Quotes from the official site:
New X-Trans CMOS III
The first model to feature a newly-developed sensor for outstanding image quality
The newly-developed 24.3MP X-Trans CMOS III APS-C sensor boasts the highest ever pixel count for an X-Series camera. Combined with an XF lens, it delivers images with a perceived resolution far greater than the number of pixels used. In addition, the phase detection pixels have been positioned over a larger area for a faster, more precise phase detection AF performance. High ISO sensitivity performance has also been improved to the point that the whole sensitivity range — up to the maximum ISO 12,800 (Extended output sensitivity up to 51,200) — can now be used with confidence.
The sensor readout speed is now approximately twice as fast, delivering high-speed continuous shooting, precise AF tracking, playback and higher quality movies.
- 1: Microlenses
- 2: X-Trans Color Filter
- 3: L/R Light Interception Filter
- 4: Phase Detection Sensor / Green Filter Pixel
- 5: Photodiode
Image Quality
The FUJIFILM X-Pro2: delivering a new level of X-series photo quality by combining the brand new X-Trans CMOS III sensor and X-Processor Pro engine
Finder
The FUJIFILM X-Pro2 is the only interchangeable lens camera in the world featuring a Hybrid Viewfinder system that incorporates both optical and electric viewfinders.
Focusing
The number of selectable focusing points has been expanded from 49 on previous models to 77 for greater functionality and faster autofocus.
Operability
With key functions located on the right hand side of the camera body, all main controls can be accessed without taking your eye from the viewfinder.
Reliability
Rugged and reliable body that is ready for anything professional users can throw at it.