56")

107 cm

(42")

2.1 m

(7'

0")

2.6 m

(8'

5")

–53.3 cm

(–21")

0 cm

(0")

±21.3 cm

(8 13/32")

60" (152 cm)

122 cm

(48")

91 cm

(36")

1.8 m

(6'

0")

2.2 m

(7'

2")

–45.7 cm

(–18")

0 cm

(0")

±18.3 cm

(7 13/64")

χ:

Picture size (diag.) (in/cm)

The formula for picture size and projection distance

L:

Projection distance (m/ft)

[m/cm]

L1:

Minimum projection distance (m/ft)

L1

(m) = 0.03048χ

L2:

Maximum projection distance (m/ft)

L2

(m) = 0.03658χ

H:

Distance from the lens center to the bottom of the image (cm/in)

H1 (cm) = –0.762χ

H1:

Lower distance from the lens center to the bottom of the image (cm/in)

W (cm) = ±0.3048χ

H2:

Upper distance from the lens center to the bottom of the image (cm/in)

[Feet/inches]

W:

Distance from the lens center to the center of the image (cm/in)

L1

(ft) = 0.03048χ / 0.3048

 

 

L2

(ft) = 0.03658χ / 0.3048

 

 

H1 (in) = –0.762χ / 2.54

 

 

W (in) = ±0.3048χ / 2.54

STRETCH Mode (16:9)

 

Picture (Screen) size

 

Projection distance [L]

Distance from the lens center to

Distance from the lens

 

 

the bottom of the image [H]

 

 

 

 

 

 

 

 

 

 

 

 

center to the center of

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Diag. [χ]

Width

Height

Minimum [L1]

Maximum [L2]

Lower [H1]

Upper [H2]

the image [W]

225"

(572 cm)

498 cm

(196")

280 cm

(110")

7.5 m

(24'

6")

9.0 m

(29'

5")

–140.1 cm

(–55 5/32")

46.7 cm

(18 25/64")

±74.7 cm

(29 27/64")

200"

(508 cm)

443 cm

(174")

249 cm

(98")

6.6 m

(21'

9")

8.0 m

(26'

2")

–124.5 cm

(–49 1/32")

41.5 cm

(16 11/32")

±66.4 cm

(26 9/64")

150"

(381 cm)

332 cm

(131")

187 cm

(74")

5.0 m

(16'

4")

6.0 m

(19'

7")

–93.4 cm

(–36 49/64")

31.1 cm

(12 1/4")

±49.8 cm

(19 39/64")

133"

(338 cm)

294 cm

(116")

166 cm

(65")

4.4 m

(14'

6")

5.3 m

(17'

5")

–82.8 cm

(–32 39/64")

27.6 cm

(10 7/8")

±44.2 cm

(17 25/64")

106"

(269 cm)

235 cm

(92")

132 cm

(52")

3.5 m

(11'

7")

4.2 m

(13'10")

–66.0 cm

(–25 63/64")

22.0 cm

(8 21/32")

±35.2 cm

(13 55/64")

100"

(254 cm)

221 cm

(87")

125 cm

(49")

3.3 m

(10'11")

4.0 m

(13'

1")

–62.3 cm

(–24 33/64")

20.8 cm

(8 11/64")

±33.2 cm

(13 5/64")

92"

(234 cm)

204 cm

(80")

115 cm

(45")

3.1 m

(10'

0")

3.7 m

(12'

0")

–57.3 cm

(–22 35/64")

19.1 cm

(7 33/64")

±30.6 cm

(12 1/32")

84"

(213 cm)

186 cm

(73")

105 cm

(41")

2.8 m

(9'

2")

3.3 m

(11'

0")

–52.3 cm

(–20 19/32")

17.4 cm

(6 55/64")

±27.9 cm

(10 63/64")

72"

(183 cm)

159 cm

(63")

90 cm

(35")

2.4 m

(7'10")

2.9 m

(9'

5")

–44.8 cm

(–17 21/32")

14.9 cm

(5 57/64")

±23.9 cm

(9 13/32")

60"

(152 cm)

133 cm

(52")

75 cm

(29")

2.0 m

(6'

6")

2.4 m

(7'10")

–37.4 cm

(–14 45/64")

12.5 cm

(4 29/32")

±19.9 cm

(7 27/32")

χ:

Picture size (diag.) (in/cm)

The formula for picture size and projection distance

L:

Projection distance (m/ft)

[m/cm]

L1:

Minimum projection distance (m/ft)

L1

(m) = 0.03321χ

L2:

Maximum projection distance (m/ft)

L2

(m) = 0.03985χ

H:

Distance from the lens center to the bottom of the image (cm/in)

H1

(cm) = –0.62263χ

H1:

Lower distance from the lens center to the bottom of the image (cm/in)

H2

(cm) = 0.20754χ

H2:

Upper distance from the lens center to the bottom of the image (cm/in)

W (cm) = ±0.33207χ

W:

Distance from the lens center to the center of the image (cm/in)

[Feet/inches]

 

 

L1

(ft) = 0.03321χ / 0.3048

 

 

L2

(ft) = 0.03985χ / 0.3048

 

 

H1

(in) = –0.62263χ / 2.54

 

 

H2

(in) = 0.20754χ / 2.54

 

 

W (in) = ±0.33207χ / 2.54

Note

•Allow a margin of error in the value in the diagrams above.

•When the distance from the lens center to the bottom of the image [H] is a negative number, this indicates that the bottom of the image is below the lens center.

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