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TOPIC: IMAX CONVERSION

IMAX CONVERSION 14 Jul 2008 20:10 #29599

  • slapintheface
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Can a former imax screen run 35 mm with new equipment .......i ask because how would you be able get such a large pic out of 35mm.
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Re: IMAX CONVERSION 14 Jul 2008 23:15 #29600

  • trackfood
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masking
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Re: IMAX CONVERSION 15 Jul 2008 00:16 #29601

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is thaat the best you got?
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Re: IMAX CONVERSION 15 Jul 2008 13:20 #29602

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My company ran a couple imax theatres attached to our regular complexes. They never really did any business. They have now been converted to regular auditoriums. However, before that, we would run imax shows during the day for groups, then normal 35mm shows for the evenings. Lots of screen around the image, needed a really sharp, crisply cut apature plate.
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Re: IMAX CONVERSION 15 Jul 2008 13:45 #29603

  • rodeojack
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I know they do this in Seattle, but I haven't seen what they use.

Offhand, I don't think you could use the whole screen. To start with, one reason Imax uses 70mm is because you can shove a lot more light through it. Some of those machines run dual 15kW lamps. You can't do that with 35, so you're probably limited to whatever you can get out of 7kW or so, and the smallest lens you can get and still manage decent light levels.

Still, you ought to be able to manage a decent sized picture. You might get ahold of Schneider's lens calculation software, or the like. That would help you determine what you can get with that throw.
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Re: IMAX CONVERSION 21 Jul 2008 07:36 #29604

  • SamCat
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We have a former GT screen that we converted to 35mm in Brisbane, Australia without any problem.

From a 28 metre wide Imax screen, we made it a 25 metre cinema scope screen and masked around it. The throw from memory was 26.5 metres and I know they used quite a small lens. The focus and light is good. There is a cinema in Blacktown Sydney that has a 28 metre screen on 35mm and it is still acceptable.I would say that is about as far as you would take 35mm though. The heat of the lamphouse and the amount of light on the film is also a problem in this theatre. With our 25 metre screen everything is fine although we also need to water cool the lamphouse.
If you need any other info let me know.

Sam
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