The new Lumia Camera app was made available for Lumia 830, Lumia 930, Lumia Icon and Lumia 1520 as part of the Lumia Denim update. It included the following new features,
– Faster startup, mode switching and shot-to-shot
– Moment Capture
– Rich Capture
– The latest imaging algorithms for better image quality
– Higher video resolutions (4K, 1440p) on Lumia 930, 1520 and Icon
– Improved design with faster access to the front facing camera, Lumia Selfie, Lumia Refocus and third party lenses
– More manual controls for video capture. Settings like exposure and manual focus can now also be used during video capture
This app was updated to v2015.213.825.1952 today in Windows Phone Store. It seems to be a bug fix update with no new features.
Download it here from Windows Phone Store.