Fujifilm says the X100S has fully 70 improvements over the X100, some major (like the sensor), some relatively minor. Here we pick out some of the most important from the list, but in short, it appears that many of the X100's remaining irritations have been addressed. Note though that we haven't seen a working model yet, so don't know how well the camera actually behaves in practice.
The X100S's new sensor and processor add up to improved performance specs compared to the X100. Here's Fujifilm's own comparison between the two:
Improved AF speed: 0.07 sec in good light (10EV), compared to 0.22 sec for X100Quicker startup (0.9 sec vs 2 sec)Faster continuous shooting (6 fps vs 5 fps)Substantially larger buffer, 31 frames vs 10 frames (JPEG Large/Fine)Improved shot-to-shot time in single shot drive mode (0.5 sec vs 0.9 sec)Can immediately switch to playback mode after shooting (no need to wait for file to write to card)Buttons that were unresponsive immediately after shooting are now fixedImage processing options
The X100S gains the 'Pro Neg' film simulation options previously seen on the X-Pro1 and X-E1, which are particularly aimed at giving neutral results for portrait photographers. At the other end of the scale, it also gets a range of special effects 'Advanced filters'.
'Pro Neg Std' and 'Pro Neg Hi' film simulation settingsCustomisable film simulation bracketing8 'Advanced Filter' processing options (Toy Photo, Miniature, Pop Colour, Soft Focus, Dynamic Tone, High Key, Low Key, Partial Colour)Enhanced movie functionality
The X100's video mode was basic to say the least, but the X100S boasts much improved specs. Movies are still a bolt-on to what's fundamentally a stills camera, and accessed as a drive mode (there's no 'red button' in sight here). Note there's still no image stabilization, optical or electronic, so hand-held movies will be jittery.
1080p 60fps Full HD recording, with 24Mbps bitrate (compared to X100's 720p 24fps)Phase-detect AF effective for movie shootingX-Trans colour filter reduces moiré and false colourAF-S focus mode available (only AF-C and MF on X100)Miscellaneous changes14bit RAW outputMax ISO in Auto mode increased to 6400Auto ISO moved to shooting menu (from Set-up)Protective coating on viewfinder window, to keep OVF clear of fingerprintsMinimum shooting distance using OVF reduced to 50cm (from 80cm on X100)Minimum focus in normal shooting reduced to 21cm (from 40cm)Shutter count function (updates every 100 shots, accessed from menu)Battery chamber redesigned to prevent wrong-way-round insertion1:1 aspect ratio added (alongside 3:2 and 16:9)Camera retains (as opposed to resets) all settings after firmware updateEye-Fi card supportImproved support for SD cards used with Apple computersLive histogram adapts to current settings in manual exposure modeStrap lugs are double-plated for increased durability
Via Thomas Menk