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 Sigma 18-250mm F3.5-6.3 DC OS HSM 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. Sigma 18-250mm F3.5-6.3 DC OS HSM is the longer of the two lenses at 89mm. The Tamron AF 18-250mm f3.5-6.3 II LD with a length of 84mm, is 5mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 74mm.
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 40g (8%) lighter than the Sigma 18-250mm F3.5-6.3 DC OS HSM which has a weight of 470g.
Filter Threads
The Tamron AF 18-250mm f3.5-6.3 II LD has a filter size of 62mm whereas the Sigma 18-250mm F3.5-6.3 DC OS HSM has a 72mm 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 AF 18-250mm f3.5-6.3 II LD:
And these are the 72mm filters that we recommend for the Sigma 18-250mm F3.5-6.3 DC OS HSM:
Lens Mounts
The Tamron AF 18-250mm f3.5-6.3 II LD has the Nikon F (DX) lens mount whereas the Sigma 18-250mm F3.5-6.3 DC OS HSM has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon D3500, Nikon D7500 and Nikon D5600 for the Nikon F (DX) Mount and Canon T8i, Canon 90D and Canon SL3 for the Canon EF Mount.
Tamron AF 18-250mm f3.5-6.3 II LD is also available in the Canon EF , Sony Alpha and Pentax KAF mounts.
Sigma 18-250mm F3.5-6.3 DC OS HSM is also available in Nikon F (DX) , Pentax KAF3, Sony Alpha, Sigma SA, Canon EF, Nikon F (DX), Pentax KAF3, Sony Alpha and Sigma SA mounts.
Focal Range
Both lenses have the same focal range of
18-250mm and the fastest aperture of
F3.5 - F6.3.
