I used my image of the Rooftops of Paris as a demonstration image for my new book, The Photographer’s Black and White Handbook. In my book, I use the image to show how to accomplish split-toning via a color range that selection that is converted to a layer mask. Using the layer mask, whatever tone is desired can be applied to the image. With the layer mask inverted, a different tone can be applied to the portions of the image that weren’t toned the first time.
Exposure and processing info: 90mm, 1/320 of a second at f/9 and ISO 200, hand held; processed in ACR and Photoshop; converted to black and white using a Photoshop adjustment; toning added for mid-tones to dark-tones using Nik Silver Efex High Contrast Preset with Cyanotype and to light-tones using Full Dynamic Preset with Sepia (both toning effects at partial opacity).