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Author Topic: Ultra 80 light issue Bernie Anderson Jr Master Film Handler Posts: 435 From: Woodbridge, New Jersey Registered: Apr 2000 posted 07-23-2012 11:43 AM                        Yeah, its very strange. It was off, just so slightly, that it made such a difference in the focus. It's like one of those "of course..." moments. Bernie  |  IP: Logged Richard Fowler Film God Posts: 2392 From: Ft. Lauderdale, FL, USA Registered: Jun 2001 posted 07-23-2012 12:34 PM                     I have used some lasers which had a little drift so I had to match them with a "witness" mark on the tube for repeatable reference.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 07-23-2012 05:04 PM                     Lasers are good for finding "centers" but not as good as people think for aligning reflectors. I will generally use a laser to bore-sight the path from lens to rear of reflector...note one has to also ensure that their lens mount is absolutely square to the entire optical path or the laser will literally point you in the wrong direction. Once everything is centered (concentrically), I use the Kinoton alignment projector to set the reflector since now we are actually reflecting the light back using the reflector itself...the results are always spot on, very even, low heat.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 07-24-2012 10:33 AM                     I found that the alignotrons were sometimes off a bit I centred mine in the lathe and then shot it down the lathe bed to a centre in the tailstock and then using a set screw that i put in the side shifted the laser so that it stayed centred on the lathe centre as i moved the tailstock back and forth One issue also is that the actual edge of the hole in the reflector needs to be machined square to the optical axis and some were not Glass reflectors are usually more accurate Also as bernie dicovered the end of the lamp sitting in the yoke must also be centred and that there is variances in some manufacturers  |  IP: Logged Jack Ondracek Film God Posts: 2348 From: Port Orchard, WA, USA Registered: Oct 2002 posted 07-25-2012 11:45 AM                        This isn't necessarily an ad for one company, or a slam against another, but I wasn't all that impressed with the Ultra-80. For one thing, the projectors I put in front of mine all ran hotternhell. Anecdotally, light output seemed about as good as my old X-60 with glass reflector. Several years ago, I replaced my 3 lamps with new ones from Big Sky. These lamps have small, deep, dichroic reflectors that took me some time to get used to... having had the big ones from the X-60. I also bought the front-mounted heat shields. Aside from seeming to be much brighter, I can put a 7kW bulb in them and lay my hands on top of my projectors... just warm to the touch. It's gonna break my heart the most to pull those things out of the booth in a couple of months.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 07-25-2012 12:53 PM                        The X60/Super 80/Ultra 80 are identical since they use the same part number of reflector. Cooling is the major difference. (Old X60 had glass reflectors, which were, at least, cooler.) Louis  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 07-25-2012 01:04 PM                       I vote the X60C as the high water mark in American film lamphouses. Simple, straightforward and pretty well built. They were an extension of the design of the carbon arc Futura's and Excelite's, (sp). I believe these were the last of the glass reflectors for Strong. I used a couple of rebuilt ones in the Dolby screening room back in 1986. They worked well for 70 and 35mm and as mentioned, ran very cool and quiet, unlike the nasty and noisy Chritie lamps of that era. In fact they are still there but not much film being run there these days.  |  IP: Logged Jack Ondracek Film God Posts: 2348 From: Port Orchard, WA, USA Registered: Oct 2002 posted 07-25-2012 04:11 PM                        Well, that would explain a lot. I really did like those glass reflectors. Unfortunately, the lamphouse wore out before the glass did!  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 07-25-2012 09:54 PM                     I used quite a few Ultra-80s over the years...never had a heat issue...honestly. I dealt with the X60B-D series...They were definitely a transitional lamphouse with the "optional" ignite button. What they lacked that the Futura IIs had was having the burner assembly move forward/aft for 35/70 rather than the silly refocousing of the lamp...ruining the geometry of the arc/reflector.  |  IP: Logged Bernie Anderson Jr Master Film Handler Posts: 435 From: Woodbridge, New Jersey Registered: Apr 2000 posted 07-26-2012 01:14 AM                        That's interesting, since my next concern is heat. I'm running 5000w and all I have is a heat filter in it. When I was running 5000w in Xetron Consoles, all I had was air cooled gates and water cooled aperture and the heat was a lot less. I can achieve 16 footlambert if I want, but it would definitely burn up the film. I'm at 11-13 ftl and its still too hot.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 07-26-2012 06:53 AM                        Assuming Century or XL, you will need water at 3k and over. Louis  |  IP: Logged Bernie Anderson Jr Master Film Handler Posts: 435 From: Woodbridge, New Jersey Registered: Apr 2000 posted 07-26-2012 12:06 PM                        Yep, SA's with turrets. I was thinking the same thing.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 07-26-2012 04:16 PM                     The strong X25 was a nice lamphouse in its day as well  |  IP: Logged

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