The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Ulanzi AF 27mm F2.8 and the OM System 90mm F3.5 Macro 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. OM System 90mm F3.5 Macro is the longer of the two lenses at 136mm. The Ulanzi AF 27mm F2.8 with a length of 48mm, is 88mm shorter. Besides being longer, the OM System 90mm F3.5 Macro also has a larger diameter of 70mm compared to the Ulanzi AF 27mm F2.8's 64mm 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. Ulanzi AF 27mm F2.8 weighs 182g, which means it is 271g (59%) lighter than the OM System 90mm F3.5 Macro which has a weight of 453g.
Filter Threads
The Ulanzi AF 27mm F2.8 has a filter size of 52mm whereas the OM System 90mm F3.5 Macro 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 52mm filters that we recommend you to consider for the Ulanzi AF 27mm F2.8:
And these are the 62mm filters that we recommend for the OM System 90mm F3.5 Macro:
Lens Mounts
The Ulanzi AF 27mm F2.8 has the Sony E lens mount whereas the OM System 90mm F3.5 Macro has the Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with these mounts are Sony ZV-E10 II, Sony A6700 and Sony FX30 for the Sony E Mount and OM System OM-3 Astro, OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount.
Focal Range
Ulanzi AF 27mm F2.8 is a prime lens with fixed focal lenght of 27mm which has an effective (full-frame 35mm equivalent) focal range of
40.5mm when used on a APS-C / DX format camera.
On the other hand, the OM System 90mm F3.5 Macro is a prime lens with fixed focal lenght of 90mm which has an effective (full-frame 35mm equivalent) focal range of 180mm when used on a FourThirds format camera.
