The lens that many working photographers consider an essential part of their kit, regardless of the system they use, is the 24-70mm constant aperture zoom (full frame equivalent). It is an especially useful range for events such as weddings or conferences where you are dealing with moving subjects, tight spaces and varied compositions, from wide-angle shots of the location to close-ups of attendees and specific details. Though these zooms don’t deliver the same sharpness or brightness as high-quality prime lenses, they are useful for fast-paced events where changing lenses isn’t practical.
As of today, there are two mid-range constant aperture zooms for Micro Four Thirds. The Panasonic Lumix 12-35mm has been around since mid-2012, while the M.Zuiko 12-40mm made its appearance in late 2013 when the OM-D E-M1 was launched. Both feature a constant aperture of 2.8, meaning that they can be used even in difficult light conditions.
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