Underwriting the update is a complete rewrite of the camera code, which has allowed the team behind the app to make filters 200 times faster than before. You’ll now be able to switch between them after you’ve taken a photo, in “no time at all”. You can see the camera’s new interface in action on Instagram’s website.
The biggest and most important change is a dramatic increase in the size of the images that are captured. Previously, pictures came out at 612 x 612 pixels, but that’s now been increased to 1936 x 1936 on the iPhone 4 and 1536 x 1536 on the iPhone 3GS. Instagram says this this was “by far the most requested feature from pros and amateurs alike”. Via Wired.