NEC LT157 Installation Data

Also see for LT157 - XGA LCD Projector: User manual Specifications Quick connect guide

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NEC LT157 Installation Data Manual pdf 1 page image

Visual SystemsLT157/158 Installation DataDesktop and Ceiling MountC (tele) = 2.4253H – 2.576 Screen Diagonal = H x 5/4ver 1.5Page 1ContentsProduct Description, Lens Specs, Notes and Formulas Page 1Projection Distances and Screen SizesCeiling Mount Installation Page 2Desktop Setup Page 3Cabinet DimensionsTop, Front and Right Side Page 4Bottom, Back and Left Side Page 5Ceiling Mount Dimensions Page 6Control Codes Page 7Product DescriptionType: 3 panel, 0.9” p-Si TFT w/MLA LCD projector Dimensions: 8.2”(W) x 11.1”(H) x 2.8”(D)Native Resolution: 1024 x 768 (LT158 DVI Model) Weight: 4.9 lbsBrightness: 1500 ANSI Lumens Manual Zoom/Manual FocusLens SpecificationsThrow Ratio: 2.0 - 2.4:1(approx.) Focal Length: 36.5mm – 43.7mmOffset Angle: 8.4 °-8.9 (wide)/7.1 °-7.4°(tele) F/#: 1.7 – 2.1Screen Sizes: 25”-300”Notes For screen sizes not indicated on the projection tables, use the formulas below. If the figures on the tables do not match the results of formulas, use the figures in the table. The ceiling must be strong enough to support the LCD projector and the installation must be in accordance with any localbuilding codes.• All calculations are based on 4:3 aspect ratio.• Distances are in inches, for millimeters multiply by 25.4.• Distances may vary ±5%.FormulasUnits: Inches (for millimeters multiply final number by 25.4)Definitions:H = Horizontal Screen Width (4:3)V = Vertical Screen Height (4:3)B = Vertical distance between lens center and screen centerC = Throw distanceD = Vertical distance between lens center and screen top (screen bottom for desktop application)α = Throw AngleProjection Formulas: Screen Formulas (4:3):B = 0.2984H H = Screen Diagonal x 4/5C (wide) = 2.0215H – 2.630 V = Screen Diagonal x 3/5D = 0.0766Hα (wide) = tan-1 (B/C(wide))α (tele) = tan-1 (B/C(tele))