Showmen's Trade Review (Oct-Dec 1946)
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E-46
SHOWMEN'S TRADE REVIEW, November 9, 1946
File for Reference
Here reproduced by permission is the ''old reliable"^— the Bansch & Lomb table that shows at a glance what lens to use for any length of throw and any desired size of screen image. Keep it on hand. To use the table, select in the top row of figures the one that most nearly corresponds with the distance from lens to screen in your theatre. Then run down the column under it until you find a pair of figures that represent the width and height of the screen image yon want. Trace straight left along that line to the extreme left-hand column, where you will find the equivalent focus needed to enable a lens to give you that size picture at that distance. Order your lenses accordingly.
PROJECTION TABLE
Showing Size of Screen Images at Dif event Distances <. Lenses of Different Focal Length Size of Picture Aperture: 0.825* x 0.600'
E.F. in.
40 ft.
50 ft.
60 ft.
70 ft.
80 ft.
90 ft.
100 ft.
110 ft.
120 ft.
ISO fL
140 ft.
150 ft.
160 ft.
170 ft.
180 ft.
190 ft.
200 ft.
8.00'
16.4 11.9
20.5 14.9
24.6 17.9
28.8 20.9
32.9 23.9
37.0 26.9
41.1
29.9
45.3 32.9
14.6 10.6
18.3 13.3
22.0 IG.O
25.6 18.6
29.2 21.2
32.9 23.9
36.6 26.6
40.2 29.2
43.9 31.9
47.5
84.6
8.50'
13.1
9.6
16.4 11.9
19.7 14.4
23.0 16.8
26.3 19.1
29.6 21.5
32.9 23.9
36.2 26.3
39.5 28.7
42.8 31.1
45.6 33.5
8.75'
12.0 8.7
15.0 10.9
17.9 13.0
20.9 15.2
23.9 17.4
26.9 19.0
29.9 21.8
32.9 23.9
36.0 26.1
39.0 28.3
42.0 30.5
45.0
32.7
48.1 34.9
8.00'
10.9 8.0
13.7 10.0
16.4 11.9
19.2 14.0
22.0 16.0
24.6 17.9
27.4
20.0
30.2 22.0
32.9 23.9
35.7 25.9
38.4 27.9
41.1
29.9
43.9 31.9
46.7 34.0
8.45 •
lO.l 7.3
12.7
9.2
15.2 11.0
17.7 12.8
20.2 14.7
22.8 16.6
25.3 18.4
27.3 20.3
30.4 22.1
32.9 23.9
35.5 25.8
38.0 27.6
40.5 29.5
43.0 31.3
45.6 33.1
3:60'
9.4 6.8
11.7
8.5
14.1 10.3
16.4 11.9
18.8 13.7
21.1 15.4
23.5 17.1
25.9 18.8
28.3 20.5
30.5 22.2
32.9 23.9
35.2 25.5
37.5 27.3
39.9 29.0
42.3 S0.8
44.7 32.5
47.0 34.2
3.75'
10.9 7.9
13.1
9.6
15.3 11.1
17.5 12.8
19.7 14.4
22.0 16.0
24.0 17.6
26.3 19.1
28.6 20.7
30.7 22.3
32.9 23.9
35.2 25.6
37.3 27.2
39.5 28.8
41.7 30.3
43.9 31.9
4.00*
10.2 7.4
12.3 8.9
14.3 10.4
1G.4 11.9
18.5 13.4
20.5 14.9
22.6 16.4
24.6 17.9
26.7 19.4
28.8 20.9
30.8 22.4
32.9 23.9
35.0 25.4
37.0 26.9
39.1 28.4
41.1 29.9
4.85 •
9.7 7.1
11.7 8.5
13.5 9.8
15.5 11.2
17.4 12.7
19.3 14.0
21.2 15.4
23.2 16.8
25.2 18.3
27.1 19.7
29.1 21.1
30.9 22.5
32.9 23.9
34.9 25.3
36.8 26.8
38.8 28.8
4.50*
10.9 8.0
12.8 9.3
14.6 10.6
16.4 11.9
18.3 13.3
20.1 14.6
22.0 16.0
23.7 17.2
25.6 18.6
27.4 20.0
29.2 21.2
31.0 22.6
32.9 23.9
34.8 25.3
36.6 26.6
4.75'
10.4 7.6
12.2 8,9
13.9 10.1
15.7 11.4
17.3 12.6
19.0 13.0
20.7 15.1
22.5 16.4
24.2 17.6
26.0 18.9
27.6 20.1
29.4 21.4
31 1
22.6
32.9 23.9
34.7 25.2
5.00'
11.6 8.4
13.1
9.6
14.9 10.8
16.4 11.9
18.1 13.2
19.7 14.4
21.4 15.6
23.0 16.8
24.6 17.9
26.3 19.1
27.9 20.3
29.6 21.5
31.3 22.8
32.9 23.9
4.25 •
10.9 7.9
12.5 9.1
14.1 10.3
15.7 11.4
17.8 12.5
18.8 13.7
20.3 14.8
21.8 15.9
23.5 17.1
25.1 18.3
26.7 19.4
28.3 20.5
29.8 21.7
31.3 22.8
5.50'
10.5 7.6
12.0 8.7
13.5 9.8
15.0 10.0
16.4 11.9
17.9 13.0
19.4 14.1
20.9 15.2
22.4 16.3
23.9 17.4
25.4 18.5
26.9 19.6
28.4 20.6
29.9 21.8
6.75*
11.3 8.3
12.8 9.3
14.2 10.3
15.7 11 4
17.1 12.4
18.6 13.5
20.0 14.5
21.4 15.6
22.9 16.6
24.3 17.7
25.8 18.7
27.2 19.8
28.6 20.8
6.00"
10.9 8.0
12.3 8.9
13.7 lO.O
15.1 10.9
16.4 11.9
17.8 13.0
19.2 14.0
20.5 14.9
22.0 16.0
23.3 17.0
24.6 17.9
