The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic X 35-100mm F2.8 II and the Panasonic Leica 42.5mm F1.2 OIS 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 X 35-100mm F2.8 II is the longer of the two lenses at 100mm. The Panasonic Leica 42.5mm F1.2 OIS with a length of 77mm, is 23mm shorter. On the other hand, the Panasonic Leica 42.5mm F1.2 OIS has a larger diameter of 74mm compared to the Panasonic X 35-100mm F2.8 II's 67mm 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. Panasonic X 35-100mm F2.8 II weighs 357g, which means it is 68g (16%) lighter than the Panasonic Leica 42.5mm F1.2 OIS which has a weight of 425g.
Filter Threads
The Panasonic X 35-100mm F2.8 II has a filter size of 58mm whereas the Panasonic Leica 42.5mm F1.2 OIS has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 58mm filters that we recommend you to consider for the Panasonic X 35-100mm F2.8 II:
And these are the 67mm filters that we recommend for the Panasonic Leica 42.5mm F1.2 OIS:
Lens Mounts
Both the Panasonic X 35-100mm F2.8 II and the Panasonic Leica 42.5mm F1.2 OIS has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-3 Astro, OM System OM-5 II and OM System OM-3.
Focal Range
Panasonic X 35-100mm F2.8 II has a focal range of 35-100mm and
2.9X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
70-200mm when used on a FourThirds format camera.
On the other hand, the Panasonic Leica 42.5mm F1.2 OIS is a prime lens with fixed focal lenght of 43mm which has an effective (full-frame 35mm equivalent) focal range of 86mm when used on a FourThirds format camera.