The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic 14-140mm F3.5-5.6 II and the Tamron AF 28-200mm f3.8-5.6 XR for their suitability to various photography scenarios:
Size and Weight Comparison
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. Panasonic 14-140mm F3.5-5.6 II weighs 265g, which means it is 89g (25%) lighter than the Tamron AF 28-200mm f3.8-5.6 XR which has a weight of 354g.
Filter Threads
The Panasonic 14-140mm F3.5-5.6 II has a filter size of 58mm whereas the Tamron AF 28-200mm f3.8-5.6 XR 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 58mm filters that we recommend you to consider for the Panasonic 14-140mm F3.5-5.6 II :
And these are the 62mm filters that we recommend for the Tamron AF 28-200mm f3.8-5.6 XR:
Lens Mounts
The Panasonic 14-140mm F3.5-5.6 II has the Micro Four Thirds lens mount whereas the Tamron AF 28-200mm f3.8-5.6 XR has the Pentax KAF lens mount. Some of the latest released cameras that are compatible with these mounts are OM System OM-3 Astro, OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount and Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Tamron AF 28-200mm f3.8-5.6 XR is also available in Canon EF , Nikon F (FX) and Sony Alpha mounts.
Focal Range
Panasonic 14-140mm F3.5-5.6 II 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.
On the other hand, the Tamron AF 28-200mm f3.8-5.6 XR has a focal range of 28-200mm and 7.1X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 300mm.
