The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony E 18-135mm F3.5-5.6 OSS and the Sigma 18-200mm F3.5-6.3 DC 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. Sony E 18-135mm F3.5-5.6 OSS is the longer of the two lenses at 88mm. The Sigma 18-200mm F3.5-6.3 DC with a length of 78mm, is 10mm shorter. On the other hand, the Sigma 18-200mm F3.5-6.3 DC has a larger diameter of 70mm compared to the Sony E 18-135mm F3.5-5.6 OSS's 67mm 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 E 18-135mm F3.5-5.6 OSS weighs 325g, which means it is 80g (19%) lighter than the Sigma 18-200mm F3.5-6.3 DC which has a weight of 405g.
Filter Threads
The Sony E 18-135mm F3.5-5.6 OSS has a filter size of 55mm whereas the Sigma 18-200mm F3.5-6.3 DC 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 55mm filters that we recommend you to consider for the Sony E 18-135mm F3.5-5.6 OSS:
And these are the 62mm filters that we recommend for the Sigma 18-200mm F3.5-6.3 DC:
Lens Mounts
The Sony E 18-135mm F3.5-5.6 OSS has the Sony E lens mount whereas the Sigma 18-200mm F3.5-6.3 DC has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount and Sony A68, Sony A77 II and Sony A58 for the Sony Alpha Mount.
Sigma 18-200mm F3.5-6.3 DC is also available in Canon EF , Nikon F (DX), Pentax KAF and Sigma SA mounts.
Focal Range
Sony E 18-135mm F3.5-5.6 OSS has a focal range of 18-135mm and
7.5X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
27-202.5mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 18-200mm F3.5-6.3 DC has a focal range of 18-200mm and 11.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-300mm when used on a APS-C / DX format camera.
