For work abroad where extremes of temperature or excessive variations
have to be contended with, a special tropical camera is supplied by
most of the leading makers. Its well-seasoned hard wood and metal-
bound joints render it suitable for hard wear, and reduce the risk of
leakage through warping or shrinkage. The tripod stand should be of
the so-called threefold variety, with sliding legs which can be
adapted to broken ground. If a loose screw is used for attaching the
camera to the stand, a spare screw should be kept in reserve. It is
important that this stand should be strongly made, and light patterns
subject to undue vibrations in the wind should be discarded. For
photographing small objects in the studio, a small table is more
convenient than a tripod support. If the camera will not sit flat on
the table, a bed can easily be designed for it. Better work will be
done if this is prepared in advance than if an improvised support is
used. As regards the size of the outfit, quarter-plate (3 1/4 x 4 1/4
inches) will usually be found to be large enough for the traveller.
For anything in the nature of studio work in a museum or in connexion
with an excavation a half-plate camera (6 1/2 x 4 3/4 inches) is more
satisfactory. Where a hand camera is preferred it should be one
capable of adjustment of focus, and here again, strength and
simplicity should be looked for.
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