12.5X Zoom Lens: 10 Models, Mount Options and Real Specs

The 12.5X family is the workhorse ratio in industrial zoom optics: 0.58X to 7.5X optical magnification on a 2/3-inch image circle, with a working distance published at 77.4 ± 2 mm on most models. What differs between the eight models is not the optics — it is the control method, the detent option, the fine-focus travel and the mechanical interface.

This page is a model index, not a selection essay. Every row is transcribed from the published product page.

Models at a glance

All values below are transcribed from the published product pages. Blank cells mean the value is not published for that model — treat as 待确认, not as zero.

Optical data at each magnification

The same optical platform means nearly identical resolution and depth of field at a given magnification. What changes with magnification is profound: at 0.58X the depth of field is around 1 mm, at 7.5X it collapses to a few hundredths of a millimetre.

PMS-LZL-12100

PMS-LZL-12100D15

How the eight models differ

Manual continuous. The baseline: zoom and focus rings, no electronics. Use when the magnification is set at commissioning.

Manual with detent. Discrete repeatable positions instead of a free ring. The detent models exist precisely because operators cannot reproduce a free-ring position by eye.

Fine-focus variants. The M12 / M3 suffixes denote fine-focus travel (12 mm / 3 mm) for setups where the object height varies between parts.

Motorized. Dual-motor or single-motor bodies driven over RS-232 or pulse/direction. Required when the PLC must change magnification inside the cycle.

What to confirm before ordering

• Control method and, if motorized, the protocol (RS-232 / pulse) and the SDK version.
• Whether repeatable positions are needed — if yes, ask for the detent variant.
• Fine-focus travel versus the actual part-height variation.
• Sensor: the family is published on a 2/3-inch circle. A 1-inch camera needs a different platform.
• Working distance is fixed at 77.4 ± 2 mm for most models; do not plan a 150 mm standoff around this family.

FAQ

Is 12.5X the magnification or the zoom ratio?

Zoom ratio. The optical magnification spans 0.58X to 7.5X; 7.5 ÷ 0.58 ≈ 12.9, which is rounded to the 12.5X family label.

Can I get 12.5X magnification out of this lens?

Not by itself. 12.5X is the ratio. Absolute magnification of 12.5X requires an objective or tube combination, and the total magnification follows the lens × tube × objective chain.

Why do some 12.5X models list a different working distance?

Mechanical variants with different front-end configuration publish different WD. Check the individual page rather than the family headline.

Are the detent positions equally spaced in magnification?

Treat the detent positions as repeatable mechanical stops. The published data gives optical performance per magnification step; it does not publish the exact stop-to-magnification mapping for every variant — confirm with the datasheet before designing around it.

Next step

Decide the control method first, then the fine-focus travel, then the detector. The optics are shared.

• Motorized zoom lens complete guide
• 6.5X vs 12.5X zoom lens: selection guide
• Working distance vs depth of field