The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Thypoch 21mm f3.5 and the Panasonic 18-40mm F4.5-6.3 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. Panasonic 18-40mm F4.5-6.3 is the longer of the two lenses at 41mm. The Thypoch 21mm f3.5 with a length of 35mm, is 6mm shorter. Besides being longer, the Panasonic 18-40mm F4.5-6.3 also has a larger diameter of 68mm compared to the Thypoch 21mm f3.5's 58mm 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. Thypoch 21mm f3.5 weighs 131g, which means it is 24g (15%) lighter than the Panasonic 18-40mm F4.5-6.3 which has a weight of 155g.
Filter Threads
The Thypoch 21mm f3.5 has a filter size of 39mm whereas the Panasonic 18-40mm F4.5-6.3 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 39mm filters that we recommend you to consider for the Thypoch 21mm f3.5:
And these are the 62mm filters that we recommend for the Panasonic 18-40mm F4.5-6.3:
Lens Mounts
The Thypoch 21mm f3.5 has the Leica M lens mount whereas the Panasonic 18-40mm F4.5-6.3 has the Leica L lens mount. Some of the latest released cameras that are compatible with these mounts are Leica M EV1, Leica M11-D and Pixii Max for the Leica M Mount and Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount.
Focal Range
Thypoch 21mm f3.5 is a prime lens with fixed focal lenght of 21mm.
On the other hand, the Panasonic 18-40mm F4.5-6.3 has a focal range of 18-40mm and 2.2X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 27 - 60mm.
