The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus ED 40-150mm F2.8 Pro and the Tamron 14-150mm f3.5-5.8 III 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. Olympus ED 40-150mm F2.8 Pro is the longer of the two lenses at 160mm. The Tamron 14-150mm f3.5-5.8 III with a length of 80mm, is 80mm shorter. Besides being longer, the Olympus ED 40-150mm F2.8 Pro also has a larger diameter of 79mm compared to the Tamron 14-150mm f3.5-5.8 III's 64mm diameter.
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. Tamron 14-150mm f3.5-5.8 III weighs 285g, 62% (475g) lighter than the Olympus ED 40-150mm F2.8 Pro's weight of 760g.
Filter Threads
The Olympus ED 40-150mm F2.8 Pro has a filter size of 72mm whereas the Tamron 14-150mm f3.5-5.8 III has a 52mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Olympus ED 40-150mm F2.8 Pro:
And these are the 52mm filters that we recommend for the Tamron 14-150mm f3.5-5.8 III:
Lens Mounts
Both the Olympus ED 40-150mm F2.8 Pro and the Tamron 14-150mm f3.5-5.8 III has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-1 II, Panasonic G9 II and OM System OM-5.
Focal Range
Olympus ED 40-150mm F2.8 Pro has a focal range of 40-150mm and
3.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
80-300mm when used on a FourThirds format camera.
On the other hand, the Tamron 14-150mm f3.5-5.8 III has a focal range of 14-150mm and 10.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 28-300mm when used on a FourThirds format camera.