The type of photography that you are planning to use is an important decision factor. Here we have evaluated the AstrHori 6mm f2.8 and the Venus Laowa 4mm F2.8 E 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. AstrHori 6mm f2.8 is the longer of the two lenses at 61mm. The Venus Laowa 4mm F2.8 E with a length of 26mm, is 35mm shorter. Besides being longer, the AstrHori 6mm f2.8 also has a larger diameter of 65mm compared to the Venus Laowa 4mm F2.8 E'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. Venus Laowa 4mm F2.8 E weighs 135g, 60% (205g) lighter than the AstrHori 6mm f2.8's weight of 340g.
Lens Mounts
The AstrHori 6mm f2.8 has the Canon RF lens mount whereas the Venus Laowa 4mm F2.8 E has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R6 V, Canon R6 III and Canon C50 for the Canon RF Mount and Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount.
AstrHori 6mm f2.8 is also available in the Sony E , Nikon Z and Leica L mounts.
Focal Range
AstrHori 6mm f2.8 is a prime lens with fixed focal lenght of 6mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
9.6mm.
On the other hand, the Venus Laowa 4mm F2.8 E is a prime lens with fixed focal lenght of 4mm which has an effective (full-frame 35mm equivalent) focal range of 6mm when used on a APS-C / DX format camera.
