"GATHER THE ROSES WHILE YE MAY,
OLD TIME IS STILL A-FLYING."
ALEX. KEIGHLEY.
For a whole-plate camera, a useful battery would be a 5 inches, 7½ inches, 9 inches and 12 inches; for 10 × 8, 7 inches, 9 inches, 10½ inches and 14 inches. The three last in each case are the most useful.
Having selected the lenses, another very important point and one not to be decided hastily is the question of levels. Four are required, two circular and two ordinary. They are placed as follows: Fix the circular levels, one on the baseboard near the front of the camera, the other on the top of the back part of camera. The other two should be placed one on the side of the back part and the other on the back of camera just under the reversing back. Care must be taken to purchase slow moving levels as some work so quickly that it is next to impossible to level the camera with them, and as this is one of the most important points in the whole business, too much care cannot be taken in selecting and fixing the right kind of level.
The focussing screen should be ruled as accompanying diagram. This will divide the screen into inch squares, working from the centre, and will considerably assist the photographer in "sizing his subject up."