TIME EXPOSITRES INDOORS.
First put the camera in position. The diagram shows the proper position for the camera. It should not be pointed direEtly at a window as the glare of light will blur the pidure. If all the windows cannot be avoided, pull down the shades of such as come within the range of the camera.
To make a time exposure, place the camera on some firm support, like a table or tripod, focus carefully (this, of course, does not apply to fixed focus cameras) on the principal objeEt and locate the image in the finder.
When using plates, or cameras having a removable roll holder, the focusing may be done on the ground glass if desired. The plate or roll holder being removed and the shutter opened, the image may be seen (reversed) upon the ground glass. Cover the head with a focusing cloth of some opaque material and look on the ground glass, not through it. Focus by moving the lens back and forward until the piEture is sharp. Then close the shutter, insert plate or roll holder and proceed as before described.
If the light is poor the focusing may be done with the largest stop and a smaller one put in position afterward.
Set the shutter and all being in readiness press bulb or lever, as the case may be, to open shutter. Give the proper time (using a watch if more than two seconds) then close the shutter.
The following table is an excellent guide for making interior exposures and is based upon the time needed for exposures with the stop ordinarily used for snap shots in single lens cameras, and with the No. 8 stop in all Rapid Rectilinear lenses. When a smaller stop is used the time must be increased proportionately. Where there are figures, greater softness will
be obtained in the faces by somewhat increasing this time and the Steadman system of light measurement is recommended. See page 39• White walls and more than one window : bright sun outside, 2 seconds ; cloudy bright, 10 seconds ; hazy sun, 5 seconds ; cloudy dull, 20 seconds.
White walls and only one window : bright sun outside, 3 seconds ; cloudy bright, 15 seconds ; hazy sun, S seconds ; cloudy dull, 30 seconds.
Medium colored walls and hangings and more than one window : bright sun outside, 4 seconds ; cloudy bright, 20 seconds ; hazy sun, io seconds ; cloudy dull, 40 seconds.
Medium colored walls and hangings and only one window : bright sun outside, 6 seconds ; cloudy bright, 30 seconds ; hazy sun, 15 seconds ; cloudy dull, 6o seconds.
Dark colored walls and hangings and more than one window : bright sun outside, pp seconds cloudy bright, 40 seconds ; hazy sun, 20 seconds ; cloudy dull, I minute, 20 seconds.
Dark colored walls and hangings and only one window : bright sun outside, 20 seconds ; cloudy bright, So seconds ; hazy sun, 40 seconds ; cloudy dull, 2 minutes, 40 seconds.
The foregoing is calculated for rooms whose windows get the direct light from the sky and for hours from 3 hours after sunrise until 3 hours before sunset.
If earlier or later the time required will be longer.
As a general rule use a medium sized stop for time exposures indoors.