I think I remember 3 screen changes, first was for the digital installation. That screen was found defective… the part of the screen that was defective was sent to the manufacture for analysis. Then the screen was changed again when the laser was installed.
I've seen a lot of the threading of the IMAX, but i have never seen what happens at the end of a show. I'm delighted you were able to show how that worked when it was still in use. I'm also delighted that you were able to use it right up until retirement! I have questions though. What are the lights that we see flashing as the brain is on screen on the platter, too fast and too slow? How hard was it to switch between the digital projection back to the film projection? How heavy were those suckers anyways, they must have damn near broken the service elevator, lol! Do you know if the museum plans to put any kind of educational materials on the glass covering the outside of the booth? Last time I saw it, it was a boring glass square. Thank you for the fun times and amazing experiences in that theatre!
Hi, The brain lights or take off unit lights are indicators to the operator that the sensors mounted in the film gap of the take off unit are working. As you say red is indicating the drivers are slowing the patter and the green indicates a speed up, all very sensitive and quickly controlling the demand of film feed to the projector.
Thank-you for this video, I still have one of his posters that I must have received from Grandad Ian. I think I may have met him when I was very little and was inspired to paint from his incredible work. Hope your well
If you look at 07:00 to 07:20 you will see I’m winding the film on the take up platter. Once the film is finished, it is ready to play again as the leader is in the centre of the platter where the film plays out.
Hi, that is called a dubber, it was originally designed as a 6 channel audio recorder. The head was changed for play back as a sound source for trailers. It runs magnetic coated 35mm film stock containing 6 channel sound.
I never realised, until recently, that the sound was not on the film. Amazing that a digital sound system can synch with a basic "analogue" film. Can it ever go out of synch? I mean - if there's a film breakage & the repairs & splicing results in losing a few frames, how does it get back in synch?
Hi, yes the entire sound system relies on frame count of the film. If the frames are not replaced after a crash the sound sync will be out. When ever a crash occurs resulting with damaged film, that damage must be accounted for and replaced with generally black frames by counting frame lines or sprockets holes. If the repair is large in terms of frames, this will become noticeable on screen. Depending on the severity, the film may need a replacement real. Replacing with black slugs can be very difficult to get right, a reference frame line near the damage in the film has to be found. As the film runs through the projector, a small electro/mechanical spinning wheel with optical sensors mechanically attached inside the projector sends pulses to the sound system. These pulses represent the frames of the film. So physically the film frame count from start frame to last must be maintained.
IMAX most of the cinemas in the Uk are NOT IMAX, I don’t go to the cinema no more because the grainy IMAX visuals are not sharp enough, to get the clarity of the IMAX experience why are cinema screens so so big, reduce the size of the screens and the clarity of the picture is sharper and pin point Excellent nowadays it’s all grainy,
Help ! Apart from the 70mm film, what was on the smaller spools on that separate machine? The soundtrack ? I thought the soundtrack was down the side of the film ?
Hi, 1570 film doesn’t contain any sound information. The 35 mm film is soundtrack played on what is called a dubber that has been largely phased out. In this video it is primarily being used as soundtrack for previews. All sound for IMAX 1570 is synced through frame count passed to and synced to sound equipment.
This video was absolutely wonderful. When I was young, to be a projectionist was my passion, but my parents wanted me to get "a proper job". . I love this ! Thank you. The nearest I got was running the Film Society at my Uni, showing films every Sunday, Monday & Tuesday every week for 5 years - operating two Elf 16mm projectors.
The sound system upgrade is truly massive, even when only showing a 6-channel mix like Chris Nolan flicks. Seeing Dunkirk in both IMAX 1570 and then IMAX GT Laser...wow! The 1.43:1 GT Laser screening, the sound was freaking huge! Deeper, clearer, better.
Да уж, технологии и здесь шагнули далеко вперёд. Вспоминая как я работал на МЕО-5, сегодня это кажется каменным веком. А здесь, столько разной техники, работающей слаженно. Как во всём этом один спец разбирается!? Уму не постяжимо
Going on about 35156 years ago 🤪, I used to do carbon arc projectors. It seems it was about 20 minutes per roll. The Sound of Music was probably the most reels for one show, that I ever did.
Thank you for the great video! Despite some comments I don't think this is a downgrade. Operational overhead is way too big with the film. But, could analog imax give proper blacks like oled?
They have 4K Duel Laser projector - they’re one of the first IMAXes in the world to get it. The projection quality is quite good and the sound is 12 channel surround sound which is better.
so 4k means it's the same resolution as our TV, watching movies at home the same quality as the theater just a smaller screen. 15 perf 70mm still the best, the pixels on 4k are too big to capture all the detail of IMAX film.
