Full Page Continuous; Landscape Continuous; Two Column; Manual Crop Margins; Autocrop Margins; Single Page Reflow; Zoom Images in Reflow -LRB-?) (wiki.mobileread.com)
Starting off with the Asus ZenFone Zoom camera phone — specifically the «ZX551ML» variant — the update bumps the software version number to 2.26.40.72 (MR3.2) and brings improvements to the camera's Auto Exposure accuracy, Auto Focus speed, and Auto White balance; it increases digital zoom image quality, fixes the NR zoom parameter failure, and fixes a handful of other bugs related to the camera application. (androidheadlines.com)
For that reason, the phone actually uses a digitally zoomed image for «2X» shots in low light. (androidcentral.com)