The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony CZ T* 50mm F1.4 ZA SSM and the Sigma 17-50mm F2.8 EX 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 17-50mm F2.8 EX DC OS HSM is the longer of the two lenses at 92mm. The Sony CZ T* 50mm F1.4 ZA SSM with a length of 72mm, is 20mm shorter. Besides being longer, the Sigma 17-50mm F2.8 EX DC OS HSM also has a larger diameter of 84mm compared to the Sony CZ T* 50mm F1.4 ZA SSM's 81mm 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 CZ T* 50mm F1.4 ZA SSM weighs 518g, which means it is 47g (8%) lighter than the Sigma 17-50mm F2.8 EX DC OS HSM which has a weight of 565g.
Filter Threads
The Sony CZ T* 50mm F1.4 ZA SSM has a filter size of 72mm whereas the Sigma 17-50mm F2.8 EX DC OS HSM has a 77mm 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 Sony CZ T* 50mm F1.4 ZA SSM:
And these are the 77mm filters that we recommend for the Sigma 17-50mm F2.8 EX DC OS HSM:
Lens Mounts
Both the Sony CZ T* 50mm F1.4 ZA SSM and the Sigma 17-50mm F2.8 EX DC OS HSM has the same Sony Alpha lens mount. Some of the latest released cameras that are compatible with the Sony Alpha lenses are Sony A99 II, Sony A68 and Sony A77 II.
Sigma 17-50mm F2.8 EX DC OS HSM is also available in Canon EF , Pentax KAF3, Sigma SA and Nikon F (DX) mounts.
Focal Range
Sony CZ T* 50mm F1.4 ZA SSM is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
75mm.
On the other hand, the Sigma 17-50mm F2.8 EX DC OS HSM has a focal range of 17-50mm and 2.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 25.5-75mm when used on a APS-C / DX format camera.
