Our friend and photographer John Carey of fiftyfootshadows has been the creator of some of our favorite wallpapers over the years.

For the last month or so, he’s been meticulously experimenting with many of these wallpapers, searching for the optimal photo resolution that can take full advantage of iOS 7’s parallax effect and maintain their crispness. He’s taken his findings and assembled a pair of awesome wallpaper packs (one for iPhone, one for iPad).

The packs can be purchased individually for $7 each, or as a combo pack for $10. John has also been nice enough to provide a few free wallpapers at the bottom of the blog post so you can test them out before purchasing. I can attest that they look and work great on both my iPad and iPhone.