Paul Anderson, an inventor based in Oregon, has created an iPhone accessory called the Daylight Viewfinder, which blocks out stray sunlight and improves your ability to see images on the screen when framing your shots.
The device is made up of two components: an eyepiece attachment and a dedicated camera app. Users first need to launch the app, and then affix the eyepiece attachment to a specific part of the iPhone screen via a suction cup.
The built-in magnifier in the eyepiece enlarges a small 216x162-pixel view of the scene on the iPhone's Retina Display, giving you the equivalent of an electronic viewfinder (EVF).
Made in the U.S., the Daylight Viewfinder is only compatible with the iPhone 4 and 4S, fourth-generation iPod Touch, and new iPad. The dedicated camera app will be available for free on the Apple App Store and the Daylight Viewfinder attachment can be had for a basic $20 pledge on Kickstarter.