The Hitachi CP-X328W is one of the larger units tested (some of the other offerings were half the size of the Hitachi). It is still less than 3kg in weight and offers more in the way of connectors. It features additional RGB ports, as well as component and composite video.
The CP-X328W had a lot of similarities to the Viewsonic -- they both had a slightly different chassis but everything else seemed to be in the same position.
The Hitachi does have the higher spec however. It's rated at 2000 ANSI lumens, compared to 1500 for the Viewsonic. During testing we set the picture quality to presentation from standard as it was too dull to look at in standard mode. The Hitachi has a great set of adjustments both vertical and horizontal keystone adjustment, blank or shutter type function, and magnification adjustment, just naming some.
The Hitachi performed was somewhere in the middle of the pack in terms of brightness, but we were surprised it was not as bright than the Mitsubishi, which was rated at 1500 ANSI lumens.
Picture quality wasn't too bad; text appeared slightly blurry up close. Contrast was good, especially after we adjusted the projector from standard to presentation mode.
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Interesting and helpful article. I am interested in finding more information on the wireless projectors that use the 802.11b or g. What are folks saying about them. Are they cost effective?