The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus ED 7-14mm F2.8 PRO and the Tamron 15-30mm f2.8 VC USD for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Tamron 15-30mm f2.8 VC USD is the longer of the two lenses at 145mm. The Olympus ED 7-14mm F2.8 PRO with a length of 106mm, is 39mm shorter. Besides being longer, the Tamron 15-30mm f2.8 VC USD also has a larger diameter of 98mm compared to the Olympus ED 7-14mm F2.8 PRO's 79mm diameter.
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Below you can find a scaled side-by-side image of Olympus ED 7-14mm F2.8 PRO and Tamron 15-30mm f2.8 VC USD to get a better idea of how their sizes compare in real life.
The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Olympus ED 7-14mm F2.8 PRO weighs 534g, which means it is 566g (51%) lighter than the Tamron 15-30mm f2.8 VC USD which has a weight of 1100g.
Lens Mounts
The Olympus ED 7-14mm F2.8 PRO has the Micro Four Thirds lens mount whereas the Tamron 15-30mm f2.8 VC USD has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are OM System OM-1 II, Panasonic G9 II and OM System OM-5 for the Micro Four Thirds Mount and Canon 1D X III, Canon 6D MII and Canon 5D MIV for the Canon EF Mount.
Tamron 15-30mm f2.8 VC USD is also available in Nikon F (FX) and Sony Alpha mounts.
Focal Range
Olympus ED 7-14mm F2.8 PRO has a focal range of 7-14mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
14-28mm when used on a FourThirds format camera.
On the other hand, the Tamron 15-30mm f2.8 VC USD has a focal range of 15-30mm and 2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 24 - 48mm.