Originally Posted by stuart628
can someone give me some positives of this vs lets say a hd33...I am not grasping why I would want a lcos over dlp (and this isnt putting lcos down, I really am just curious) also is crosstalk really that bad on this projector with the sony glasses and the x103's?
There are trade offs between any of the micro display technologies and price range considerations as well.
DLP with even an average lens will throw a sharp image with a perfectly aligned colors because the same pixels are used on the DLP to create each color. So provided there is little chromatic aberration (CA) each color travels the same light path. The disadvantage especially with the lower end DLPs is that they typically have slower color wheels, usually 3x, which makes rainbows easily viewable especially on high contrast images. Some of he pricier units move up 5x CWs which reduces rainbows but some are still sensitive. Also dithering is an issue with DLPs. The pixels that are in the darker portion of the image tend to noticeably bounce between shades of gray.
SXRD, Sony's version of LCOS, is another reflective display type, but instead of relying on one chip for all colors they use a 3-chip design similar to LCD. I think LCOS is capable of single chip designs, but I am guessing their switching speed is limited so it would have the same issues as low speed DLP units. I can't remember but I think it was Philips that had a rear projection single-chip LCOS HDTV a few years ago that used a spinning prism instead of a color wheel, but conceptually it was a similar approach.
All consumer and professional based LCOS units are now 3-chip designs. The primary advantage is no RBE( rainbow effect), wide color spectrum capability and also lower power consumption since it takes less wattage to produce the same amount of lumen output in a 3-chip system vs. a single chip. The disadvantages are the same for any 3-chip system which mainly boils down to panel alignment. It is hard to maintain alignment of the 3 colored subpixels for making one properly colored pixel across the entire image considering that a projection system is essentially lighting a large magnified image. Even with tight tolerances and state of the art manufacturing the end result is usually a unit where the subpixels are out of alignment by the time the edges of the image are reached due to average quality lenses. HT enthusiasts fret over this and become extremely anal retentive about. As long as the image is in relatively good shape in the middle of the image (pixel drift <0.5 pixels) then don't worry about it. Even if it is noticeable within a couple feet of the screen you most likely will not notice it at your viewing position. Also LCOS has tighter pixel density makes it harder to see a defined image of a single pixel. Some think this gives LCOS more of a CRT like image. I like because the image just seems smoother and you can sit closer without getting a sense of the screw for effect.
Back to the HD33 vs the HW30, I don't think its fair to compare them directly. The HD33 was designed to get the budget DLP crowd that wanted 3D. It doesn't have lens shift which is critical for those with tough mounting situations. Sony is still pushing SXRD as a premium over DLP and all of Sony's SXRD units now fall under their premium ES line. I don't know if the HD33 is any good, but I am going to say if it was directly compared to the HW30 that I don't think it would fair very well. If you want a cheap unit to to try out 3D on, then take a chance. If you are replacing an older dedicated home theater projector, then you might want to take a look at the HW30.