The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Nikon Z 18-140mm f3.5-6.3 VR and the Pentax 18-135mm F3.5-5.6ED 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. Nikon Z 18-140mm f3.5-6.3 VR is the longer of the two lenses at 90mm. The Pentax 18-135mm F3.5-5.6ED with a length of 76mm, is 14mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 73mm.
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. Nikon Z 18-140mm f3.5-6.3 VR weighs 315g, which means it is 90g (22%) lighter than the Pentax 18-135mm F3.5-5.6ED which has a weight of 405g.
Filter Threads
Both the Nikon Z 18-140mm f3.5-6.3 VR and the Pentax 18-135mm F3.5-5.6ED have the same Filter thread size of 62mm.
Below are links to the 62mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Nikon Z 18-140mm f3.5-6.3 VR has the Nikon Z lens mount whereas the Pentax 18-135mm F3.5-5.6ED has the Pentax KAF3 lens mount. Some of the latest released cameras that are compatible with these mounts are RED Komodo-X 6K Z, Nikon Z50 II and Nikon Z30 for the Nikon Z Mount and , and for the Pentax KAF3 Mount.
Focal Range
Nikon Z 18-140mm f3.5-6.3 VR has a focal range of 18-140mm and
7.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
27-210mm when used on a APS-C / DX format camera.
On the other hand, the Pentax 18-135mm F3.5-5.6ED has a focal range of 18-135mm and 7.5X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-202.5mm when used on a APS-C / DX format camera.
