The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Brightin AF 12mm F2.8 and the Venus 15mm f4.5 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. Brightin AF 12mm F2.8 is the longer of the two lenses at 97mm. The Venus 15mm f4.5 with a length of 48mm, is 49mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 70mm.
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. Venus 15mm f4.5 weighs 308g, 38% (191g) lighter than the Brightin AF 12mm F2.8's weight of 499g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Sony E Mount for size comparison purposes.
Ultra-Wideangle Lenses in Sony E Mount for Size Comparison
Filter Threads
The Brightin AF 12mm F2.8 has a filter size of 34mm whereas the Venus 15mm f4.5 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 34mm filters that we recommend you to consider for the Brightin AF 12mm F2.8:
And these are the 62mm filters that we recommend for the Venus 15mm f4.5:
Lens Mounts
Both the Brightin AF 12mm F2.8 and the Venus 15mm f4.5 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5, Sony A7R VI and Sony A7 V.
Venus 15mm f4.5 is also available in Nikon Z , Canon RF and Leica L mounts.
Focal Range
Brightin AF 12mm F2.8 is a prime lens with fixed focal lenght of 12mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
18mm.
On the other hand, the Venus 15mm f4.5 is a prime lens with fixed focal lenght of 15mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 22.5mm.
