This section is from the book "Complete Self-Instructing Library Of Practical Photography", by J. B. Schriever. Also available from Amazon: Complete Self-Instructing Library Of Practical Photography.
Selection Of View Point. To properly photograph a room in which windows are to be admitted into the view, the view point should be selected where the illumination comes from the back, or side of the camera, and not from windows appearing in the view.
LADY AT WINDOW Study No. 5 - See Page 402 Eva Godley Rolfe.
Non-Halation Plate - Ordinary Development. See Paragraph No. 102..
Exposure. With the view point selected, proceed to obtain a sharp focus, stopping down merely enough to give good definition; then expose at least four times longer than would ordinarily be necessary. For example, if 30 seconds exposure would give you full detail in the deepest shadows, using the ordinary method of developing, for this method give four times that amount, or two minutes. Or, if one minute is required for normal exposures, give four minutes for this method. Develop the plate according to instruction for Special Developing given in Chapter XIII (Lesson Vii. Modeling The Forehead. Practice Work) (Lesson Vii. Modeling The Forehead. Practice Work), Volume II. (See Illustration No. 4.)
Give Full Exposure. The success of this class of work depends entirely upon the exposure. The plate must be fully timed. If you are in doubt as to the necessary exposure, time rather on the side of over than underexposure. Such wide latitude is allowable in the development that any reasonable amount of over-exposure can be easily overcome.
Direction Of Light. According to this method, you may select any view point best suited to the view, admitting as many windows as desired. The angle of the sunlight, however, must not be directed towards the camera, but should lead into the view, away from the camera. If directed toward the camera you would be photographing against the shadows, which will give you a smudgy effect. The illumination should fall upon the subject, not upon the camera. The angle of light travels straight ahead and all objects in its path are illuminated. Those back of it are in shadow.
Illuminating Shadows. The shadows should be illuminated through windows outside of the view, which do not supply the principal source of light. Therefore, if a view is to be made from any particular point, see that the light is directed from that point of the view and not toward it.