The Moving picture world (November 1922-December 1922)

882 MOVING PICTURE iVORLD December 30, 12 which is the successor to, or outcome of the old Kineinacolor process. Among Those Present Among those present were : Will C. Smith, U. T. E. ; W. H. Rabell, Independent Movie Supply Company; Fred Stoffregen, Capitol Theatre; Joe Basson, H. Mackler, who many hope and believe will be the next President of Local Union 306; "Al" Polin, "Jimmie" Daisy, for years identified with union matters in New York City and known as the "Wild Irishman" of Gotham; S. Goldfarb, M. Fernberg, W. Guth, Harry Sherman, M. Rottiner, E. Klinowski, J. Lafauti, L. Coco, Joe Abrams, J. Goldhammer, Harry Williams, Gus Durkin, E. Hoffman, Jas. E. Soons, Joe Krulish, Herbert Griffin, friend MacGuire, advertising manager N. Power Company ; C. Long Cobb, Art Color Process; James Lava, Superior Machine Company and oodles of others whose names I was unable to make note of, as I was myself reasonably busy all through the evening. Some Party Some party, my boy, if you ask me — SOME considerable party. I might add that such gatherings as these accomplish much good. They bring the men together in a sociable way and permit an exchange of ideas; also they serve to strengthen the morale of the entire projection force. In my opinion it would mean many thousands of dollars a year added box office revenue, and other thousands in lessened operating expenses if such corporations as the Marcus Loew obliged their projectionists and theatre managers to all meet in one of the theatres, say once every three months, offering something fairly substantial in the way of first and second prizes for ideas submitted at these meetings which are found of value to the company in improving either projection or other results. I would also like to suggest that inasmuch as men like Marcus Loew have a direct and enormously large money interest involved in what these men do or do not do, it would be a mighty good financial investment to lend encouragement to them by recognizing such a gathering as this, either by personal attendance, by direct representation or in some other way. Viewed purely as an investment I cannot imagine anything of equal cost in time or effort which would be likely to return even one-tenth the probable interest. Lens Data O. H. Butler, Projectionist Majestic Theatre, Centerville, Iowa, asks me to autograph the new handbook he ordered. Concerning the handbook he says : Have been the owner and student of both the second and third editions, which have been o( so much help that I am afraid words cannot express it. As to the lens chart, for which the price Is inclosed, why I should have had it long ago. Referring back to an earlier issue of projection department, I therein asked about my lens combination and you re(|uested further information, viz.: Is the distance. I gave from condenser to film from face of conversing lens or from center of combination, and what is exact horizontal diameter of crater, which is 5-lG inch. Distance is 19 inches center of combination to film. Many thinks for reply to my former letter. Followed Instructions Later, under date of Nov. 16, brother Butler says : Did as you said and got two 6.5 piano convex lenses. With the aid of lens chart and chart on pages 196-197 of handbook and your letter I have been experimenting. Am not done yet. as I think I can still better things. Here is present line-up, which is a wonderful improvement «s against what I originally had. Want your criticism and to have you point my errors, if any. Use mercury arc rectifier. 30 ampere capacity. Use 28 amperes. Carbons % positive cored and % inch solid negative, set as per "C," figure 120B, page 407 of new handbook. Crater distance to lens 2.5 Inches. Cannot get it any closer. Two 6.5 piano convex lenses spaced % inch apart. Distance center of condenser combination to film 18.75 inches, which is as much as I can get. Projection lens 4.5 inch E.F., and 1% diameter. Working distance 3.5 inches. Crater diameter Vi inch. Lions stopped down to little less than Va. its diameter. Find aerial image to be 10'/i( inches from aperture. It is 1 inch wide by % high. It is at end of shutter shaft. By reversing shutter on shaft I can just reach It. At this position I am able to use a three-blade 50-50 shutter. Now where can I Improve? We project a fourteen-foot picture at nlnety-slx feet. What Griffith Says After doping this out for myself I checked by sending it to brother Griffith, who says: Seems to me, Butler has got about as near as he can get with the small lens he has. He needs a larger diameter projection lens, though with the small amperage he uses there will be but little current waste. I don't quite understand what he means by the lens being stopped down to a little less than ',4 Its diameter, but presume he must refer to the condenser, which he has topped down to get the entire line beam into his projection lens. The small lens diameter wil cause him to advance his crater a bit ahead of its normal position. I am afraid the collector lens will break if he gets any closer to It. And there you are, brother Butler. I, too, could not quite make out what all that lens stoppage meant. Certainly, unless you had a heavy projection angle and was obliged to stop down to increase depth of focus, there could be no reason for stopping an already too small lens, and it hardly seemed possible that it would require all that stop to get the entire beam into the lens, though perhaps it does. If so, then certainly you do need a larger projection lens. I'll just lay your system out on paper and see what is what. Should have done it in the first place. There ! Take a rubber at the diagra and learn that it does not pay to guess tii much. I was surprised to find that it real is necessary to stop down your condtns as indicated by the broken lines (the di gram is not precisely accurate, but appro: imately correct) in order to get the enti^ light beam into your lens. What you n is a lens of not less than two inch diamet*' and that is what you must have to work the best possible advantage. At Last A projectionist in Pro.idence, R. I., write Have at last decided to write the il ment, of which I am one of many coii;-ti readers. Am using two Simplex motor driven pi jectors which I like fine. Current is 110 vi 60 cycle, taken through a Ft. Wayne A.C, A.C. Compensarc, set at 60 amperes. W; is the voltage at the arc? Project a nine foot picture at 52 feet. Ajil of projection Is horizontal. Films come pretty good condition, except that they moi ly have holes punched and bits of paper st: on them near ends of reels. Pretty rot work, that, I think. Attached find two sa pies of film. They are from a new print For change-over I use a slide carrier each projector, with a piece of tin In one sli of each. They are connected by means ot string, so that opening one closes the ot It makes a fine dissolving effect. It this published, kindly omit name. Why So Bashful? Why so bashful? Let your light shul forth. Your slide carrier scheme is notti'' good one. It will give the desired effi but if you will examine figure 42A, page of your new handbook, you will see w an expensive way it is of doing the trick. The film samples you sent show carele; ness on the part of the studio inspecti It is a fault he is paid to catch and cut oi I heartily agree that the punch marks ai paper stickers show very punkly rot work on the part of whoever did it The voltage of your arc should be abi 35, though it may be more or less, accordii to how you handle it. ot r ■ Give Full Data Trenton, New Jers DIAGRAM ILLUSTRATING MR. BUTLER'S PROBLEM Showing lens used at present and what the actual conditions require A projectionist asks: | How may I obtain your latest lens ch| pertaining to condensers and covering ■ perage up to 125. Also how obtain a projl tion lens chart including sizes up to 200 tt It is not "sizes" but focal length for d tances up to two hundred feet. But anyM Trenton could not have an answer to 1 question because there is at present no %\i chart available. By this I mean there is : chart of that sort for general distributi< I have such a one, yes, but the aver man would have about as much chance applying it intelligently as I would have writing the language of ancient Rome c rectly. We are trying to get the thing into usable shape. Meanwhile two courses open to you. First, if you will look at pai 194 to 202 of the new handbook you find complete directions for figuring it for yourself. Or if you will send infi mation I will give you the dope, no mat what your amperage may be, though w warning that above 125 amperes D. C. are merely wasting current. What you must send is. First, EXACT horizontal diameter of your car crater. Second, the distance of projectii width of picture, working distance and fi diameter of your projection lens. Mind yi I don't want these "on, near or about," EXACT. I would also like to know ti minimum and maximum distance you get from face of converging lens of eol denser from film. i