Panasonic PTL785U Provozní pokyny stáhnout pdf (Strana 67)

ENGLISH-67

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Setting-up dimensions which are not given in the table can be calculated

using the formulas below.

SD (m): Screen size (diagonal)

LW: Projection distance for the wide lens position

LT: Projection distance for the telephoto lens position

Model No. of projection lens Aspect ratio

Methods of calculation of Projection distance (L) Unit: mm

Zoom lens

ET-LE10

(1.3-1.7:1)

4:3

LW = 0.027xSD/0.0254-0.0523

LT = 0.0355xSD/0.0254-0.0509

16:9

LW = 0.0294xSD/0.254-0.0523

LT = 0.0387xSD/0.0254-0.0509

ET-LE20

(2.6-4.2:1)

4:3

LW = 0.0554xSD/0.0254-0.134

LT = 0.0871xSD/0.0254-0.136

16:9

LW = 0.0604xSD/0.254-0.134

LT = 0.0949xSD/0.254-0.136

ET-LE30

(4.0-5.6:1)

4:3

LW = 0.0809xSD/0.0254+0.104

LT = 0.1147xSD/0.0254+0.096

16:9

LW = 0.0881xSD/0.0254+0.104

LT = 0.1250xSD

/0.0254+0.096

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Panasonic PTL785U Provozní pokyny Strana 67