The Kodak BULLETIN
Coldest Film &
—or, why color test strips dwell happily in a deep freezer... the leisurely emulsion that slices millimeters into milli-millimeters ... the philosophy of good filters (and why their owners stay young) ... transparencies for the tax assessor ... how to pack a photo lab into a shoe box . . . and a lady who loves her Kodak Chevron Camera
In the color processing laboratory where you have your Kodak Ektachrome Film developed, this may well have happened today :
A man took a small package from a deep freezer and carefully opened it. After checking a piece of cardboard for signs of a red dot, he removed a packet from the box and also a short strip of developed color film. The box went back in the freezer. The man then took the packet to the darkroom where the day’s run of Ektachrome was being processed, opened it, and took out a short strip of undeveloped film which he attached to the film rack. A couple of hours later, the man had two developed strips of Ektachrome, the one that was just run and the one that came already processed. He put them in a densitometer and plotted points on graph paper. Then he returned to the processing room and discussed something technical with the man in charge.
What’s this all about? It’s just a color laboratory using our Kodak Ektachrome Processing Control Strips to make sure the processing operation is right on the button. We make these control strips by accurately exposing Ektachrome Film on sensitometers. Each strip has a series of
color patches, a gray scale, and a portrait, and they’re shipped out undeveloped, 20 to a box. We also send along a precisely developed strip to use as a standard of comparison.
Why the deep freezer? As you know, the latent image on exposed film changes slightly over a period of time. Low temperature holds this change to a mini-
mum. So, we package these precision strips in dry ice and store them in a freezer. We even put a little indicator in the shipping package—it shows red if the temperature has gone above freezing on the way to your Ektachrome photofinisher.
All this is a lot of trouble w'e don’t have to go to. It’s expensive, for the packaging and handling alone cost almost as much as we charge for a box of 20. But we make Kodak Ektachrome Film to the highest possible standards of quality and uniformity, and we want to do everything we can to help the color lab give you the finest possible processing job.
We often speak of the Kodak Chevron Camera as “a man’s camera—for mansize tasks.” Now comes a complaint from a feminine Chevron enthusiast in Greenwood, Miss. She has a Chevron and thinks it’s wonderful. We agree, and have assured her of our devotion to the fairer sex.
The “man’s camera” idea originated because the Chevron is a big, husky 21/A
x 2*4 camera, while most women prefer trim, compact models such as our 35mm Kodak Signet 35 Camera. Both have Kodak Ektar //3.5 Lenses, so each stands at the top of its class. The pictures you make with them will rate “A’s,” too. See your Kodak dealer.
► Summertime is fill-in flash time. You’ll find detailed information on the subject in the Kodak Data Book “Flash Technique.” 50p at your Kodak dealer’s.
The pleasure of filters
Kodak Wratten Filters are scientific instruments. They are also useful photographic tools. And they are devices that give a lift to the spirit.
Sure, you can take good pictures without filters. But the man who scorns filters tends to become a crabbed and narrow soul, addicted to conventional themes and routine subjects. The true filter en-
thusiast is an adventurer, an explorer who daily renews his youth.
The filter connoisseur is a man who wants to know. (He’ll take a color shot with the right filter, for the record; then some with the wrong filters just to see what happens. Often what happens is more interesting pictorially, and he has new effects to brag about. This is one of the things that make photography exciting.)
What are the right filters? For blackand-white shots, start with the Kodak Wratten K2, A, and XI, and go on from there. For color, the Kodak Skylight Filter (for open-shade shots and less “blue haze” in long-range scenics), and a variety of precise filters for Type A (photoflood-balanced) and Type F (photoflash-balanced) color films. Prices, SI.75 up in standard series sizes. There s also an inexpensive group of solid-glass Kodak Pictorial Filters, for general black-and-white picture taking. See your Kodak dealer, build up your filter collection, and maintain your photographic youthfulness.
► Next time someone asks you how to
synchronize an old beat-up camera for flash, do him a good turn. Just point out that for about the price of a good synchronizer, he can have a brand-new Kodak Duaflex Camera with a good color-corrected //8 lens and flash unit. Then he’ll have two outfits . . . and better synch, too, if his old camera is an average antique. Most flash shots are taken in the//16-//8 Duaflex range.
