Minolta bellows macro at 25mm f/2.5, 2-5x magnification bridging conventional macro and photomicrography.
The Minolta 25mm f/2.5 Bellows Micro is a specialised high-magnification lens designed for use on a bellows unit, providing magnifications beyond conventional macro range. The 25mm focal length with bellows extension achieves magnifications from approximately 2x to 5x, bridging the gap between standard macro and photomicrography.
The f/2.5 aperture provides useful brightness for viewing and focusing at high magnifications where light loss through the extended bellows is significant. The optical design is optimised for flat-field performance at these extreme magnifications, ensuring edge-to-edge sharpness on flat specimens.
Build quality is compact and specialised, designed to mount on Minolta bellows units. The lens has no internal focusing — magnification is controlled by bellows extension, and focus is achieved by moving the entire rig relative to the subject using the bellows focusing rail.
The Minolta 25mm f/2.5 Bellows Micro provides more moderate magnifications than the 12.5mm version, making it slightly easier to use while still providing genuine high-magnification capability beyond conventional macro lenses. It bridges standard macro and extreme photomicrography.