The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony DT 18-250mm F3.5-6.3 and the Sigma 150-500mm F5-6.3 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. Sigma 150-500mm F5-6.3 is the longer of the two lenses at 252mm. The Sony DT 18-250mm F3.5-6.3 with a length of 86mm, is 166mm shorter. Besides being longer, the Sigma 150-500mm F5-6.3 also has a larger diameter of 95mm compared to the Sony DT 18-250mm F3.5-6.3's 75mm 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. Sony DT 18-250mm F3.5-6.3 weighs 440g, which means it is 1340g (75%) lighter than the Sigma 150-500mm F5-6.3 which has a weight of 1780g.
Below you can find the dimension and weight table of the SuperZoom Lenses in Sony Alpha Mount for size comparison purposes.
Super Telephoto Lenses in Sony Alpha Mount for Size Comparison
Filter Threads
The Sony DT 18-250mm F3.5-6.3 has a filter size of 62mm whereas the Sigma 150-500mm F5-6.3 has a 86mm 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 Sony DT 18-250mm F3.5-6.3:
And these are the 86mm filters that we recommend for the Sigma 150-500mm F5-6.3:
Lens Mounts
Both the Sony DT 18-250mm F3.5-6.3 and the Sigma 150-500mm F5-6.3 has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A68, Sony A77 II and Sony A58.
Sigma 150-500mm F5-6.3 is also available in Canon EF , Nikon F (FX), Pentax KAF3 and Sigma SA mounts.
Focal Range
Sony DT 18-250mm F3.5-6.3 has a focal range of 18-250mm and
13.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
27-375mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 150-500mm F5-6.3 has a focal range of 150-500mm and 3.3X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 225 - 750mm.
