Motion Picture Herald (Jul-Aug 1936)

might be available for projection at almost any distance, provided, of course, the picture be not too large. This is especially true where conditions are such that a specular screen can be employed without objectional fadeaway. DETERMINING TYPE OF SCREEN NEEDED dean dresp, projectionist of the Fox theatre in Beatrice, Neb., desires advice as to the type of screen needed in a theatre seating 525 persons, all on one floor. "Distance from rear row of seats to front row is 63 feet, 6 inches; seating space is 48 feet wide; distance of 19 feet, 6 inches from front row of seats to screen, making the total distance from screen to rear seats 83 feet. The projection angle is very slight, the lens ports being almost on a line with the top of the screen. Projection distance is 83 feet. The picture is 16 feet wide. Light source is low-intensity reflector type arcs, now pulling 30 amperes each." Friend Dresp has done something few do — given all the data necessary for a competent reply to his question. Presumably he has the latest Bluebook of Projection. If he will turn to page 154 he will find (Figure 49) that since the width of the seating area is 48 feet, and the distance of the front row from the screen is 19 feet, the end seats of the front row will have approximately a 60° viewing angle to center of screen, and considerably more to its furthest side. Also, a considerable number of seats will have a rather large viewing angle, which demands a screen surface that is highly diffusive. Unless this be provided, there will be fade-away at all seats falling outside a 30° viewing angle, and heavy fade-away if a 40° viewing angle be exceeded. All screen manufacturers are or should be able to supply a screen with such a surface. Screens, their dimensions, location, surfaces, border and surroundings form a very important matter, and on the whole, one that is treated in a disgracefully inadequate manner. A 16-foot picture, under the conditions named, cannot be criticized, but it is true that one 2 feet less in width would serve every necessity, so far as rear seat patrons of normal eyesight are concerned, and would improve matters materially for all patrons seated outside a 30° viewing angle. Not only that, but with suitable alterations in the projector optical systems, it would provide either a considerably brighter picture at the same current, or equal brightness with less current. ONE-MAN ROOMS MAKE JOBS SCARCE william c. brown, projectionist of Sturgis, S. Dak., writes, "As you doubtless know, most theatres here have one-man projection rooms and it is pretty difficult for us single men to get in full time. The married men have the jobs and we singlers must be content with part A TREASURED j—f M a^epulalion By every standard, Strong Arc Lamps have attained a treasured reputation for being the reliable guide to better projection. See a demonstration in your own theatre. Any Independent Theatre Equipment Dealer will, without obligation, demonstrate the lamp meeting your requirements. Write today for the new, interesting and instructive catalog. THE STRONG ELECTRIC CORPORATION 2501 LaGrange St., Toledo, O.. U.S.A. Export Offices: Room 301—220 W. 42nd St.— New York City IransVerteJK For quiet operation and high efficiency in producing uniform current. Sold through The National Theatre Supply Company. Ask for information on The New Universal Transverter THE HERTNER ELECTRIC COMPANY 12690 ELMWOOD AVE., CLEVELAND, OHIO LET'S CO TEXAS ! ! ! Get Your 10i" REFLECTORS Your fellow exhibitor, Mr. Lynn Smith of Gonzales Amusement Company, says : "This is to advise that I have tried your large reflectors for Strong Lamps, and am happy to state they are everything you claim them to be. I have increased my light considerably, and I am more than pleased. "Attached find check in full payment for both reflectors. Thanking you, I am Sincerely yours," Available for Strong, Peerless, Motiograph, Powerlite and Brenkert Low Intensity Lamps Reflectors by The Kneisley Electric Company BAUSCH & LOMB 3852 Watson Avenue Toledo, Ohio July 25, 1936 33