Apple Aperture 2 - Manual (Page 452)

452 Part III Performing Image Adjustments
Working with the Monochrome Mixer Controls
You use the Monochrome Mixer adjustment controls when you want more control over
converting your image from color to black and white than simply desaturating it gives
you. The Monochrome Mixer allows you to adjust tonal relationships and contrast in an
image by adjusting the red, green, and blue channels independently. The effects of a
monochrome adjustment are similar to attaching a color filter to a camera lens and
shooting black-and-white film. In fact, the Monochrome Mixer comes with a set of
presets that simulate shooting black-and-white film through a color filter.
Choosing a Monochrome Mixer Preset
Aperture comes with a set of Monochrome Mixer presets that simulate the effect of
shooting black-and-white film through a color filter, such as a red filter. You can use one of
these presets, or you can apply a preset as a starting point and then fine-tune the color mix.
Before Monochrome Mixer
adjustment After Monochrome Mixer
adjustment (Yellow Filter preset)