The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Panasonic 12-32mm F3.5-5.6 Mega OIS and the Panasonic Leica 25mm F1.4 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 Leica 25mm F1.4 is the longer of the two lenses at 55mm. The Panasonic 12-32mm F3.5-5.6 Mega OIS with a length of 24mm, is 31mm shorter. Besides being longer, the Panasonic Leica 25mm F1.4 also has a larger diameter of 63mm compared to the Panasonic 12-32mm F3.5-5.6 Mega OIS's 56mm 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 12-32mm F3.5-5.6 Mega OIS weighs 70g, which means it is 130g (65%) lighter than the Panasonic Leica 25mm F1.4 which has a weight of 200g.
Filter Threads
The Panasonic 12-32mm F3.5-5.6 Mega OIS has a filter size of 37mm whereas the Panasonic Leica 25mm F1.4 has a 46mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 37mm filters that we recommend you to consider for the Panasonic 12-32mm F3.5-5.6 Mega OIS:
And these are the 46mm filters that we recommend for the Panasonic Leica 25mm F1.4:
Lens Mounts
Both the Panasonic 12-32mm F3.5-5.6 Mega OIS and the Panasonic Leica 25mm F1.4 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.
Panasonic Leica 25mm F1.4 is also available in Four Thirds mount.
Focal Range
Panasonic 12-32mm F3.5-5.6 Mega OIS has a focal range of 12-32mm and
2.7X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
24-64mm when used on a FourThirds format camera.
On the other hand, the Panasonic Leica 25mm F1.4 is a prime lens with fixed focal lenght of 25mm which has an effective (full-frame 35mm equivalent) focal range of 50mm when used on a FourThirds format camera.