Originally Posted by CINERAMAX
I did explore using Keith in skoll in Miami Beach 2011, but hes fees were 35% more than i had budget for so ended up with Steve Haas instead.
Even the very best of us are imperfect,
the only critique that I give Keith, is that he was insisting on using a double pane glass for the projector porthole to hit NC-5
I suggested there was no need for such extreme low noise floor, he then suggested nc-15 would be more easy to accomplish, that is the proposal that was 35% over budget. LOL So I can imagine the amount of work that went into yours. Quite frankly 22-26 decibel is my average noise floor in the last 4 moons. And never lost sleep over it but I admire the pursuit of excellence in that regard.
There are excellent porthole glasses made today but every single layer you add in front of the lens robs a little the MTF of the Image, some like our German friends and client with Barcos have gone to extreme measures to use no porthole glass.
So if you do not mind me asking how did you guys approach the porthole design? Is it still double pane?
Inquiring minds to see how his approach evolved since 2010....Thanks!
It's so interesting you bring this up Peter. In the beginning, Keith had actually spec'd triple glass for the port! I nixed this for the exact reason you stated. I said, "Can't we accomplish this with 2 panes?" I even floated the idea of no glass in front of the lens, building sound attenuation around the lens.
I decided against this approach because I wanted the flexibility to upgrade my projector without compromising a future pj's position - meaning I might want a dual projector system, etc. So I decided to keep the port - but only 2 panes! I _hated_ the idea of putting _anything_ in front of the lens (the reason I won't use an Isco). But I acquiesced on the port, figuring if I hated what it did to the image, I could just take it out! I, too, didn't see the need for an extreme low noise floor.
With that said, I wasn't prepared for the absolutely _phenomenal_ improvement in how such a low noise floor affects the movie experience. I can't begin to describe what it feels like to be in an NC -1 room (that's NC _minus_ 1)! Art touched on it a little in his first post. "GRAVITY" SPOILER ALERT - George Clooney 'returns' to visit Sandra Bullock by opening the door to the capsule - the movie goes completely silent after a huge crescendo of sound. We showed it in my theater with all 15 seats occupied and when this happened, when the movie goes silent, you could have heard a pin drop. No one took a breath in that room. It was jaw-dropping. That effect was only possible because of what Keith accomplished in my room.
As I said, I was not prepared for this. Now, I can't imagine not having this level of quiet in my room. And, btw, the picture looks gorgeous. I'm a nit picker of the highest order, and not once have I said to myself "Hmmm, there's something I'm missing in picture quality." That said, I'm pretty sure PQ would probably look better without the port, but I gain so much with it in place, I'm never tempted to get rid of it. And, like I said, the image quality is _not_ lacking.
The inner port is slanted, btw...