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1 result for "Focal Point" in Creator.

Found in catalogs (50+)

• Educational Screen 1926-1927 — page 460

  …Hence lens of short focal length are used to give moderately large picture at close range, whi lenses of long focal length are used…

• Educational Screen 1932 — page 13

  …In a later unit, in our study of lenses, we shall measure focal lengths of lenses, and review the relationships between focal lengths, object…

• Educational Screen 1930-1931 — page 418

  …A lens of one inch focal length is usually supplied on 16 mm. cameras. Focal lengths up to six inches are standard equipment and…

• Educational Screen 1922 — page 74

  …Pictures as Focal Points That is, vividness, clearness, and ac- curacy of impressions are terms of relationship ; they depend upon the interest and attention…

• Educational Screen 1957-1958 — page 841

  …Simpson Focal Length Modifier. By sim- ply attaching this auxiliary lens to the front of present 1 6mm projector lenses, the focal length of…

• Educational Screen 1946-1947 — page 359

  …Pointer aperture permits use of pointer with slides . . . Attractively finished, compact, sturdy with clean flowing lines and controls and parts readily accessible . . . the ideal…

• Educational Screen 1926-1927 — page 459

  OPTICS OF THE PROJECTOR 455 Figure 5 Ifcause the source of light, F, is not a point <pex) but a surface of considerable area…

• Educational Screen 1932 — page 82

  …We found that focal length of a lens or combination of lenses determines the size of the image on the screen. Since many teachers…

• Educational Screen 1951,1952,1953 — page 183

  . . one of the focal points in the defense pattern for the nation by JOSEPH T. NERDEN Consultant, Audio-Visual Education Connecticut State Department of…

• Educational Screen 1948-1949 — page 48

  …Nineteen full pages of lenses of every malie and description from one-half inch to 60-inch focal lengths. Cine, commercial, portrait and process…

• Educational Screen 1928-1929 — page 229

  …well as the inclusion of those ideas which we find in point of fact have actually been omitted or conjoined in as- sociative combinations…

• Educational Screen 1944-45 — page 480

  …With these two points in mind, let us examine a telephoto lens, say of three inches focal length. This means that in- stead of…

• Educational Screen 1954,1955,1956 — page 1304

  …Automatic take up reel ond optical magnifying pointer. 3, 5, 7, 9, 11 inch lenses available. STRIP-OMATIC Remote control 35mm film- strip advance…

• Educational Screen 1957-1958 — page 71

  …2", 3", 5" and 7" focal- length lenses available. V-2C • V-22C For 35mm filmstrip single and double frame, vertical and horizontal pictures…

• Educational Screen 1954,1955,1956 — page 1242

  …2", 3", 5" and 7" focal- length lenses available. < V-2C - V-22C - V-25C For 35mm filmstrip single and double frame, vertical and…

• Educational Screen 1957-1958 — page 744

  …2", 3", 5" and 7" focal- length lenses available. WotM hrgeil £'xc&tM/e, MamipuJureri o^ StiM Ptojedoti ^^^ igCT j^Bi ^m» tl" HHaii…

• Educational Screen 1954,1955,1956 — page 1229

  …The focal length of the converter is changed by simply reversing its position. It can alter the focal length of the standard 2- inch…

• Educational Screen 1948-1949 — page 523

  …one teaching jjrocess, it became apparent that these various departments one focal point for all teaching aids Portland's MITI^RIALS Center by AMO…

• Educational Screen 1948-1949 — page 836

  …To accommodate a wide range of pro- jection conditions, three objectives in the following focal lengths and "i" values are available: S" i/3…

• Educational Screen 1942 — page 396

  …CASH wtthORDER 50c Bring Africa, Focal Point In World News to ITour Classroom How? It*s easy! Just rent the 16nim. !-ound film called…

• Educational Screen 1941 — page 140

  …Each projector is equipped with 2-inch f/1.6 lens but a choice of six lenses is available, in focal lengths of 1…

• Educational Screen 1932 — page 161

  …The amplified music can then he distributed to any desired points. Some rooms in which the music reproducer is frequently needed have both input…

• Educational Screen 1941 — page 18

  …The short focal length lenses that are standard for miniature cameras have great depth of field. e. Film for miniature cameras is inexpensive. f…

• Educational Screen 1924-1925 — page 709

  …for your particular purposes, and involve the further point of the ease with which the focal axis of the instrument may be raised and…

