Page 100 - The Wellington photographic handbook

negative, shown at N. A reflector outside, R, is covered with
white paper and so illuminates the negative evenly. On a support
inside the room is placed the ordinary camera, with its lens pointing
into the room, while at some little distance beyond is fastened a
drawing board B, on which the bromide, B.B., or S.C.P. is fixed.
This it will be seen, is re-photographing, with the whole of
the darkened work-room as the camera.

The bellows of the camera C only serve to block out strong
light from the room, and a focussing cloth or some similar object
must be put at S to make a light-tight joint between the back of
the camera and the board carrying the negative. The focussing
screen of the camera is of course removed, focussing being effected
on a piece of white paper fastened to the easel B.

When such an arrangement is possible it forms a very cheap
and convenient way of making enlargements, and the results will
be found equal to those obtainable with the most expensive outfit.
The only drawback is that it involves darkening a room and that
work can only be done in daylight.
The lens L may be provided with a red glass cap, which is
put on after focussing. This allows the image on the easel B to
be seen clearly enough for the sensitive paper to be adjusted in
the correct position, exposure being made by taking off the cap.

EXPOSURES IN DAYLIGHT ENLARGING.

As daylight is very variable, it will be found a good plan
always to measure with an exposure meter the light falling on
the reflector R, as nearly as possible at the moment of making
the exposure itself. If this is done, and a note is kept of the stop
used and of the negative, it is simple enough to ascertain approxi-
mately what exposure will be needed for any other negative. In
enlarging, as in contact printing, different negatives require
different exposures, according to their density and colour.
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