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 Sony E 10-18mm F4 OSS 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. Sony E 10-18mm F4 OSS is the longer of the two lenses at 64mm. The OM System 25mm F1.8 II with a length of 41mm, is 23mm shorter. Besides being longer, the Sony E 10-18mm F4 OSS also has a larger diameter of 70mm compared to the OM System 25mm F1.8 II's 56mm diameter.
Below you can find a scaled side-by-side image of OM System 25mm F1.8 II and Sony E 10-18mm F4 OSS to get a better idea of how their sizes compare in real life.
Comparison image of the OM System 25mm F1.8 II and the Sony E 10-18mm F4 OSS Size and Weight 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 69g (30%) lighter than the Sony E 10-18mm F4 OSS which has a weight of 225g.
Filter Threads
The OM System 25mm F1.8 II has a filter size of 46mm whereas the Sony E 10-18mm F4 OSS 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 Sony E 10-18mm F4 OSS:
Lens Mounts
The OM System 25mm F1.8 II has the Micro Four Thirds lens mount whereas the Sony E 10-18mm F4 OSS has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are OM System OM-3 Astro , OM System OM-5 II and OM System OM-3 for the Micro Four Thirds Mount and Sony ZV-E10 II , Sony A6700 and Sony FX30 for the Sony E Mount.
Focal Range
OM System 25mm F1.8 II 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.
On the other hand, the Sony E 10-18mm F4 OSS has a focal range of 10-18mm and 1.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of 15-27mm when used on a APS-C / DX format camera.
