The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron AF 18-270mm f3.5-6.3 II VC LD and the Pentax 18-270mm F3.5-6.3 ED SDM 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. Tamron AF 18-270mm f3.5-6.3 II VC LD is the longer of the two lenses at 101mm. The Pentax 18-270mm F3.5-6.3 ED SDM with a length of 89mm, is 12mm shorter. Besides being longer, the Tamron AF 18-270mm f3.5-6.3 II VC LD also has a larger diameter of 80mm compared to the Pentax 18-270mm F3.5-6.3 ED SDM's 76mm 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. Pentax 18-270mm F3.5-6.3 ED SDM weighs 453g, 19% (107g) lighter than the Tamron AF 18-270mm f3.5-6.3 II VC LD's weight of 560g.
Filter Threads
The Tamron AF 18-270mm f3.5-6.3 II VC LD has a filter size of 72mm whereas the Pentax 18-270mm F3.5-6.3 ED SDM 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 72mm filters that we recommend you to consider for the Tamron AF 18-270mm f3.5-6.3 II VC LD:
And these are the 62mm filters that we recommend for the Pentax 18-270mm F3.5-6.3 ED SDM:
Lens Mounts
The Tamron AF 18-270mm f3.5-6.3 II VC LD has the Canon EF lens mount whereas the Pentax 18-270mm F3.5-6.3 ED SDM has the Pentax KAF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon T8i, Canon 90D and Canon SL3 for the Canon EF Mount and Pentax K-3 III Mono, Pentax KF and Pentax K-3 III for the Pentax KAF Mount.
Tamron AF 18-270mm f3.5-6.3 II VC LD is also available in the Nikon F (DX) mount.
Focal Range
Both lenses have the same focal range of
18-270mm and the fastest aperture of
F3.5 - F6.3.
