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 Tamron 11-20mm F2.8 A 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. Tamron 11-20mm F2.8 A is the longer of the two lenses at 86mm. The AstrHori 6mm f2.8 with a length of 61mm, is 25mm shorter. Besides being longer, the Tamron 11-20mm F2.8 A also has a larger diameter of 73mm compared to the AstrHori 6mm f2.8's 65mm 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. Tamron 11-20mm F2.8 A weighs 335g, 1% (5g) lighter than the AstrHori 6mm f2.8's weight of 340g.
Lens Mounts
Both the AstrHori 6mm f2.8 and the Tamron 11-20mm F2.8 A 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.
AstrHori 6mm f2.8 is also available in the Nikon Z , Canon RF 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 1.5x crop, it provides a 35mm (FF) equivalent of
9mm.
On the other hand, the Tamron 11-20mm F2.8 A has a focal range of 11-20mm and 1.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 16.5-30mm when used on a APS-C / DX format camera.
