It's no surprise that the iPhone 4 is not only a popular smartphone, but also a well-liked digital camera. The 5-megapixel back camera doesn't have the highest pixel count of all smartphone cameras, and the specifications of that camera don't hold a candle to many of the digital SLRs and point-and-shoot cameras that are on the market. What the iPhone 4 does have going for it is an array of apps that make sharing those photos with the world insanely easy.
The ability to share photos with social networks is why the iPhone 4 is well on the way to being Flickr's most popular camera according to TechCrunch's MG Siegler. Siegler reports that although iPhones as a group had taken the Flickr crown in the past, the iPhone 4 alone is about to pass the Nikon D90 as the most popular camera used by Flickr users.
The inability of point-and-shoot cameras, such as the Canon PowerShot line and DSLRs like the various Canon EOS and Nikon models, to immediately upload photos to services like Flickr, Twitter and Facebook is causing the iPhone 4 to become a popular way to share photos. What's also fascinating is that although Android phones have more market share than the iPhone, no individual model is anywhere close to knocking the iPhone 4 from its lofty popularity perch.
Siegler also notes that the iPad 2 is not being used much as a digital camera, and a look at the Flickr data shows a measly nine users a day uploading photos to the photo service. We won't know what the next iPhone model will have in terms of camera specs, but any improvement is sure to keep the iPhone family atop Flickr's "Most Popular Camera" list for a long time.