In Photoshop, there are several ways to convert an image into black & white. For example:
Image > Adjustments > Desaturate;
Image > Adjustments > Hue/Saturationand set the Saturation to
- Adding a completely black layer on top with the
For 1. and 2. the outcome is identical, but 3. yields something different. Which method is the 'right' one to use, if there is any?
Actually, there are even more ways to make an image gray scale, e.g. via the channel mixer or several other methods, explained in this post:
Some of them offer different opportunities of fine tuning, yielding in very different outcomes. So there isn't really a 'right' method.
See those articles for some interesting results: