Which magnifying glass is suitable for watchmakers and goldsmiths?
A watch movement consists of parts that are often only a fraction of a millimetre in size. Without the appropriate magnification, scratches, burrs or misaligned settings will go undetected. What matters is not the highest magnification, but the right one for the task at hand.
The main types
- Single-lens magnifier (watchmaker’s loupe): clamped in front of the eye, leaves both hands free, ideal for workshop tasks and quick checks
- Head-mounted magnifier: sits on the head like a pair of spectacles, reduces strain on the eyes and neck during prolonged work
- Bench magnifier with light: stands on the workbench; suitable for calm, precise work such as setting, engraving and fine soldering
- Jeweller’s magnifier (10x): the standard for examining gemstones and settings
Which magnification is the right one?
The higher the magnification, the smaller the field of view and the shorter the distance between the magnifier and the workpiece. For beginners, low to medium magnification levels are usually sufficient.
Approximately 2.5x to 5x: cases, hands, dials and rough machining
Approximately 5x to 8x: gear trains, screws, escapements
10x: gemstones, settings and fine surface inspection
What to look out for when buying?
- Distortion-free optics; the image should not become blurred at the edges
- Sufficient working distance to accommodate tools and tweezers
- Good lighting, whether built-in or provided by a work lamp
- Comfortable seating, particularly for long periods of work
Common purchasing mistakes
- Excessive magnification: the field of view becomes tiny, making work tiring
- Cheap plastic lenses with visible distortion
- Lack of lighting in stand-mounted magnifiers
FAQ
What magnification does a watchmaker need?
For most tasks, around 3x to 5x is sufficient; for fine parts, up to around 8x.
Which is better: a single-lens magnifier or a head-mounted magnifier?
A single-lens magnifier is handy for quick checks, whilst a head-mounted magnifier is more comfortable for longer periods of work.
What kind of magnifier does a goldsmith use to examine gemstones?
A jeweller’s magnifier with 10x magnification is standard.
Conclusion
The best magnifying glass is the one that suits the task: low magnification for an overview, 10x for details. If you pay attention to clear vision, working distance and good lighting, you’ll work more accurately and tire less quickly.
