Is there different 3D in Cinemas?

Freakbro

Freakbro

Freakbro

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I just assumed that all cinema 3D was the same specification passive polarised light type of 3D, but recently I have been to a couple of different Imaxs and was able to keep their 3D glasses - a little bit posher and more comfortable than the standard cinema ones.

So I took these to the last 3D movie I watched at my local cinema and they didn't work for either of us - everything was still just a double image :confused:

So I had to go and get a couple of the standard ones and they were fine.

I haven't heard anything about different types of 3D in cinemas and I am sure I have used a pair of previous Imax glasses in regular cinema before with no problems, anyone know about this?
 
Imax glasses can only be used whilst watching Imax 3d showings (I'm surprised you were able to keep the glasses we get messages before the film and big tubs to throw them in once the films over)

Normal 3d and 4dx films use the cheap glasses that you can keep and reuse.
 
Glanza said:
Imax glasses can only be used whilst watching Imax 3d showings (I'm surprised you were able to keep the glasses we get messages before the film and big tubs to throw them in once the films over)

Normal 3d and 4dx films use the cheap glasses that you can keep and reuse.
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What Imax do you go to?

The one we go to just hands out new pairs every time and no bins for them (we've got a fairly big collection in the dash of our cars now)
Unless your place is collecting for easy bulk recycling.
 
Dolby 3D: Passive glasses use color filtering of primary colors of light to produce a color-shifted left and right eye image which the eyewear filters out. The technology uses a single projector and a white screen.

RealD: Passive glasses featuring circularly polarized lenses. The images are projected from a single projector onto a silver screen.

IMAX digital: Passive glasses featuring linearly polarized lenses. The images are projected from two projectors onto a silver screen.

IMAX film (large format): Passive glasses featuring linearly polarized lenses. The images are projected from two projectors onto a silver screen.

XPAND: Active-shutter glasses that feature left and right lenses that open and close alternately. The images are projected from a single projector onto a white screen.

RealD is cool because the circular polarisation means the 3D effect isn't affected by being off-centre, so you can still see in 3D from the crap seats at the side.


I'm still waiting to see what Sony were supposedly doing. Rumours are something like their technology alternated colour wavelengths at the projector end so the result could give you 3D *without* needing glasses!!
 
Werewolf said:
What Imax do you go to?

The one we go to just hands out new pairs every time and no bins for them (we've got a fairly big collection in the dash of our cars now)
Unless your place is collecting for easy bulk recycling.
Click to expand...

Cineworld Sheffield. I've taken friends before who've watched Imax at their local and then they are blown away with the size of the screen here.

They reuse the glasses each showing, collected and then handed out again. They are completely different to the standard 3d glasses you buy over the counter.
 
Thanks for the replies - it must be the linear and circular polarisation that was the difference.

And I've been to Imax's that do have bins to put your glasses in and ones that let you keep them.
 
Liquidfox said:
Most glasses dim the brightness which annoys me, that and wearing glasses annoy me. Most of the time I'm gutted when films come out in IMAX only for them to be in 3D only. I'd rather see most in IMAX 2D.
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But those films that have been properly shot for 3D have been done so with very excessive brightness and colour, due to one of the technicalities of filming in 3D in the first place. I'm not the best person to explain how/ehy this is necessary, but it's to do with how one of your eyes naturally has a higher 'brightness setting' than the other - You can discern the difference if you close each eye in turn... and I have a feeling it's the dominant eye that supposedly sees things brighter/richer in colour.

I can ask around, if you're interested?
 
Werewolf said:
What Imax do you go to?

The one we go to just hands out new pairs every time and no bins for them (we've got a fairly big collection in the dash of our cars now)
Unless your place is collecting for easy bulk recycling.
Click to expand...

No they reuse IMAX 3D glasses in all cinemas I think. You've just been stealing them each time:D

The normal 3D glasses you get, you normally keep.
 
bignev72 said:
No they reuse IMAX 3D glasses in all cinemas I think. You've just been stealing them each time:D

The normal 3D glasses you get, you normally keep.
Click to expand...

I've never handed back a pair of 3D glasses after seeing an IMAX film, been to plenty this last year. There are no collection points, and they don't ask for them back. So not stealing ;) This is all at Odeon MK. Had about 6 pairs in my car before getting rid of them.
 
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