The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 50-100mm F1.8 A and the Sony E PZ 18-105mm F4 G 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 50-100mm F1.8 A is the longer of the two lenses at 171mm. The Sony E PZ 18-105mm F4 G with a length of 110mm, is 61mm shorter. Besides being longer, the Sigma 50-100mm F1.8 A also has a larger diameter of 94mm compared to the Sony E PZ 18-105mm F4 G's 78mm 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 PZ 18-105mm F4 G weighs 482g, 67% (1008g) lighter than the Sigma 50-100mm F1.8 A's weight of 1490g.
Filter Threads
The Sigma 50-100mm F1.8 A has a filter size of 82mm whereas the Sony E PZ 18-105mm F4 G 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 82mm filters that we recommend you to consider for the Sigma 50-100mm F1.8 A:
And these are the 72mm filters that we recommend for the Sony E PZ 18-105mm F4 G:
Lens Mounts
The Sigma 50-100mm F1.8 A has the Canon EF lens mount whereas the Sony E PZ 18-105mm F4 G has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are Canon T8i, Canon 90D and Canon SL3 for the Canon EF Mount and Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount.
Sigma 50-100mm F1.8 A is also available in the Nikon F (DX) and Sigma SA mounts.
Focal Range
Sigma 50-100mm F1.8 A has a focal range of 50-100mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
80-160mm when used on a APS-C / DX format camera.
On the other hand, the Sony E PZ 18-105mm F4 G has a focal range of 18-105mm and 5.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 27-157.5mm when used on a APS-C / DX format camera.
