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Optoma EH512 - Optoma EH512 1080P WUXGA Support Business Projector with HighBrightness 5000 Lumens, LAN Display, PC-Free Projection, Vertical Lens Shift, Keystone Correction, 1.6X Zoom
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Centering and Lens Shift: How to Center On-Axis Projection and Why it May or May Not be Best. – Projection Screen Resource
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