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Review Contents
Ease of Use
Intended Use:
Mobile Presentation
Optoma ML300 Projector Optoma ML300
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Street Price: n/a
Weight: 2.0 lbs
Aspect Ratio:16:10
Lens Shift:No
Lamp Life:20,000 Hrs
20,000 (eco)
Warranty:1 year
Connectors:  Composite, VGA In, HDMI, MemoryCard, USB (x2),
Video Formats:  480i, 480p,

Optoma ML300 Pocket Projector

Mark Davidson, July 9, 2012


Low audio volume. The ML300's audio quality is almost irrelevant, because the volume from the 2-watt speaker is too low to hear well from even a few feet away. If you need sound, plan on using an external audio system or headset.

No zoom. As is typical for small projectors, the ML300 doesn't include a zoom control. Given the small size, however, moving the projector to adjust image size is easy, and once you've used it a few times, you'll know approximately how far to put it from the screen for the image size you want. In my tests, I got a 77" diagonal image at just over 8 feet from the screen.

Noise. The ML300's fan noise ranges from reasonably quiet in the least bright mode, to potentially annoying in the brightest mode, at a rated 36 dB. If you're sensitive to noise, you'll probably find it bothersome. And note that even with the fan going full blast, the ML300 gets surprisingly hot to the touch.

3D works with computer output only. The ML300 offers limited 3D support. Optoma says it will work only with computers that have a Quad-buffered, Open GL 3D-compatible graphics card. And to use 3D, you'll have to buy DLP-Link glasses separately.

Scaling artifacts. One image quality issue worth mentioning, although it's less of a problem than with competing projectors, is scaling artifacts. Even with a 1280x800 signal, the ML300 adds unwanted extra patterns to large areas filled with repeating patterns of fine lines or dots. Scaling artifacts like these shouldn't show up when the signal matches the projector's native resolution.

However, these artifacts weren't a surprise because they also appear with every other projector I've tested that uses the same DLP chip. As I've reported in other reviews, Texas Instruments says that the projector doesn't scale the image at 1280x800, but it also says that the issue is likely at least partly due to the chip's architecture. Beyond that, TI has not provided an explanation for the artifacts.

In any case, you are not likely to see these artifacts unless you use patterned fills in your graphics rather than blocks of color. Even better, as demonstrated by the projector's highly readable text at small font sizes, the ML300 avoids the soft focus effect from anti-aliasing that shows on most other projectors built around this chip. For most purposes, the soft focus effect is the more serious problem, and by avoiding it, the ML300 makes the scaling artifacts a minor issue at most.


The ML300 shares the same niche and many of the same advantages as every other recent 300- and 500-lumen projector. A little larger and heavier than pocket projectors, it's still small and light enough to carry without a second thought, but it's enough brighter to give you a significantly bigger usable image for any given level of ambient light.

That said, the ML300 also stands apart. Compared to other 300-lumen models, it's larger and heavier. But it also offers more connection options, including a standard VGA that eliminates the need for an adaptor. Compared with 500-lumen models, it's lighter than most even with its power block, almost as bright, and notably cheaper. Add in the good data image quality, usable video quality, and relatively rainbow-free images, and there's more than enough here to make the ML300 a solid choice for mobile presentation.

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Comments (9) Post a Comment
adrian Posted Jul 27, 2012 5:40 PM PST
hello. i just bought a optoma ml300 and,after 1 hour of working is starting to get hot and shut down working more when in the room is very cold..usually is working like the..or this one got a problem? thank you!
Charles Dowding Posted Jan 16, 2013 1:16 PM PST
Why ony one USB port, which is used by the memory stick, leaving none for the remote controller's USB?
Humberto Reyes Posted Jan 21, 2013 6:29 PM PST
I just bought a optoma ML300 and,after 5 minutes of working is starting to shut down ... Why ? , buyed on January 15 on Best Buy....
RVG Posted Jul 30, 2013 10:04 PM PST
I bought a Optoma ML300 for my Corp- Office , and after 10 - 15 minutes of working, a ( fan+caution ) symbol is coming and projector gets shut down. We're from Kuwait and we purchased from X-Cite by Alghanim Electronics. Then I gave back to their customer service center , they checked and they returned after testing. Still I'm facing the same problem. What should I do?
stop using it Posted Sep 19, 2013 3:12 AM PST
stop using it - put it away!
Vishnu Posted Nov 9, 2013 3:05 AM PST
HI I bought ML300 a week ago. Product has over heating problem and gets switched off after a sign on screen shows that fan is not working. Every time when i switch it on , at least once in 10 minutes the over heating and switching off happens. I can not return this product because I am outside US and bought this while coming from US. Any suggestions how to over come this. Thanks.
EM Cardenas Posted Jan 30, 2014 3:27 PM PST
I bought it one year ago, and since the second month starting getting hot and shutting down, the customer service is terrible, I have returned the item 3 times and I am having a hard time getting another one, I suggest to pay a differente and get another model, but optoma did not accept.

They advertise the product saying that you do not have to replace a bulb like regular projectors, and that is just right, because you have to replace the whole crap of unit.

kozmoz4 Posted Oct 15, 2014 5:07 AM PST
I had the fan problem also. After I sent it back like 5 times they got the problem fixed. Now I am trying to use it with every device I have. How do I connect it to my Android phone? Do I need a micro USB to mini HDMI cable?
Steve Posted May 24, 2015 12:34 PM PST
I am unable to my Optoma ML300 to work with my Surface Pro3 using the USB mini port. I am unable to download drivers when I connect to the USB. Please send me a link to download the drivers.

Overall, I am pleased with the ML300. I have used with my laptop with no issue. It has met all of my mobile presentation needs.

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