International projectionist (Jan 1963-June 1965)

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New proposed film standard Continued from page 15 ates the changing of lens in a projector for either 70 or 35mm, only requirement is the addition of the presently used C/S attachment lens tor 35mm print. The width of the 35mm print would be .968" for the picture image; this can be accomplished by elimination of the antiquated optical sound track, also the elimination of the magnetic effects sound track, which is of marginal value in any case. This brings the image width to V-2 the width of a 70mm image and using a squeeze image 2 to 1 ratio. It will expand with C/S attachment to the same width as 70mm. By conforming to same screen ratio it eliminates various ratio screen maskings; a 25% increase in definition; full use of spot from light source and superior sound from all prints. With the elimination of all the outdated, time-consuming, costly processes the path is cleared to simplify and unify all printing; both picture image and sound. Every phase of the OUT OF PRINT MITCHELL MANUAL AVAILABLE! The renowned "Manual for Practical Projection" by Robert A. Mitchell is now out of print, according to an announcement by the bookseller. International Projectionist. Returns from our retail outlets have been consolidated and we now have approximately 40 volumes of the Mitchell Manual available on a first-come-first served basis. These books are in brand new condition, complete with dust jackets; have never been used. This rare publication can be yours for $10 cash or money order. Sorry, no C.O.D. or foreign orders can be accepted at this price. Sheehan Booksellers P.O. Box 6174 Minneapolis, Minn. 55424 industry will benefit, including the most important persons — the patrons. The requirement of parts in the theatre for this change of image ratio and sound, would be (2) magnetic sound heads; (6) sprockets; (2) modified gate assemblies; (2) modified intermittent brackets to accommodate the large sprocket should any exhibitor initially choose to eliminate stereo sound equipment, only a matching transformer with three primary windings to one output, and a pre-amplifier would suffice, and could carry on with the existing monoral amplifier and speakers. Theatres now possessing stereo equipment, their requirements for parts would be less. Th changeover to this proposed standard would be gradual, from the first run down the line to a final run in theatres, covering a period of 18 months to two years; thus it would alleviate a large demand for parts required in theatres at any one time, keeping prices stable. Should any exhibitor find it necessary to change back to the existing ratio the time limit and effort would be of no consequence. Since the advent of CinemaScope in 1953, many theatres should require a change of sprockets and etc. at this date, in any event. The total expenditure to accommodate the new image would be very modest in return for benefits received and updating equipment for future use. It has been stated throughout the industry that 70mm prints outlast the present 35mm print by many dozens of runs. The proposed 35mm print being basically identical, it would be expected to last for increased runs also. Submitted for the benefit of the motion picture industry and to the Society of Motion Picture and Television Engineers for consideration, INTERNATIONAL PROJECTIONIST 1645 Hennepin Ave. Minneapolis 34, Minnesota Enter my subscription for Name Address City D 1 year (12) issues — $3.00 G 2 years (24) issues — $5.00 FOREIGN: Add $1.00 per year Zone State corrections and adaptation for standardization. Sincerely, B. A. NiXON, Eox Cinema, Victoria, B. C, Canada /. G. Comments: Ihe proposed standards suggested by brotner INixon is something that should be given careful consideration by the industry as a whole. this plan would once and for all eliminate the hodge podge that exists in the projection room at this time, such as the changing of lenses, apertures and screen masking. With this the audience would see a full screen picture at all times, with no change of aspect ratio. Also the picture definition or focus would be improved due to the larger film image and the sound would be better due to the extra quality obtained from magnetic recording. As brother Nixon points out, the changes to the projector would be of a minor nature. Ihe writer at this time sees two more slight changes required for the larger film aperture. One is that a larger spot would be needed to cover the larger aperture, which has an increase of 25% in depth. In many cases this may be obtained by moving the lamphouse back a few inches and repositioning the carbons to a new focal point to obtain a greater magnification of the arc crater. I am not at this time prepared to say just how flexible the present arc mirrors are in this respect. I do however doubt if it could be done with the Jet Arc mirrors as they are of special design and do not use the common elliptical curve as do the conventional lamps. Perhaps the manufacturers will comment on this. Also a new prime lens will be required with the present anamorphic since the aperture is 25% oversize in depth and not many theatres could increase the screen dimension to this extent, hence a longer focus prime lens will be a must in most cases. All these of course are only minor details, and would not stand in the way of conversion to the new proposed standard. I heartily endorse brother Nixon's proposals and 1 hope the industry will give it a good hard look, and not just shrug its shoulders as it so often does when suggestions are made for improvements. I would be glad to hear from readers with comments pro and con on this subject, and I know Mr. Nixon has also solicited comments from individuals or organizations. J.GJ. 18 International Projectionist March, 1965