Does Xperia S support HDR? As the title says, does anyone know if Xperia S supports the HDR feature?


  HDR stands for High Dynamic Range. It usually refers to the method of capturing images having “greater dynamic range between the lightest and darkest areas of an image than current standard digital imaging methods or photographic methods” (Wikipedia).
HDR has not to be enabled on the device. It is a software feature, combining multiple photos (see: Bracketing) into one. So you will need a camera app supporting this.

AFAIK the stock camera shipping with Android 4.2+ does so, plenty more are available on Google Play (not necessarily requiring Android 4.2+, most will run on your device). See e.g. Camera HDR Studio or HDR Camera for apps explicitly dedicated to this feature, or Camera FV-5 for an all-round-camera having this feature "amongst others". More to find out there.

A helpful article to read on the topic: How to use HDR on your Android device.