The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 18-270mm f3.5-6.3 II VC PZD and the Nikon 18-105mm f3.5-5.6G ED VR 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 18-105mm f3.5-5.6G ED VR is the longer of the two lenses at 89mm. The Tamron 18-270mm f3.5-6.3 II VC PZD with a length of 88mm, is 1mm shorter. Besides being longer, the Nikon 18-105mm f3.5-5.6G ED VR also has a larger diameter of 76mm compared to the Tamron 18-270mm f3.5-6.3 II VC PZD's 74mm 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. Nikon 18-105mm f3.5-5.6G ED VR weighs 420g, 6% (30g) lighter than the Tamron 18-270mm f3.5-6.3 II VC PZD's weight of 450g.
Filter Threads
The Tamron 18-270mm f3.5-6.3 II VC PZD has a filter size of 62mm whereas the Nikon 18-105mm f3.5-5.6G ED VR has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Tamron 18-270mm f3.5-6.3 II VC PZD:
And these are the 67mm filters that we recommend for the Nikon 18-105mm f3.5-5.6G ED VR:
Lens Mounts
Both the Tamron 18-270mm f3.5-6.3 II VC PZD and the Nikon 18-105mm f3.5-5.6G ED VR has the same Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (DX) lenses are Nikon D3500, Nikon D7500 and Nikon D5600.
Tamron 18-270mm f3.5-6.3 II VC PZD is also available in Canon EF mount.
Focal Range
Tamron 18-270mm f3.5-6.3 II VC PZD has a focal range of 18-270mm and
15.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
27-405mm when used on a APS-C / DX format camera.
On the other hand, the Nikon 18-105mm f3.5-5.6G ED VR has a focal range of 18-105mm and 5.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-157.5mm when used on a APS-C / DX format camera.