The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron AF 18-250mm f3.5-6.3 II LD and the Pentax 18-250mm F3.5-6.3 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. Pentax 18-250mm F3.5-6.3 is the longer of the two lenses at 86mm. The Tamron AF 18-250mm f3.5-6.3 II LD with a length of 84mm, is 2mm shorter. Besides being longer, the Pentax 18-250mm F3.5-6.3 also has a larger diameter of 75mm compared to the Tamron AF 18-250mm f3.5-6.3 II LD'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. Tamron AF 18-250mm f3.5-6.3 II LD weighs 430g, which means it is 25g (5%) lighter than the Pentax 18-250mm F3.5-6.3 which has a weight of 455g.
Filter Threads
Both the Tamron AF 18-250mm f3.5-6.3 II LD and the Pentax 18-250mm F3.5-6.3 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 Tamron AF 18-250mm f3.5-6.3 II LD has the Canon EF lens mount whereas the Pentax 18-250mm F3.5-6.3 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 18-250mm f3.5-6.3 II LD is also available in the Nikon F (DX) , Sony Alpha and Pentax KAF mounts.
Focal Range
Both lenses have the same focal range of
18-250mm and the fastest aperture of
F3.5 - F6.3.
