This is topic Low Light For Cinema 3D in forum General Yak at 8mm Forum.


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Posted by Maurice Leakey (Member # 916) on August 25, 2013, 02:25 AM:
 
I have just been watching James Cameron talking on BBC television and he thinks that all forms of entertainment will eventually be 3D - because "that's how we see the world."

The Hollywood director makes the claim despite 3D movie revenues faltering and consumer indifference to 3D on television.

He also said that some cinemas have insufficient light in their projectors for 3D presentation.

This latter comment I can verify. A couple of years ago I visited a projection room to see the newly installed NEC digital projectors. The Chief was complaining that the projectors should have had 3kW lamps but Management insisted on the fitting of 2kW because "they were cheaper". As the Chief said, 2kW was OK for 2D but their 3D films were suffering.

A further comment from the TV programme was that cinema-goers often preferred to see 2D versions of a 3D film.
 
Posted by Vidar Olavesen (Member # 3354) on August 25, 2013, 02:32 AM:
 
I personally do like the 3D effect of videos like The Priest ... It's got awesome depth, but not in the traditional stuff flying at the screen, but overall when the desk is in front of something, it has a real nice depth feel to it. The 3D in you face is not what makes it nice. But it's more straining than 2D
 
Posted by David Ollerearnshaw (Member # 3296) on August 25, 2013, 03:55 AM:
 
The BBC have announced that they are to stop making 3D programmes.

If you really think about watching 3D on TV to me it does not look real, we might see in 3D but on TV 2D is OK for me.

After saying that they are are couple of films I would like to see in 3D. One is "House Of Wax" "Dial M For Murder" plus a few others all from older 3D craze.

James Cameron is not looking forward that much, what about holographic projection as in "Star Trek"

Last night I watched "The Sting" 2D DVD really enjoy this film I rented it from Rank Film Library full length excellent print. Would it have been better in 3D no way. If the film-makers do their job correctly your imagination takes over adding to your viewing.

If videmas are showing too dark an image, complain ask for a refund. They may get the message.
 
Posted by Martin Jones (Member # 1163) on August 25, 2013, 05:22 AM:
 
Vidar,
Strictly speaking, 3D should NORMALLY only show action taking place further away than a "window" which is effectively the plane of the screen. Anything that approaches the viewer closer than that should be restricted to something (such as an arm) that is wholly within the field of view and NOT cut off in any way by the screen edges. As long as those rules are followed great 3D can be achieved.
BUT, there is another rule that can ONLY be followed (for movies) if the presentation is on a large screen...
The "Left" and "Right" images of an object at "infinity" MUST, by definition, be placed 65mm (approx) on the viewing screen surface to appear to be at infinity to the viewer. Anything closer than this will have the images closer together, varying as to how close the depicted object is. So, each auditorium will require a slightly different set-up depending on screen size, throw and how the images are projected.
In fact, back in the 50s these factors were taken into account when setting up camera separation and convergence while actually filming, a typical optimum screen size and theatre layout being assumed: there were special calculators manufactured for the purpose.The distance at which convergence was set defines the "window" (plane of the viewing screen).
3D in TV can never therefore give a true representation... a "foreshortened" version of the spacial content of the original is the result. I understand that the cameras used by SKY for football presentations actually have their lens separations wider than human eyes to enhance the appearance of depth: an example of taking a "typical" screen into account when actually filming.
 
Posted by Hugh Thompson Scott (Member # 2922) on August 25, 2013, 06:39 AM:
 
Like all gimmicks, the public soon tire of them and look for the
next "innovation". We are speaking in the main, of people who
spend half their lives on mobile phones, and watch films on them.
Give the public what the want, and they no longer want it.As for
low light projection, didn't they change the opt lighting to laser
for their 35mm sound some years back, that caused a bit
of consternation with the projectionists. Perhaps Graham could
shed more light, pardon the pun.
 
Posted by Maurice Leakey (Member # 916) on August 25, 2013, 07:12 AM:
 
To eliminate silver content for 35mm sound tracks, cyan (blue) tracks were introduced. In order to play these the exciter lamps had to be changed to red LED units.

The new red lamps were able to reproduce any older silver tracks (black & white) satisfactorily, and were, of course, OK for cyan tracks as and when such a print arrived in the cinema.
 
Posted by Joe Taffis (Member # 4) on August 25, 2013, 08:30 AM:
 
David, Warner Home Video is releasing the original Vincent Price House of Wax in 3-D Blu-Ray here in October....
 
Posted by Guy Taylor, Jr. (Member # 786) on August 25, 2013, 09:25 AM:
 
Dial M for Murder is currently available in 3D Blu Ray.
 
Posted by Martin Jones (Member # 1163) on August 25, 2013, 10:58 AM:
 
And in the UK... Dial M now and House of Wax later. Check Amazon UK

[ August 25, 2013, 01:27 PM: Message edited by: Martin Jones ]
 
Posted by Graham Ritchie (Member # 559) on August 26, 2013, 03:00 AM:
 
I have been very impressed with digital 3D cinema presentation of "Hugo" and "The Life of PI" both those movies were really made for 3D.

Many cinema owners like to spend as little money as possible, and this is where things start to fall apart, simply put, "you get what you pay for". Its really down to the owners and not the fault of the projectors.

When I started projecting at the cinema 1999 they already had converted to reverse scanning Infrared Light Emitting Diode {IR/LED} plus two out the three screens "Dolby Digital", later the remaining screen was fitted out with DTS...around 2003.
 -
Its interesting to note that this "Digital Reader" only use a General Electric EPT 10.8 volt 42 watt reflector type lamp. They had a 8000 to 10000 hour lamp life, however I used to change them after 12 months use.
 -
reverse scanning IR/LED..on the old Bauer projector.

We had a great run with this sound system...very reliable.

Graham.
 
Posted by Desmond Godwin (Member # 2530) on August 28, 2013, 06:57 PM:
 
quote:
Dial M for Murder is currently available in 3D Blu Ray
The story goes that Hitchcock had no faith in 3D and described it as a 9 day wonder. He hated using the massive sized 3D camera. When the film was released in 3D the punters complained about the discomfort, etc in having to wear the 3D glasses. The studios took the complaints serious enough and ended up only releasing the film in 2D. I agreed with Hitch on the 9 day wonder! Tho i havent seen the 3D version (and i won't be going to the Video theatres to see it) the 2D is a classic!
 


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