Get Olympus 7-14mm f/2.8 PRO at B&H Photo.
As compared to a 35mm DSLR, the Olympus 7-14mm f/2.8 PRO is equivalent to a 14-28mm lens in its field of view and f/5.6 in terms of its depth of field.
See also summary overview of the Olympus 7-14mm f/2.8 PRO.
The 14mm zoom setting is the long end of the range and adds useful context to the performance of the 7mm series and 10mm series.
Olympus 7-14mm f/2.8 PRO Aperture Series @ 14mm: Still Pool of Water Amid Grasses (EM5 II, HiRes Mode)
Presented from f/2.8 through f/5.6 with sizes up to 24.8 megapixels.
Shot with the Olympus E-M5 Mark II utilizing high-res sensor shift mode, specifically the about $1199 Olympus OM-D E-M5 Mark II Limited Edition Titanium.
Still Pool of Water Amid Grasses
f5.6 @ 1/30 sec, ISO 200; 2015-07-25 18:48:02[low-res image for bot]
E-M5MarkII + OLYMPUS M.7-14mm F2.8 @ 29.1mm (14mm)