Apparatus Architectural Photography
Apparatus. The materials used in producing photographs, such as lens, camera, stand, slides, etc., which will be severally described under their various headings.
Aqua Fortis. See Nitric Acid.
Aqua Regia. See Nitro-Hydrochloric Acid.
Aquatint, Photographic. See Gum Bichromate.
Arabic Gum. See Gum Arabic.
Architectural Photography. Specialisation in photographic work will often repay an amateur far more than the mere taking of anything and everything that he may come across, and which looks pretty. Architectural photography, if taken up as a special study, will well repay any one ; but it is first necessary, to do this intelligently, that he should have some knowledge of the various styles of architecture. Good books upon this subject are the reprint of articles from The Amateur Photographer by the Rev. T. Perkins, price 3s. 6d. (see Bibliography), and "An Introduction to Gothic Architecture," by J. H. Parker, price 5s. For this particular branch of our art a square bellows camera is required. This form is preferable to the conical as being somewhat more rigid, and there being no chance of the bellows cutting off any portion of the subject. The size of the camera will of course depend entirely upon individual tastes. The lenses must be doublets, and at least three should be obtained - a short-focus, embracing an angle of at least 750; a medium-angle, about the same focal length as the base of the plate, and a longer focus, which should be half as long again as the base line of plate. All should fit the same flange, tor adapters should be obtained. Possibly the most convenient sets of lenses will be found in the so-called " Casket Lenses," which consist of various combinations of varying foci, which screw into a tube forming doublets of the ordinary type varying in focus from very short to long. A plumb and level must be attached to the camera, and the camera back must swing from the centre. The stand should be firm and solid, and the tips of the legs should be provided with cork bungs or indiarubber pads to prevent slipping on stone or marble floors. Equipped as above it will be possible to undertake almost every