International photographer (Jan-Dec 1937)

PHOTOGRAPHER (Camera— Cont.) NOVEMBER, 1937—15 New Kalart Flash Micromatic Speed Flash allowing an adjustment to "flash-lag" of particular bulbs out this month. The new Kalart Micromatic Speed Flash will be ready for nation-wide distribution this month. The improved Speed Flash has a micrometer adjustment which allows matching of the synchronizer to the characteristic "flashlag" of any popular flashbulb. It is adaptable to practically all cameras fitted with Compur type shutters, as well as the Leica and Contax. The latter take a special fitting costing 75 cents. A special fitting, costing 25 cents, enables Argus camera owners to take pictures at 1/200 second. Voltage carrying capacity of the new Speed Flash is 45 volts, which is sufficient for firing multiple flashbulbs without the use of an auxiliary relay. The complete Kalart Speed Flash outfit consists of battery case, quick-change socket and six-inch chrome reflector. It will sell for $13.50. Accessories available for special requirements include Jumbo Battery case and Kalart Trio head for firing three flashbulbs, a seven-inch reflector, and an extension outlet for firing three lamps at a distance from the camera. Over Correction Allen claims purist viewpoint on so-called over correction is all wrong and tells why. One of the most discussed and least understood things talked of and written about in connection with photography is the subject of over correction. If the sky has been filtered down and the clouds appear white against the sky the purist photographer will yell, "over correction!" To such critics we say, "Get yourself out into the country away from the city haze, lay yourself on your back and look up to the sky to the north. What do you estimate the relative reflective value of photographic light from the blue sky and the white fleecy cloud?" I will guess that it is over 5 to 1, cloud against sky. The relative sensitivity of super panchromatic without filter is even higher. The point is — who can argue over correction of a shot with anyone, but the guy who shot it? How do the critics know what he wanted? If he got what HE wanted, it wasn't over corrected, even if the ding-busted thing is The EINEMATOGBAPHEB'S BOOK of TABLES By Fred Westerberg Copyright, 1937, All rights reserved STANDARD VISIBILITY FUNCTION THE VISIBLE OCTAVE RELATIVE VISIBILITY— INTERNATIONAL STANDARD Wave Length In Millimicrons Relative Visibility Wave Length In Millimicrons Relative Visibility Wave Length In Millimicrons Relative Visibility 380 .00004 510 .503 640 .175 390 .00012 520 .710 650 .107 400 .0004 530 .862 660 .061 410 .0012 540 .954 670 .032 420 .0040 550 .995 680 .017 430 .0116 560 .995 690 .0082 440 .023 570 .952 700 .0041 450 .038 580 .870 710 .0021 460 .060 590 .757 720 .00105 470 .091 600 .631 730 .00052 480 .139 610 .503 740 .00025 490 .208 620 .381 750 .00012 500 .323 630 .265 760 .00006 FILTER FACTORS (Revised from Int. Phot. March, 1937) FILTER FACTORS FOR NORMAL DAYLIGHT EXPOSURES ON STANDARD 35mm. MOTION PICTURE FILMS Filter Used EASTMAN FILM DUPONT FILM ACFA FILM Supersensitive Type 1217 Background Type 1213 Super-X Type 1227 Micropan Type 103 Superior Type 100 Parpan Type 1 16 Finopan Superpan Aero-1 1.25 1.25 2 1.5 1.5 1.5 Aero-2 1.50 1.50 3 2 2 2 K-l 1.25 1.25 2 1.7 1.5 1.5 K-2 1.50 1.50 3 2 2 2 12 2.5 2.5 35 2.2 2.5 2.5 1S-G 3 3 4 2.5 3 3 21 3 3.5 4.5 3 3.5 3.5 23-A 3 4 6 4.5 4 4 25-A 4 5 9 6 6 6 29F 8 10 16 12 12 12 47-C5 6 6 6 5.5 5 5 58B 2 8 7 6 5.5 8 8 N.D. .25 1.8 1.8 1.8 1.8 1.8 1.8 N.D. .50 3.1 3.1 3.1 3.1 3.1 3.1 N.D. .75 5.6 5.6 5.6 5.6 5.6 5.6 N.D. 1.00 10 10 10 10 10 10 3N5 4 4 5 3.5 4 4 5N5 5 5 7 5.5 7 7 Ret. |udd R. P. Cibson-Tyndall, 289 Bv. Stand. )o. March 1931, Page 469 B. S. Sci. Paper No. 475, p. 174; 1923 The above figures have been furnished by the respective film manufacturers and represent average values expressed as far as possible to the nearest whole number. Nov. 1937