The S-30 Series Stereo Microscope typically refers to a versatile class of entry-level to professional-grade instruments used for 3D observation in educational, industrial, and biological research settings. While “S-30” is used by multiple manufacturers, the most common models include the Evocus S30, Motic ST-30, and Optika S-30.
Common Key Features
- Optical System: Most modern S-30 series (like those from Evocus) utilize a Greenough optical system with full coating to provide high-resolution 3D images.
- Magnification:
- Zoom Models: Typically offer a 6.5:1 zoom ratio with standard ranges from 7x to 45x.
- Fixed/Turret Models: Models like the Motic ST-30 often feature a turret changer for quick switching between 2x and 4x objectives, resulting in 20x and 40x total magnification.
- Viewing Head: Ergonomic 45° inclined binocular or trinocular heads are standard to reduce neck strain during long sessions.
- Working Distance: Standard working distance is roughly 100mm, allowing ample space for manipulating specimens like circuit boards or biological samples.
- Illumination: Usually equipped with incident (top) and transmitted (bottom) LED lights. Cordless, rechargeable models are available for field use.

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