SG-Image is expected to announce a Micro Four Thirds (MFT) version of its AF 25mm F1.8 lens on June 15, according to reports from 43Rumors. This expansion brings the company’s existing APS-C prime lens—currently available for Sony E, Nikon Z, and Fujifilm X mounts—to the MFT ecosystem, offering a lightweight, autofocus-enabled option for compact camera users.
What are the specifications of the new SG-Image AF 25mm lens?
The upcoming MFT version follows the design architecture of the existing APS-C model, which is built with a 5-group, 7-element optical structure. According to technical specifications provided by 43Rumors, the lens incorporates three high-refractive-index elements to maintain high resolution across the frame. Key features include a maximum aperture of F1.8, a 9-blade diaphragm for soft bokeh, and a 52mm filter thread. The unit remains highly portable, measuring approximately 67mm in diameter and 33mm in length, with a total weight of about 139 grams.
Why does this release matter for Micro Four Thirds users?
The move to support MFT highlights a trend of third-party manufacturers targeting smaller, lighter camera systems with budget-friendly, autofocus-capable primes. At an estimated price point of 23,400 yen (including tax), the SG-Image AF 25mm F1.8 is positioned as an accessible daily carry lens. Its integration of a STM (stepping motor) for autofocus signals a shift away from manual-only budget glass, making the lens viable for both street photography and video production where quiet, smooth focus transitions are required.
How does this lens compare to existing alternatives?
When evaluating this release against current market offerings, the primary differentiator is the balance of weight and build quality. While many budget lenses utilize plastic barrels to save costs, the SG-Image lens features a metal exterior in a silver finish. This aesthetic choice is aimed at photographers using classic-styled mirrorless bodies. Below is a summary of the core design priorities for this lens:
| Feature | Specification |
|---|---|
| Weight | ~139g |
| Focus Motor | STM Stepping Motor |
| Aperture Blades | 9 blades |
Frequently Asked Questions
Is the SG-Image AF 25mm F1.8 weather-sealed?
Current specifications provided by 43Rumors do not list weather sealing as a feature. Users should exercise caution when using the lens in adverse weather conditions.
Will this lens support eye-autofocus on MFT cameras?
Because the lens utilizes an STM motor, it is designed to support modern autofocus protocols. However, performance may vary depending on the specific firmware of the camera body being used.
Where can I purchase this lens?
Following the official announcement expected on June 15, the lens is anticipated to be available through major retailers, including Amazon.
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