Conclusion: I think the Optoma PK320 is the greatest little projector around! That’s even though I personally don’t really have a need for a pico projector. I really liked the older PK301, but I love this PK320. OK 100 lumens still isn’t a whole lot, but as I mentioned at the start of this review. 100 lumens (ok, actually 110 lumens) was how the portable projector industry got started.
Pros: Higher resolution than most Picos at SVGA 854×480, Has a microSD card slot for loading presentation slides, photos, videos…, Accepts HDMI, Has a USB port to read files from, 45 measured lumens with internal , 102 lumenswith AC power or external battery pack, AVI, MOV, MP4, 3GP (Common video formats are converted using Optoma Pico Video Encoder*), Has a fairly long battery life of 1.5 hours (low power), LED light source rated at 20,000 hours, 16:9 native aspect ratio a...
Cons: 40 or 100 lumens still isn’t very bright on any average sized projected image – needs a fairly dark room., Battery lasts only 45 minutes or so in brightest (but will last almost twice that long in their “eco” (Standard) mode), Not quite as small as most Pico projectors., More expensive than many other (less bright) Pico projectors, No match for entry level traditional projectors which cost no more (but are huge by comparison).
Excerpt: Its footprint is only slightly larger than an iPhone 5, but the Optoma is blessed with mini-HDMI, micro-USB, micro-SD, composite video and VGA connectors – so it will play nicely with pretty much any device. If you want to travel light, it also features 1GB of onboard storage.