The X100S sees Fujifilm revisiting the concept, but while the external design is essentially unchanged, it's a very different camera inside. It uses a 16.3MP X-Trans CMOS sensor similar to that seen in the interchangeable lens X-Pro1 and X-E1 models, but now with on-chip phase detection promising much-improved autofocus speed. This is supported by a new processor, the 'EXR Processor II', which includes a new 'Lens Modulation Optimizer' function. According to Fujifilm this 'overcomes' lens aberrations such as diffraction and peripheral aberrations, and should give improved image quality at the largest and smallest apertures. The electronic viewfinder has been upgraded to a higher-resolution 2.35M dot display (from 1.44M dot); however this isn't the OLED unit used in the X-E1, but an LCD instead.
Demonstration of the two digital manual focus aids available in the Fujifilm X100S. Focus Peaking, and Digital Split Image. Conventional magnified manual focus is also available (not shown)
Fujifilm X100S review: Making today’s pictures with yesterday’s design - The Verge
Fujifilm X100S Review
Sony Cyber-shot DSC-RX1 Review: Digital Photography Review
Fuji X100S Review
The Fuji X100s Camera Review - The S Stands for Sexy! By Steve Huff
Fujifilm X100S review
review: Fuji X100 camera - photo shoot with a model - Tangents
DON'T Buy A MIRRORLESS Camera - Until You've Seen This! Fujifilm X-100S Full Review!
Fujifilm FinePix X100: Digital Photography Review
Fujifilm GFX 100S Review: Landscape Photography Field Test - Nature TTL