OM System M.Zuiko 25mm f/1.8 II
OM System · 25 mm · f/1.8
Score Breakdown
Scores combine our editorial testing with published lab data.
64
SCORE /100
What We Like
+Exceptionally sharp across the frame with minimal fringing
+IPX1 weather sealing adds durability for outdoor and wet conditions
+Extremely compact and lightweight at just 156g—fits in a jacket pocket
+Fast f/1.8 aperture excellent for low-light and depth-of-field control
+Included lens hood (accessory often missing from original)
+Premium metal body with ZERO coatings and smooth, responsive autofocus
Worth Knowing
−Stock lens cap is cheap and flimsy; difficult to attach/remove when hood is on
−Limited depth-of-field separation compared to full-frame equivalents due to smaller sensor
−Minor vignetting and chromatic aberration visible at wide-open aperture
−Premium pricing ($499.99) compared to non-sealed original version ($288)
General | |
|---|---|
About This LensThe OM System M.Zuiko 25mm f/1.8 II is exceptionally sharp across the frame with minimal fringing and is small enough to sit on the palm of your hand. The lens is weather-sealed to the IPX1 standard with five individual seals within the lens body to protect it from water and dust, and includes a lens hood in the box—key upgrades over the original. While slightly heavier and wider than the original, it offers the same premium metal build and finish complete with ZERO coating, making it an ideal 50mm-equivalent prime for travel and everyday Micro Four Thirds photography. | |
| Brand | OM System |
| Release Year | 2025 |
Production Status ⓘCurrent status of lens manufacturing (e.g., in production, discontinued). |  In Production |
Version ⓘThe iteration or release number of a particular lens model. | II |
Lens Mount ⓘThe lens mount will tell you what type of lens range you can fit onto the camera body. Often the same camera company will have different lens ranges for different cameras. | Micro Four Thirds |
System ⓘIndicates which camera system the lens is designed to attach to. | Micro Four Thirds |
Maximum Format ⓘLargest sensor size compatible with the lens. | Micro Four Thirds |
Physical64/100 | |
| Lens Weight | 156 g |
Lens Diameter ⓘWidth of the lens at its widest point | 59.4 mm |
Lens Length ⓘHow long the lens is from front to back. | 42 mm |
Front Filter Compatible ⓘSome lenses are compatible with front filters, some are compatible with back filters and some are compatible with both. Front filters are usually more convenient to add and remove. |  Yes |
Front Filter Size ⓘDiameter of attachable filters. | 46 mm |
Optics81/100 | |
Focal Range ⓘShortest to longest focal length of the lens (zoom range start - end ) | 25 mm |
Aperture Range ⓘLargest aperture at the lens's shortest focal length to longest focal length (aperture range start - end) | 1.8 |
| Focal Length Angle of View | 47° |
Flange Focal Distance ⓘDistance from lens mount to sensor. | 19.25 mm |
Diaphragm Type ⓘStructure and design of the aperture |  Automatic |
Blades ⓘNumber of diaphragm blades in aperture | 7020 |
Zoom Lens ⓘZoom allows you to vary the focal length, change between long shots and close-ups | No |
Closest Focusing Distance ⓘMinimum distance for a subject to be in focus. | 25 cm01500 |
Maximum Magnification ⓘLargest size a subject can be reproduced | 0.12x |
| Autofocus Mode |  Yes |
| Manual Mode |  Yes |
| Manual Focusing Ring |  Yes |
Features32/100 | |
Weather Sealing ⓘWeather sealing capabilities will give you more confidence when shooting in unfavourable conditions. |  Yes |
Fluorine Coating ⓘCoating to repel water and oil from lens elements. | No |
| Built In Lens Hood | No |
Teleconverter ⓘA teleconverter (extender) is an extra piece of equipment that fits between the lens and the camera body to enhance magnification | No |
| Image Stabilization | No |
Construction38/100 | |
Elements ⓘLens elements refer to individual pieces of glass within the lens. | 9 |
| Groups | 7 |
Aspherical Elements ⓘThe number of aspherical lens elements which can help correct aberrations such as spherical aberration. | 2 |
Bi Aspherical Elements ⓘElements with two non-spherical surfaces | 0 |
Low Dispersion ⓘElements that reduce chromatic aberration | 0 |
Super Low Dispersion ⓘAdvanced elements further reducing chromatic aberration | 0 |
CA Reduction ⓘBuilt-in features to reduce chromatic aberration | 0 |
Internal Focusing ⓘInternal Focusing means that the lens does not change in size during focusing, and the front element does not rotate. |  Yes |