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 Z 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 Z 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 Z'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 Z weighs 135g, 60% (205g) lighter than the AstrHori 6mm f2.8's weight of 340g.
Lens Mounts
The AstrHori 6mm f2.8 has the Leica L lens mount whereas the Venus Laowa 4mm F2.8 Z has the Nikon Z lens mount. Some of the latest released cameras that are compatible with these mounts are Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and RED Komodo-X 6K Z, Nikon Z50 II and Nikon Z30 for the Nikon Z Mount.
AstrHori 6mm f2.8 is also available in the Sony E , Nikon Z and Canon RF 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 1.5x crop, it provides a 35mm (FF) equivalent of
9mm.
On the other hand, the Venus Laowa 4mm F2.8 Z 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.
