CurtPalme.com Home Theater Forum

[bbfarmht]

[km987654]

[donaldk]

As for dark planetariums, the earlier ones running crt's also produced gray claerly lit sky's, those 812s had to be cranked up, for insteance read that 812/seos modulating LCoS panel projector comparison by Matt Brennesholtz from a couple of years ago following that Washington planetarium upgrade, marked difference as image moved from CRT to the digital, guess which had the better blacks...

Let's not forget those blacks from the Carl Zeiss Velvet two chip DLP.

A lot of them also use the Sony 4K DCi units using a special dome lens from Skyskann(?), here in Amsterdam they use two of them for the full dome. These use Xenon lamps, hence the relatively low hours mentioned.

The dome correction already had to be largely done on those SGI renderfarms anyway, so you end up with much smaller energy efficient and more powerfull control hardware. The Digitals have dome lenses, which the CRTs didn't have.

And yes you can converge digital, just like a crt, you need to position the three imagers;-). It is Geometric correction that is no longer done on the imagers, but in the 'video' signal.

Even a low-end set-up like that Canon Dome at ISE looks good as for correction and blending.

Two €50K Sony's plus a lens, under contact like in the CRT days, probably will be cheaper to operate than two handfulls of Barco's each at the same numbers if not more. Those CRT's were also replaced at 3K hours under contract $$$$!!!

A Planetarium is currently trying to sell-off spent 909 split packs for well over €5K each, ahum.

[CasetheCorvetteman]

Ill buy them all for 5 euro each... Hahahaha!!