26.0 18.9
27.4 20.0
«.«5'
10.5 7.7
11.9
8.6
13.1 9.5
14.3 10.4
15.9 11.4
17.0 12.4
18.4 13.3
19.7 14.3
21.0 15.3
22.3 16.2
23.6 17.2
25.0 18.1
26.3 Ifl.l
8i60'
11.4 8.3
12.7 9.2
13.9 10.1
15.2 11.0
16.4 11.9
17.7 12.8
18.9 13.7
20.2 14.7
21.5 15.6
22.8 16.6
24.0 17.5
25.3 18.1
6.75'
10.9 7.9
12.2 8.8
13.4 9.8
14.6 10.6
15.9 11.6
17.0 12.4
18.3 13.3
19.5 14.2
20.7 15.1
22.0 16.0
23.2 16.9
24.4 17.8
7.00'
10.5 7.6
11.7
8.5
14.9 9.4
14.1 10.3
15.3 11.1
16.4 11.9
17.5 12.8
18.8 13.7
19.9 14.5
21.1 15.4
22.3 16.2
23.5 17.1
7.50*
10.9 7.9
12.0 8.7
13.1 9.6
14.2 10.3
15.3 11.1
16.4 11.9
17.5 12.8
18.7 13.6
19.7 14.4
20.8 15.2
22.0 16.0
8.00'
10.2 7.4
11.2
8.2
12.3 8.9
13.3 9.7
14.3 10.4
15.4 11.2
16.4 11.9
17. t 12.7
18.5 13.4
19.5 14.2
20.5 14.9
8.50'
10.6 7.6
11.7 8.5
12.6 9.1
13.5 9.8
14.5 10.5
15.5 11.2
16.1 11.9
17.4 12.7
18.4 13.4
19.3 14.0
9.00'
11.0 8.0
11.8 8.6
12.8 9.3
13.7 10.0
14.6 10.6
15.5 11.3
16.4 11.9
17.3 12.6
18.3 13.3
E.F. in.
40 ft.
50 ft.
60 It.
70 fl.
80 ft.
90 ft.
100 fl.
110 ft.
120 ft.
130 ft.
140 ft.
150 ft.
160 ft.
170 ft.
180 ft.
190 ft.
200 ft.
Wide-angle projection, greater magnification, and improved image quality are claimed for this new Super-Snaplite coated projection lens, which has the exceptional rated speed of f 1.9. Product of Kollmorgen Optical Corporation, the new lens is made in focal lengths from 2" through 5" in 54" steps. The aluminum-alloy mounting is one piece, permanently and hermetically sealed so the lens need never be taken apart for cleaning. Virtually perfect flatness of field is claimed, to provide screen images as sharp at the corners as at the center. (#30).
When re-enameling radiators, first go over them vigorously with a wire brush to take off all loose rust and paint. Then wipe them with turpentine or benzine and apply radiator enamel according to directions, remembering that thin coats wiU resist chipping better than thick ones. In selecting the color of enamel to use, choose one slightly lighter in tone than you want it to be, to allow for the minor darkening effect produced when the radiator heats up. The radiator should be cold until the last coat of paint is thoroughly dry. (#31).
SIZES GIVEN ARE TO THE NEAREST TENTH A FOOT
A new blacklight lamp which can be plugged into any 110-volt a.c. outlet is announced by Switzer Brothers. (#31).
TRADE NAME DIRECTORY
{Continued from Page E-45)
Wenzel — (Projectors, Ticket Registers, Rectifiers, Pedestals, Magazines, Replacement Parts, Soundheads, Rewinders, Carbon Savers). Wenzel Projector Co., 2505 S. State St., Chicago 16, N. Y.
Westinghouse — (Incandescent Lamps (Projection), Rectifier Tubes, Exciter Lamps, Photoelectric Cells, Foot and Border Lights, Decorative Lighting, Germicidal Lamps. Lamps — Incandescent and Fluorescent, Spot and Flood Lamps, L'ltra Violet Equipment). Westinghouse Electric Corp., Lamp Division, Bloomfield. N. J.
Wheeler — (Odor Counteractants, Air Diffusers, Air Fresheners, Blowers and Fans). W. H. Wheeler, Inc., 7 E. 47th St., New York 17, N. Y.
Williams — (Screens). Williams Screens Co., 1620 Summit Lake Blvd., Akron, Ohio.
WoUensak — (Lenses, Lens Assemblies). Wollensak Optical Co., Rochester, N. Y.
Wonder Spots— (Spotlights — tOO and 1000 Watt) Best Devices Co., 10516 Western Ave., Cleveland 11. Ohio.
York — (.\ir l)ilVu-.ir<. .\ir Conditioning Equipment, Unit Coolers, 1 )i'buniidiliors. Refrigerating Machinery), York Corp.. York. Pa.
z
Zapon-Keratol — (I'pholstery Materials). Zapon-Keralol Division, .Xtlas Powder Co., Stamford, Conn.