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Topic: 250Watt HTI GS1200 Lamp Conversion
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Adrian Winchester
Film God
Posts: 2941
From: Croydon, London, UK
Registered: Aug 2004
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posted May 12, 2011 08:32 PM
Whatever grounds you have for saying the Xenon lamp is as bright (and you are clearly driven to making the point as emphatically as possible), you cannot alter the evidence in favour of John's HTI that us BFCC regulars have seen with our own eyes. Year after year, I would see the Xenon image on that enormous screen and although impressive, I'd have to concede that it was a bit dim. Then, with the HTI, it suddenly wasn't dim - it was the sort of brightness you would want when projecting on your home screen. You may feel that this was some sort of mass delusion, but if it was, I'm grateful that it has continued to happen at every BFCC since!
[ May 13, 2011, 04:06 AM: Message edited by: Adrian Winchester ]
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Adrian Winchester
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Claus Harding
Phenomenal Film Handler
Posts: 1149
From: Washington DC
Registered: Oct 2006
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posted May 13, 2011 01:32 PM
All of this comes down to the same old question: what are your requirements vs. how much do you want to pay for it?
If you want/need the absolute brightest Super-8 image, then it's HTI, regardless of the cost of the bulb or length of life of same. Footcandles are footcandles. The life of the bulb is a separate isssue.
If you want a very bright Super-8 image (up to a certain screen size) then the Xenon option is both bright and with a better "dollar versus hours" ratio. You get more "life" for your money, at the cost of lower lumens.
I have the standard GS-1200 on my 9-foot screen; it looks decent and the bulbs are about $35 for a 50-some hr lifespan. Compared to a Xenon, this is not 'economical' nor is it enormously bright.
The cost of the 350W Xenon bulb for my 16mm Eiki is about $350 all told, but then again, it is rated at around 1500 hours, so cost-effective, as long as you don't abuse it with hot strikes and such.
An HTI would be screaming at my throw of 22 feet, and would be massive overkill. It could be fun, but not at the cost involved.
Physics don't lie. And you get what you pay for ![[Smile]](smile.gif)
Claus.
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"Why are there shots of deserts in a scene that's supposed to take place in Belgium during the winter?" (Review of 'Battle of the Bulge'.)
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Adrian Winchester
Film God
Posts: 2941
From: Croydon, London, UK
Registered: Aug 2004
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posted May 16, 2011 07:40 PM
With respect, that's crazy! A Xenon GS obviously has much higher light output than a standard GS and is generally much more expensive to buy. The idea of converting one to a HTI would be therefore be absurd and I'd imagine there might also be complications in terms of the electronic circuitry.
A Xenon owner has no need of a boost to the light output. Even if one found they needed to regularly project onto a massive BFCC-style screen, it would make far more sense to buy a standard GS for conversion, selling the Xenon for a higher price if necessary, than it would to convert a Xenon.
As for your point that you think the Xenon's superiority is: "backed-up by the 1000's of Elmo GS 1200 user's out there that have the Xenon model", I can't believe you're being serious!
[ May 16, 2011, 10:12 PM: Message edited by: Adrian Winchester ]
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Adrian Winchester
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Maurizio Di Cintio
Jedi Master Film Handler
Posts: 977
From: Ortona, Italy
Registered: Jan 2004
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posted January 13, 2013 03:05 AM
Interesting thread, folks!
But the Elmo Xenon, which I am so much satisfied an owner (having being tuned by one of the most clever specialists for this machine in the world), is not just reputable for its light output: it's remarkable for being a genuine workhorse with an incredibly sturdy mechanic, made of superior quality steels; I'd like to know how the Beaulieu HTI compares in this respect, having heard its shutter cam is made of plastic. Can it withstand long hours of functioning with such a high temperature light source? These questions are critical IMHO, because the 708 carries 2,400' arms so it is expected to perform for twice longer than the Elmo, possibly without interruption; does it have or may this have any impact on the machine? Reasonably how long can you wait before having to replace the cam?
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Maurizio
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