• Educational Screen 1922 — page 104

  …A darkened and quiet room, a focal point to which the sense-organ is directed and to which other bodily conditions are ad- justed…

• Educational Screen 1923 — page 319

  …By having all duplicate material passed on before being offered for exchange and through the numerous points of con- tact which such an institution…

• Educational Screen 1940 — page 240

  …The eye cannot see motion but loves it ; it can see but one focal point at a time of any object; it can see…

• Educational Screen 1936 — page 305

  …Is the child's point of view consid- ered? 4. Does it jiresent a challenge to further activity on the part of the pupil…

• Educational Screen 1950 — page 298

  …To classroom and clubroom, "An Island Nation’ brings real life in a focal point of world interest and hope. Educational Screen

• Educational Screen 1934 — page 256

  …These lenses are of one, two, three and four inches in focal length, affording high optical The New Eastman Kodascope

• Educational Screen 1948-1949 — page 905

  …plications since these, rather than the projected picture, can become the focal point of the lesson if they are not liandled inconspicuously. The mechanics…

• Educational Screen 1950 — page 371

  …Green Lake conference time, the International \Workshop continues to be a focal point of the year word to the wise —--------------------- @ An excellent list of…

• Educational Screen 1926-1927 — page 67

  …Picluies are focal points in the psychological approach; but are not substitutes for explanation or the imagination. Chang, H. S.: Teaching Chinese Illiterates to…

• Educational Screen 1954,1955,1956 — page 285

  …5", or 7" focal length projection lenses. Easy to Focus. Precision fit of lens barrel assures smooth, positive pin- point focusing. Simple to Center…

• Educational Screen 1946-1947 — page 908

  …of the world, said : "We anticipate that it will become a focal point for national and international conferences on the art and science of…

• Educational Screen 1948-1949 — page 41

  …1,357 films had been shipped to points throughout the United States by November 24. P The Tip of the Month You have all…

• Educational Screen 1957-1958 — page 359

  …3y I'sing a good microphone rai-ed ten to fifteen feet in the air, the mike can be located at a focal point…

• Educational Screen 1943 — page 205

  June, 1943 Page 201 geographical weights and economic pressures at critical and focal points. It is only possible in these brief statements to give…

• Educational Screen 1951,1952,1953 — page 1055

  …They insist that the teacher should be the focal point of all classroom activities. They are afraid that the sound film will substitute for…

• Educational Screen 1944-45 — page 707

  …The focal point will be the restored cathedral with gracious space around it. Main roads will go around the city. The suburbs will be…

• Educational Screen 1934 — page 84

  …Ventilation and light were two points especially stressed. At the end of these lec- ture periods the children were urged to asked questions and…

• Educational Screen 1934 — page 198

  …Built-in Range Finder—Focal Plane Shutter— Precision Lenses—Complete Line of Developing, Printing, Enlarging, and Projecting Equipment for Minia- ture Pictures. Buy a…

• Educational Screen 1930-1931 — page 421

  March, 1951 99 A section entitled "Pointers for Projectionists" is sure to be of great usefulness. Included in this sec- tion is a valuable…

• Educational Screen 1926-1927 — page 915

  …The focal plane shutter ' works at one-ninetieth of a second, which, with j a lens of F 4.5 aperture, gives a good…

• Educational Screen 1938 — page 14

  …and intimate contacts of the pupil and ex- pands from these focal points to the broader and more complicated outside world. When the child…

• Business Screen 1939 Vol 1 — page 371

  …Standard 2-inrh focal length FI.65 objective lens. Interchangeable with 1-ineh to 4-inch -.landard It-nses . . Motor and belt drive. Centralized…

• Business Screen 1939 Vol 1 — page 179

  …Bausch & Lomb condensers and f3.5 four inch focal length lens. It has spherical reflector and efficient conver- sion cooling, with adjustable image tilt…

• Educational Screen 1934 — page 27

  …She knows just how much that particular group can grasp and knows when and where to stress certain funda- mental points within the scope…

• Educational Screen 1948-1949 — page 342

  …New compact design has several new features including accommodations for lenses from 3" to 12" focal lengths, interchange- able lamps from 300 to lOOO…

• Educational Screen 1933 — page 288

  …be a manger, large enough in proportion to provide the real focal point. Light it with either a soft blue spotlight swinging from above…