Early Work In Photography
A Text-book For Beginners
Forfatter: W. Ethelbert Henry C. E., H. Snowden Ward
År: 1900
Forlag: Dawbarn and Ward, Limited
Sted: London
Udgave: 2
Sider: 103
UDK: IB 77.02/05 Hen
Illustrated with an actual negative and positive, and numerous
explanatory diagrams throughout the text
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How fo Use the Outfit.
65
apparatus into the open-air to learn the use of the swing
back (and other movements), and try his skill at focussing.
Let us first examine the plate-holders, and then adjourn
to the dark-room and load them with sensitive plates.
We advise the student to study the plate holders, and
ascertain just how they are to be opened and closed, before
attempting to handle them by the dim light of the dark-room.
The most generally-used plate holder in England is known
as the " book form "; this is hinged at one end, and the two
sides, when folded together, are fastened with brass clips.
At tlie end--opposite to the hinges—are two pieces which
Fig. 4.—Camera arranged for Fig. ^—Book-form Double D-ARSL
use with Short Focus Lens, 6 5 7 Motrble LareSltae,
extend beyond the end of the holder, sufficiently far to be
grasped between the fingers and thumb. These are the
ends of the shutters whicli protect the plates from light
until we wish to expose them in the camera. The shutters
usually have a clip of some kind attached near to the pro-
jecting ends, whicli prevents them from being accidentally
withdrawn. Let us now find this clip and release it, and
then pull the shutter out as far as it will come ; it cannot be
entirely pulled out from the book form. Now close it again
and test the other side; fasten the shutters again, and undo
the oilier clips so that the holder opens on its hinges, 'f
in id ■ holder is painted a dull blac and 1
a central metal partition which (in the best makes) is also
hinged at one end. In some holders this partition is quite
loose, but such loose pieces are only a thorn in the flesh, and
should be discountenanced.