Originally Posted by damnsam77
I fully agree with Kamus! I really think Shutter Glasses is the superior solution, considering that 240hz glasses/projectors, and bigger lumens are provided on the upcoming 3D active projectors
Well, just so we're clear, i don't consider Infitec inferior to Shutter.
The fact is, when all is said and done all techs work just fine.
But if we're gonna get technical, here's some fun facts:
Active: >100:1 (your average shutter glasses)
Passive linear: >250:1 (very angle dependent)
Passive Circular: >100:1 (this is what real D uses)
Infitec: >1000:1 (Dolby 3d uses infitec, but with even higher quality narrowband filters I've read)
So, most of these techs aren't very angle dependent except for linear polarized. That said, people that i know have polarized setups prefer it over circular because of it's higher ext. ratio (less ghosting)
As you can see, Infitec filters offer the best ext ratio of all the techs, which should translate to less crosstalk.
Now, i'm a bit skeptical on the Active ext ratio, this probably varies from brand to brand in shutters.
Only polarized filters (both circular and linear) require a silver screen.
Here's the prices on the glasses:
Infitec: $100 to $400
Dolby 3d: $27 (they don't charge nearly as much for the "licensing" since they do wholesale, but as you can see they're still pretty expensive due to the high price of the filters)
Circular / Linear polarized glasses: 25 cents and up. 25 cents would be wholesale cheap cardboard glasses, much like the anaglyph ones. Nice and big plastic glasses are about a buck each though, and you can pay a lot more if you buy branded (but better looking) glasses.
Shutter: $40 and up, with quality shutter glasses being anywhere from $100 bucks and up, and quality does vary a lot in shutter glasses in different price ranges, at least for now.
Again, all of these methods yield very good quality 3d, although on paper a properly color corrected Infitec setup should have the less crosstalk and is a good compromise in price if you plan on buying lots of glasses (as oposed to spending a lot on shutter ones) if you plan on using a white screen.
All of these methods have their share of light loss, and i'm sure that different brands of shutter glasses will yield different results in this regard.
Also, it's worth noting that if you use Stereopol filters you will have the least amount of light loss, and preserve up to 65% of the original light output. (this is much higher than other methods, regular polarizers are about 40% efficient)
These are pretty expensive compared to regular polarized filters though. They're available for both circular and linear polarized configurations.
Also, i'm not sure these filters work with all projection technologies, i remember reading some limitations on these on certain techs. But, don't quote me on this, i'd have to read up on this again.
So, for people concerned about the light loss, this is worth looking into if you have a huge screen.