The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 14-150mm f3.5-5.8 III and the Panasonic 14-140mm F4-5.8 OIS 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. Panasonic 14-140mm F4-5.8 OIS is the longer of the two lenses at 84mm. The Tamron 14-150mm f3.5-5.8 III with a length of 80mm, is 4mm shorter. Besides being longer, the Panasonic 14-140mm F4-5.8 OIS also has a larger diameter of 70mm 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, which means it is 175g (38%) lighter than the Panasonic 14-140mm F4-5.8 OIS which has a weight of 460g.
Below you can find the dimension and weight table of the SuperZoom Lenses in Micro Four Thirds Mount for size comparison purposes.
Superzoom Lenses in Micro Four Thirds Mount for Size Comparison
Filter Threads
The Tamron 14-150mm f3.5-5.8 III has a filter size of 52mm whereas the Panasonic 14-140mm F4-5.8 OIS has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 52mm filters that we recommend you to consider for the Tamron 14-150mm f3.5-5.8 III:
And these are the 62mm filters that we recommend for the Panasonic 14-140mm F4-5.8 OIS:
Lens Mounts
Both the Tamron 14-150mm f3.5-5.8 III and the Panasonic 14-140mm F4-5.8 OIS 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
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.
On the other hand, the Panasonic 14-140mm F4-5.8 OIS has a focal range of 14-140mm and 10.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 28-280mm when used on a FourThirds format camera.