my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Strong X-60B lamphouse for 70mm?

Author Topic: Strong X-60B lamphouse for 70mm? Phillip Grace Expert Film Handler Posts: 164 From: ACMI. Melbourne. Australia. Registered: Mar 2004 posted 06-11-2019 05:02 PM                     Hi all. Does anybody know how to configure a Strong X-60B Lamphouse for 70mm? I'm trying to discover how to adjust the spot size for the 70mm aperture. Is it just a matter of adjusting the lamp focus, or is there supposed to be a change of reflector, or addition of a spreader lens? There are manuals for the C and D models in the warehouse, but unfortunately not the B. (I could also use some new reflectors for 35mm projection). Any advice will be more than welcome. Thanks.  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 06-11-2019 07:44 PM                     The B version is almost identical to the C, the changes are mostly electrical as I recall (B is 220V?). You add a beam expander lens for 70mm in a dual format installation, it is also a UV filter. A metal box thing screwed to the front of the lamphouse to hold either a UV filter plate or the beam expander. For dedicated 70mm use I think you could change the distance to the aperture... and maybe just a lamp position change would suffice. For high power lamps with the metal collector, the UV filter is recommended as without it the film color bleaches out pretty quickly. Probably not an issue (if film was still used) with current releases lasting a week or two but when a movie could play for many weeks, prints would get badly faded. Since presumably you want to show archive prints (what else is there?) you should have a UV filter. Naturally those Strong filters and expanders are NLA, but maybe BLS or someone still has some.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 06-12-2019 10:12 AM                     I actually found i had more light just defocusing the lamp than with the beam spreader  |  IP: Logged Phillip Grace Expert Film Handler Posts: 164 From: ACMI. Melbourne. Australia. Registered: Mar 2004 posted 06-13-2019 08:22 PM                     Thanks Dave and Gordon for your advice. The pair of X-60B's I am using has a housing for a drop-in lens attached to the front of the snood. It does look well made, but probably locally, not OEM. The spreaders, if any, are long gone. The reflectors are glass cold-light type. I'll have a play around with lamp focus and lamphouse position when there is an opportunity. I've be told of a number of situations where defocusing the lamp was the preferred method, even if the spreader lenses were available. Will also investigate a UV filter to protect the film. Fortunately 70mm screenings will be quite some time into the future, not "later today" - the way the 35mm was scheduled. Thanks again for your help.  |  IP: Logged Phillip Grace Expert Film Handler Posts: 164 From: ACMI. Melbourne. Australia. Registered: Mar 2004 posted 06-23-2019 10:31 PM                     Supplementary question. Does anybody know where the vane switches are located in the X-60B? I cant see anything obvious - unlike the 60-C where the vane switch is mounted directly under the exhaust stack.  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.