If you've followed all the tips in this chapter thus far, and you've got some nice crisp photos, you can still make your photos look even that much sharper by adding sharpening in either Adobe Photoshop (the software darkroom tool the pros use) or Adobe Photoshop Elements (the semi-pro version). Now, which photos need to be sharpened using Photo-shop? All of them. We sharpen every single photo we shoot using Photoshop's Unsharp Mask filter. Okay, it sounds like something named "unsharp" would make your photos blurry, but it doesn'tthe name is a holdover from traditional darkroom techniques, so don't let that throw you. Using it is easy. Just open your photo in Photoshop, then go under Photoshop's Filter menu, under Sharpen, and choose Unsharp Mask. When the dialog appears, there are three sliders for applying different sharpening parameters, but rather than going through all that technical stuff, I'm going to give you three sets of settings that I've found work wonders.
For people: Amount 150%, Radius 1, Threshold 10
For cityscapes, urban photography, or travel: Amount 65%, Radius 3, Threshold 2
For general everyday use: Amount 85%, Radius 1, Threshold 4