Many photographers have found a considerable advantage in the Adapter Back for the studio camera over curtain slide holders and the automatic attachment.

The Automatic Cabinet Attachment allows the operator to slide his plate into position for exposing very quickly after the image has been properly focused, but necessarily the curtain slide holders used with this attachment carry but one plate.

The Reversible Adapter Back is in no sense automatic but it permits the photographer to use the ordinary double plate or film holder, and almost every studio has a number of such holders.

It is a convenience to use one type of holder in either studio or view camera but the special advantage to the studio operator is that the same number of view holders will hold twice as many plates as the curtain-slide holders, enabling him to make a greater number of exposures without reloading his holders.

Reversible Adapter Backs for Century Studio Cameras fit an Adapter Frame which, in turn, attaches to the back of the camera.

If you have an 8 x 10 studio camera and wish to equip it with 8 x 10, 6 1/2 x 8 1/2 and 5x 7 Adapter Backs it is only necessary to have one Adapter Frame as the three backs are interchangeable in the one frame.

The price of the Adapter Back includes one plate or film holder.

Reversible Adapter Backs for Century Studio Cameras

11

X

14

-

11

X

14 . .

$19.00

11

X

14

-

8

X

10 . .

15.00

11

X

14

-

6 1/2

X

8 1/2. .

14.50

11

X

14

-

5

X

7 . .

14.00

8

X

10

-

8

X

10 . .

14.00

8

X

10

-

6 1/2

X

8 1/2. .

12.00

8

X

10

-

5

X

7 . .

12.00

Adapter Frames for Fitting

Reversible Adapter Backs to Studio Cameras

11

X

14........

$5.00

8

X

10........

4 00

Above prices are f.o. b. Rochester, N. Y.

When ordering from your dealer, give name and number of camera you wish Adapter Frames to fit.

Film overcomes the halation you see in a plate negative as well as the halation you don't see - halation which nevertheless destroys highlight detail and half-tone gradation.

Use Eastman Portrait Film and get all the quality of your lightings in your negatives.

A COOLING DEVICE

The temperature of your developer is of such vital importance that the difference of ten or fifteen degrees will mean the difference between a good and a bad negative.

In hot weather we become so accustomed to high temperatures that it is difficult to judge when a solution is right for developing.If the temperature of your dark room is 100 and your developer 80 it seems much cooler than it really is and you may think it unnecessary to use a thermometer.

Don't guess - don't take a chance when with so little trouble you can be sure of the temperature and take measures to put it right for developing.

Tap water is usually cool enough for developing except in localities where the heat is unusual in summer. When the tap water is cool enough to reduce the temperature of a tank of developer, a very simple and inexpensive apparatus can be made to use this method of cooling.A tank of galvanized iron is made in which the developing tank can be placed, the principle being the same as the double boiler in which your wife cooks her breakfast cereal. The Eastman Developing Box, which is made of hard rubber, has a collar or lip around the top, and most developing tanks are of similar construction. The cooling tank should be made enough larger than the developing tank to allow a two-inch water space on the four sides and bottom.

Adapter Backs StudioLightMagazine1918 128

FROM AN ARTURA IRIS PRINT

By Chariest Brandenburg New York, N. Y.

Adapter Backs StudioLightMagazine1918 130

FROM AN ARTURA IRIS PRINT

By Charles Brandenburg New York, N. Y.

In constructing this tank, two inches of the sides and ends are crimped or turned over, making the opening in the top two inches smaller all around than the outside of the tank. The opening should be just large enough for the developing tank to drop through to the lip of the tank which should rest on the edges of the opening.

A small tap is placed in one end of the tank at the bottom to which a rubber tube from the tap over your sink can be attached. A hole in the same end but at the top of the tank allows the water to overflow after it has circulated around the inner tank. In building such a cooling tank the metal on top should be folded over to form a double thickness and soldered together firmly so it will stand the weight of the developing tank resting on it.

By trial, developer in a tank at a temperature of 85 has been reduced 20 in half an hour with a small stream of water from the tap. It is readily seen what an advantage such a tank will be in hot weather and how a small amount of ice can be broken up and used with excellent results when the tap water is not, of itself, sufficiently cool.

The great advantage is in applying the cold water to all four sides and the bottom of the tank and in keeping the hot air away from all but the top.

If the construction of such a cooling device has not been made perfectly clear we will be glad to furnish a drawing from which your tinsmith can work.