• Brightness 3,500 ANSI Lumens, high contrast 18,000:1
  • 2nd generation of BrilliantColor™ imaging technology.
  • Advanced energy saving features reduce the cost of operation
  • Short Throw Ratio design, projects 100 inches image from just 1.27 meter away.
  • Advanced Security bar and Kensington lock.

The Optoma CW305STH brings projection flexibility to your classroom, conference room or training room. Its razor sharp short throw projection lens delivers bright, crystal clear WXGA resolution images ranging in size from 59” to 300” diagonal.

Whether your application calls for wall mounted installation or desktop projection, CW305STH will win your audience with its vibrant, color-rich 3,500 lumens bright image and 18,000:1 contrast ratio. With ample connectivity options including HDMI for digital sources, the CW305STH can satisfy your most demanding application needs. Featuring the latest Eco+ technology for ultra-long lamp life and legendary commitment to quality, Optoma ensures your projector with longer lifetime operation.

Short-Throw Lens

With short-throw lens, the projector can easily produce large screen sizes from a short distance. Either Stand alone or wall mounted, the CW305STH eliminates shadows on the screen and allows you to present with ease.

2nd generation of BrilliantColor™ imaging technology

The technology allows the usage of a more advanced image processing algorithm and enables the usage of more colors on the color wheel, than the standard Red, Green, Blue and White segments.

New BrilliantColor™-II technology enables higher brightness levels by boosting mid-tone colors, resulting in more vibrant, precisely accurate colors projected on the screen.

Clear, Focused Images

Lessons in the classroom and presentations in the boardroom demand sharp, flawless images. The CW305STH has the stunning 18,000:1 contrast ratio for pin sharp graphics and crystal-clear text.

To retain image clarity, Optoma projectors are designed with DLP technology preventing degradation over time to give consistent pixel performance.

Environmentally Friendly

The CW305STH incorporates energy saving features to conserve power and extend the lamp life up to 6,000 hours. This includes Eco mode, for reduced power consumption during operation, a sleep timer which when activated will automatically switch off the projector if it is accidentally left on when no longer required and a <0.5W standby mode which will ensure the minimum energy consumption when the projector is not being used.[/vc_column_text][/vc_column][/vc_row][vc_row][vc_column][vc_column_text]

RS232 control

The extensive RS232 command set makes it simple and easy to control the CW305STH with any RS232 control system.

Additional information

Display Technology


Native Resolution



Light Source

Lamp Life

6000 hours (maximun)

Throw Ratio

Zoom Type


I/O Connectors

VGA in x 2 , Audio Input x 1 , HDMI Input x 1 , Audio output x 1, VGA Out x 1, RS-232 control interface x 1, USB ( Mouse control) x 1

Speaker (Watts)


Keystone Correction

Weight (Kg)

Dimensions (W x D x H) (mm)

288 × 245 × 99

Aspect Ratio

Projected image size

69" – 300"

Projection Distance

0.77m to 3.37m

Projection Lens

F=2.8 ; f = 7.51mm



Computer Compatibility

UXGA, SXGA+,SXGA,XGA,SVGA,VGA Compression, VESA standards, PC & Macintosh compatible

Horizontal Scan Rate

15.3 – 91.1kHz

Vertical Scan Rate

24 – 85Hz

Displayable Colors

1073.4 million colors (10 bit)

Noise Level

Power Supply

100–240V, 50–60Hz, auto-switching

Lamp Type




  • CS_CX_CW305STH-01

  • CS_CX_CW305STH-02


  • CW305STH_Data Sheet_ENG 20181101