If you have an iPhone 4 or 4S, your iPhone really should have a case to protect the lens from potential scratches and damage. With the holiday season upon us, adding a really cool case to your holiday wish list is a great way to get a cool case, protect your phone, and help your friends and relatives avoid giving you something yucky as a gift like socks.

We’ll be taking a look at several iPhone 4 cases in the coming days. All of them are great for iPhoneographers in different ways. All of them will add additional functionality to your phone, as well as help protect it. And all would make a great gift!

I got a press release for the Diff iPhone 4/4S case back when it was in pre-production. Its available now and should ship in time for the holidays. File this under cool stuff I want really badly!

I don’t have a Diff case yet, so this isn’t a review. These are just my thoughts as a guy who wants one of these. This looks like one of the cooler iPhone photo cases available and it’s pretty reasonably priced.

The Diff case is really a perfect case for iPhoneographers. In addition to phone protection, it’s got horizontal and vertical tripod mounts. It has an adjustable sun shade, which is great for improving the visibility onscreen for both daylight shooting and helping review what you’ve just shot. The sunshade doubles as a “kickstand” of sorts for tabletop reading and viewing. The carabiner clip and built-in through-hole add the ability to add a strap to your iPhone — functional and a handy feature, especially if you’ve ever damaged an iPhone by letting it slip out of your hands.

Diff is available in 3 colors; Black, Red and Hot Pink.

The Diff is now available for order for only $30 through December 15, 2011 (it shows the 19th on their Facebook page). You can read more about the Diff case and order one here.

Diff is running a special offer on the case now through December 19th if you “Like” the DiffCase Facebook page.