International photographer (Jan-Dec 1941)

ing ring is put on the lamp so that our owners will get the brightest possible pictures. Our engineers have proved that there is no other way to be sure of maximum illumination. When the lamp is thus pre-aligned, still held rigidly in position in the machine, the well-known B & H tongued ring is brazed to the lamp base in the correct locating position. The tongue on the ring, says the company, guides the lamp to the one and only position in the projector wherein it can place all the light where it belongs — on the screen. Thus, says Bell & Howell, each lamp is a custom job, built for the Filmo Projector into which it will go. "Our lamps are just like any other projection lamps when we get them. However, incoming inspection rejects and sends back all but the best, and then our laboratory goes to work on the lamps we keep." The selected lamp, Bell & Howell continues, is placed in a specially-built aligning and brazing machine, wherein the lamp is lighted. The image of the filament is then projected upon an optical target, and with micrometer screws the lamp is turned, raised, or lowered, until the filament image is accuratey focused on the exact center of the Filmo Projector optical system. B & H states that this adjustment is accurate with .002 inch. But even that isn't the whole story. This GOERZ KINO-HYPAR LENSES I f:2.7 and f:3 I for regular and color • movies of surprising f quality. High chromatic • correction . . . Focal lengths 15mm to 100 mm — can be fitted j in suitable focusing mounts to Amateur and Professional Movie Cameras. GOERZ Reflex FOCUSER — Patented — for 16mm Movie Camera users — voids PARALLAX between finder and lens — provides fullsize ground-glass image magnified 10 times. Adaptable to lenses 3" and up. Also useful as extension tube for shorter focus lenses for close-ups. Extensively used in shooting surgical operations, small animal life, etc. \ I COERZ Parallax-Free FOCUSER \ ( and FIELD FINDER CONTROL ( ) for Filmo 121 and Simplex-Pockette, no more i • off-center pictures, magnifies 4 and 8x. ' For Detailrd Information itl.lr.it I ') It.,,l. IP 111 \ • C. P. Coerz American Optical Co. : 317 East 34th St., New York f American Lens Makers Since 1899 company goes to extremes in the matter of picture brilliance, so, not content with microscopic accuracy in placing the lamp exactly right in the projector, B & H provides a reflector adjustment in the projector, to compensate for variations in individual lamp filament coils! This makes it possible, says Bell & Howell, to interlace the reflected filament images with the filament coils themselves, thus providing better light distribution over the screen area. This extreme attention to picture brilliance is applied to both 8mm. and 16mm. Filmo Projectors. For further information on this or any other detail of projector construction, write the Bell & Hwell Company, 1801 Larchmont Avenue, Chicago, Illinois. TELEVISION (Continued from page 24) plants in the United States owe these opportunities to Mr. DeVry and Dr. De Forest for the fine extensive training they received. When I spoke to Dr. DeForest a short time ago he said, "Never in the history of radio, television, frequency modulation and sound pictures have there been so many opportunities offered to young men for a good commercial training in these fields. New beacon stations are being built, new air routes being developed, tremendous building programs, both marine and aviaiton for commerce and defense. Frequency modulation has spread to 23 states, with 53 stations licensed, and 59 pending." Any young man can be a part of this growth by entering the electronic field and those wishing to secure information may address the author, care International Photographer. Grover Camera Features Mono-Rail Bed The new Grover Camera, now being produced by Burke & James, Inc., of Chicago, is available in the 4x5, 5x7, and 8x10 inch sizes. Its most outstanding feature is its mono-rail bed. This consists of a hexagon shaped rail, upon which are mounted the lens standard, the tripod mounting plate and the camera back. A micromatic friction focusing drive is fitted on both front and rear. The hexagon shape of the rail bed assures perfect alignment of front and back — and eight bearing surfaces or contacts provide perfect slip-proof traction for the friction focusing drive. The tension maintained on these bearing points is of the automatic take-up type — and the tension is adjustable to suit the operator. Operating adjustments on both lens front and camera back include rise and fall, side shift, swing and tilt. The removable lensboard permits instant interchange of lenses. Extreme wide angle or telephoto lenses may be used. The camera back on the 4x5 model is of the revolving type, permanently attached to the body, and light tight in all positions. It may be rotated from horizontal to vertical position instantly. The 5x7 and 8x10 camera have a reversible back. The full size ground glass focusing panel is fitted with a four sided, folding light hood. These cameras which are of all metal construction are fitted with a durable double extension bellows finished in silver grey to match the chrome finish of the metal parts. The 4x5 inch camera sells for only $59.50, 5x7 inch, $69.50 and the 8x10 inch $89.50. Illustrated descriptive literature may be had direct from Burke & James, Inc., 223 W. Madison St., Chicago, Illinois. CORRECTION In our August issue, page 9, lower right hand picture, only part of the eamera crew were mentioned. We repeat the picture with apologies for the oversight. Ineluded in the photograph are Cecil Wright, Warren Lynch, Alfred Smalley, Kddie Fitzgerald, Arthur Edeson, George Bourne, Mike Joyce, Wally Mainardus. 26