Millimeters, sliced thin
That blunt instrument above is an ordinary pencil point. It’s pointing at a reticle, made on a Kodak High Resolution Plate. This reticle fits into the eyepiece of an optical instrument, and is rather fine as reticles go. But to these special plates of ours, which will resolve more than 1,000 lines per millimeter, it’s as coarse as the scale on a carpenter’s rule.
(To visualize a resolving power of 1,000 lines per millimeter, take the Vi mm period on this sentence and chop it into about 1,000 slices spaced out to make 1mm.)
You notice we say “more than” 1,000 lines per millimeter. Truth is, we have never been able to devise a situation that drives these plates to their limit. It’s too difficult to form and lay down an optical image that fine. The width of each line and space would equal the wavelength of blue light near the limit of human vision !
Kodak High Resolution Plates are of no earthly use to anybody shooting a still life for a salon. They have extreme contrast, and are only about 1/20,000 as fast as Kodak Tri-X Roll Film. We
recommend that for normal use you choose Tri-X (or Kodak Royal Pan or Plus-X) and save yourself a lot of time. But we thought you ought to know that Kodak can make emulsions so high in resolving power that even a Kodak Ektar Lens can’t squeeze all the juice out of them. And with grain so fine you can t even find it under an ordinary microscope.
Quick and timely
► It seemed to us that stereo cameras and viewers are so essential to each other they might as well go in one package. You can now get a handsome Kodak Stereo Outfit, including the Kodak Stereo Camera and Kodaslide Stereo
Viewer I, for S97.25. A splendid gift for yourself, your best girl friend or favorite wife, or your boy or girl in college.
► We heard about a tax assessor in New Jersey who is making a complete file of Kodachrome transparencies covering all the houses in his jurisdiction. It helps make comparisons and analyses (and settles a lot of arguments). Maybe you can use Kodachrome shots of your house to settle arguments with your tax assessor. And we’ll bet color slides can have a use in your business—whatever if may be.
► Now you can get Kodak Ektalure Paper F (glossy) in both single and double weight—and that’s a good thing, too. Here’s a top-quality medium-speed enlarging paper, same basic type as
EASTMAN KODAK COMPANY, Rochester 4, N.Y.
Kodak Opal but twice the speed, in the best surface for maximum detail and subject texture and maximum tonal scale. Tones beautifully; has great response to manipulation and special processing techniques. Get some; you’ll like it. The double weight is best for large prints, especially those to be mounted.
► A shoe box will very nicely hold a vacation film-processing laboratory that lets you process the day’s shooting the same evening. All you need is a Kodacraft Roll Film Tank (S2.95), a 55ó Kodak Darkroom Thermometer, a few 25c Kodak Tri-Chem Packs and you're in business. Add a SI.95 Kodacraft Printing Frame and a SI.95 Rocker Tray Set, and you can make some prints to send back home at the same time. (With a S9.95 Kodak Day-Load Tank, a Kodak Ektachrome Processing Kit, Process E-2, and the S9.35 Kodak Process Thermometer, you can even process your color transparencies on the spot.)
► Dunk a photographic print in a tray of Kodak Print Lacquer and it becomes practically waterproof—you can wash it with soap and water. Nice for prints that get a lot of handling. The lacquer dries almost instantly. Can, 8 oz., 78 cents.
► What’s the basic difference between the new Kodak Retina I lie and lie Cameras? The I lie has an //2 lens, a built-in photoelectric exposure meter, and costs SI85. The lie has an//2.8 lens,
no exposure meter, and costs SI35. They take exactly the same auxiliary units, including the same wide-angle and telephoto lens components. And they’re almost equally beautiful. Seen them yet? If not, it’s high time you did.
► Ultra-speed Kodak Tri-X Film is
now in 20-exposure 35mm magazines, 85 cents. Also in 120, 620, 127, and 828 rolls.
Prices include Federal Tax where applicable and are subject to change without notice.