The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony E 16-50mm F3.5-5.6 PZ OSS and the Sigma 19mm F2.8 EX DN 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 19mm F2.8 EX DN is the longer of the two lenses at 46mm. The Sony E 16-50mm F3.5-5.6 PZ OSS with a length of 30mm, is 16mm shorter. On the other hand, the Sony E 16-50mm F3.5-5.6 PZ OSS has a larger diameter of 65mm compared to the Sigma 19mm F2.8 EX DN's 61mm 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 16-50mm F3.5-5.6 PZ OSS weighs 116g, which means it is 24g (17%) lighter than the Sigma 19mm F2.8 EX DN which has a weight of 140g.
Filter Threads
The Sony E 16-50mm F3.5-5.6 PZ OSS has a filter size of 41mm whereas the Sigma 19mm F2.8 EX DN has a 46mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 41mm filters that we recommend you to consider for the Sony E 16-50mm F3.5-5.6 PZ OSS:
And these are the 46mm filters that we recommend for the Sigma 19mm F2.8 EX DN:
Lens Mounts
Both the Sony E 16-50mm F3.5-5.6 PZ OSS and the Sigma 19mm F2.8 EX DN has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A6700, Sony FX30 and Sony ZV-E10.
Sigma 19mm F2.8 EX DN is also available in Micro Four Thirds mount.
Focal Range
Sony E 16-50mm F3.5-5.6 PZ OSS has a focal range of 16-50mm and
3.1X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
24-75mm when used on a APS-C / DX format camera.
On the other hand, the Sigma 19mm F2.8 EX DN is a prime lens with fixed focal lenght of 19mm which has an effective (full-frame 35mm equivalent) focal range of 28.5mm when used on a APS-C / DX format camera.