The type of photography that you are planning to use is an important decision factor. Here we have evaluated the OM System 25mm F1.8 II and the Olympus 25mm F1.2 Pro 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. Olympus 25mm F1.2 Pro is the longer of the two lenses at 87mm. The OM System 25mm F1.8 II with a length of 41mm, is 46mm shorter. Besides being longer, the Olympus 25mm F1.2 Pro also has a larger diameter of 70mm compared to the OM System 25mm F1.8 II'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. OM System 25mm F1.8 II weighs 156g, which means it is 254g (61%) lighter than the Olympus 25mm F1.2 Pro which has a weight of 410g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Standard Lenses in Micro Four Thirds Mount for Size Comparison
Filter Threads
The OM System 25mm F1.8 II has a filter size of 46mm whereas the Olympus 25mm F1.2 Pro 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 46mm filters that we recommend you to consider for the OM System 25mm F1.8 II:
And these are the 62mm filters that we recommend for the Olympus 25mm F1.2 Pro:
Lens Mounts
Both the OM System 25mm F1.8 II and the Olympus 25mm F1.2 Pro 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
Both lenses have the same focal range of
25mm but while OM System 25mm F1.8 II has the fastest aperture of
F1.8, the Olympus 25mm F1.2 Pro's widest aperture value is
F1.2.
