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Performance
5
Features
Ease of Use
Value
Intended Use:
Business
Optoma TW865-NL Projector Optoma TW865-NL
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Street Price: n/a
3D: PC 3D Ready
Contrast:4,000:1
Lumens:6000
Weight: 40.3 lbs
Resolution:1280x800
Aspect Ratio:16:10
Technology:DLP
Lens Shift:H + V
Lamp Life:1,500 Hrs
2,000 (eco)
Lamp Cost:n/a
Warranty:3 year
Connectors:  S-Video, Composite, Component, RGB In, VGA In (x2), DVI Digital Input, HDMI, Network, USB (x2), RS232, 12-Volt Trigger
Video Formats:  480i, 480p, 720p, 1080i, 1080p/60

Optoma TW865-NL
WXGA Conference Room Projector

Bill Livolsi, February 14, 2013

Performance

Light output. The TW865 is rated at 6,000 lumens maximum. The brightest mode on our test sample, called Bright, measured 5476 lumens maximum using a fresh lamp at full power. Bright mode has a noticeable green tint, as do most projectors' brightest modes, and is best reserved for those times when you need maximum light output and don't care as much about color fidelity or contrast.

The next mode is Presentation, which is the go-to mode for data presentation on the TW865. Presentation mode has a bluish white balance and measures around 7000K, but that white balance is utterly consistent across the grayscale. Presentation mode measured 3680 lumens.

The two modes that offer the best color accuracy are Movie and sRGB, which clock in at 2961 lumens and 2567 lumens respectively. Both Movie and sRGB modes have near-perfect 6500K grayscale tracking right out of the box with no need for adjustment. They differ in their handling of contrast. Movie mode enhances shadows, while sRGB mode opens up mid-tones by adjusting gamma. Either mode would be excellent for video or photography display.

The TW865 also offers Blackboard mode (4376 lumens) which compensates for color shift when using a blackboard as a screen; Classroom mode (2134 lumens) which, with its lower light output, would be appropriate for use on a whiteboard; and DICOM SIM mode (4362 lumens) which is ideal for medical lectures and document display. The final image mode, 3D, is only available when displaying 3D content, but suffice to say that the TW865 has plenty of lumens to create a satisfying 3D picture.

The "standard" A02 lens, which we used for testing, has a zoom range of 1.25:1. Our maximum light output numbers were obtained with the lens at its widest angle position. Setting the lens to maximum telephoto reduced light output by about 12% in all modes.

If the mode you want to use is too bright, one option is to switch to Eco mode. Eco mode extends lamp life while also lowering light output by 22%, so Bright mode would drop from 5476 lumens to 4271 lumens.

Contrast. As a projector built for use in ambient light, the TW865 does not have deep, dark black levels. In ambient light, black levels are the first casualty, and it is a projector's brightness that creates the impression of contrast. On the other hand, dynamic range becomes especially important as shadow detail can become washed out. The TW865's dynamic range keeps that from happening, and its gamma settings in the brighter modes are tailored to prevent shadows from being lost. And black level, despite the projector's intended purpose, isn't bad. In Movie and sRGB modes, the TW865 can put up a perfectly respectable video image.

Color. The TW865 is capable of producing rich, vibrant color, and its out of the box color is excellent as well. Presentation mode does not lack for color saturation, which is often a problem in business projectors. Movie mode is pre-calibrated to 6500K across the board, as is sRGB. While Bright mode has a noticeable green tint, that green tint helps to boost lumen output, and so it is functioning exactly as intended.

Optoma TW865 RGB levels, Presentation mode, factory defaults

Presentation mode comes in around 7000K by default, which is not unusual. However, if desired, it is easy to bring Presentation mode down to 6500K by making the following adjustments:

Gain
R2
G0
B-11
Bias
R0
G0
B2

Optoma TW865 RGB levels, Presentation mode, calibrated

As a result, Presentation mode loses about 500 lumens and has much better color. Meanwhile, Movie mode already produces 6500K without any adjustment.

Optoma TW865 RGB levels, Movie mode, factory defaults

In installations where multiple projectors are installed across a business's facilities, a projector like the TW865 can reduce costs by eliminating color calibration from the list of things to do. The TW865's accurate factory calibrations can shave hours or entire days of work off of the installation schedule since color does not need to be tweaked. The projector already looks its best straight out of the box.

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Comments (1) Post a Comment
Super Size Screens Posted May 28, 2013 6:46 PM PST
Would this projector work well for outdoor movies on a 30' wide screen with 16:9 ratio? Would I need a more powerful projector? What would you recommend without breaking the bank account? Appreciate your recommendation.

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