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Optoma HD31UST

Optoma HD31UST Key Features

  • 3400 ANSI Lumens
  • Native Widescreen
  • 1080P 1920*1080 Native Resolution
  • 4000 hour lamp life (typical)
  • 28000:1 Contrast Ratio
  • Ultra Short Throw
  • Native Widescreen
  • Direct Power On
  • PC Free Presentations
  • Horizontal & Vertical Keystone Correction
  • Direct Power Off
  • Display Via USB to PC Connection
  • Mouse Emulation Remote
  • Laser Pointer Remote
  • MHL
  • PIN Code Security
  • Warrantied for 24/7 use
  • 3D Projection Ready
  • Monitor Out
  • Network Control
  • 3.9kg (8.6lb.)
  • Click for Optoma HD31UST Detailed Specifications
No Longer Available
Throw Calculator


Size Range: 179 to 224cm
Lens Vertical
Offset
Minimum
Throw
Maximum
Throw
Foot
Lamberts
Standard Lens 18cm 0.45m 0.45m 175
Click for Throw Calculator

Optoma HD31UST Throw Chart

Optoma HD31UST throw distance chart
How the graph works

Along the horizontal axis is the distance in metres between the front of the projector and the projection screen. Up the vertical axis is the width of the image the projector will produce. We use width rather than diagonal as the width will remain consistent with the throw distance and zoom setting whereas the height and therefore the diagonal will vary depending on the source. For example, if you have a 4:3 aspect ratio projector and use it to watch a 16:9 aspect ratio DVD then the image will be "letterboxed", i.e. the width will remain the same but the height will be reduced.


Projector Throw From Screen Size Table (16:9 aspect ratio, in metres)
Diag.WidthHeightMin. ThrowMax ThrowAreaNits
2.06 1.791.010.450.451.81²598.4
2.11 1.841.040.460.461.91²566.9
2.17 1.891.060.470.472.01²537.8
2.23 1.941.090.490.492.12²510.8
2.28 1.991.120.500.502.23²485.9
2.34 2.041.150.510.512.34²462.7
2.40 2.091.170.520.522.45²441.2
2.45 2.141.200.530.532.57²421.1
2.51 2.191.230.550.552.69²402.4
2.57 2.241.260.560.562.81²384.9

Nits are a measure of the brightness of the final image. Multiply the figure in the Nits column by the gain of your screen to obtain a true figure.

Projector lamps dim over their life spans so make allowances by multiplying the foot nits by 0.75 to get a reasonable average.If you intend to calibrate your projector then this will also affect brightness. For home cinema use in a well darkened roon, about 42-70 Nits is ideal. For office use, aim for at least 175.

Screen Size For Given Throw Table
Throw Min. Width Max. Width
0.45 1.80 1.80
0.45 1.80 1.80
0.47 1.86 1.86
0.48 1.93 1.93
0.50 1.99 1.99
0.51 2.05 2.05
0.53 2.11 2.11
0.54 2.18 2.18