The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus 45mm F1.2 Pro and the Olympus M 45mm f1.8 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 45mm F1.2 Pro is the longer of the two lenses at 85mm. The Olympus M 45mm f1.8 with a length of 46mm, is 39mm shorter. Besides being longer, the Olympus 45mm F1.2 Pro also has a larger diameter of 70mm compared to the Olympus M 45mm f1.8'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. Olympus M 45mm f1.8 weighs 116g, 71% (294g) lighter than the Olympus 45mm F1.2 Pro's weight of 410g.
Below you can find the dimension and weight table of the Telephoto Prime Lenses in Micro Four Thirds Mount for size comparison purposes.
Telephoto Lenses in Micro Four Thirds Mount for Size Comparison
Filter Threads
The Olympus 45mm F1.2 Pro has a filter size of 62mm whereas the Olympus M 45mm f1.8 has a 37mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Olympus 45mm F1.2 Pro:
And these are the 37mm filters that we recommend for the Olympus M 45mm f1.8:
Lens Mounts
Both the Olympus 45mm F1.2 Pro and the Olympus M 45mm f1.8 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-1 II, Panasonic G9 II and OM System OM-5.
Focal Range
Both lenses have the same focal range of
45mm but while Olympus 45mm F1.2 Pro has the fastest aperture of
F1.2, the Olympus M 45mm f1.8's widest aperture value is
F1.8.