Guide to Stereo Binocular Microscopes
For the most intricate repairs of jewellery, miniature paintings; for inspection of PCBs, prints, photographs, stamps, coins, medals; for identification of gemstones, plants and insects.
** See all microscopes ** Hobby and Pocket microscopes **
Professional microscopes (including a specialist gemmological microscope)
Contents
Magnifications and working distance
Magnifications (photographs)
Related Articles
Magnifications and working distance
Our stereo microscopes have WF (wide field) eyepieces, low-power objective lenses, and an optical system especially designed to give long working distances. This makes them suitable for inspection and repairs (watches, antiques, jewellery etc), "Biological' microscopes are different, they give working distances (for the magnifications listed below) of between 35mm and 0.5mm.
| Objective / Zoom System | Fixed Working Distance (WD)* | Eyepiece (Wide Field) | Total Magnification |
Application (scroll down for dozens of examples) |
|---|---|---|---|---|
|
0.3x – 0.5x |
230 to 300mm |
10x WF | 3x – 5x | Maximum tool clearance, assembly, soldering under lens |
| 15x WF | 4.5x – 7.5x | |||
| 20x WF | 6x – 10x | |||
|
1x |
150 to 230mm |
10x WF | 10x | Standard dissecting distance, PCB inspection, hand-tool work |
| 15x WF | 15x | |||
| 20x WF | 20x | |||
|
1.5x |
45 to 60mm |
10x WF | 15x | Balanced clearance and higher detail for smaller parts |
| 15x WF | 22.5x | |||
| 20x WF | 30x | |||
| 2x |
30 to 40mm |
10x WF | 20x | Close component inspection, small insect morphology |
| 15x WF | 30x | |||
| 20x WF | 40x | |||
|
4x |
15 to 25mm |
10x WF | 40x | High-magnification surface macro analysis, micro-cracks |
| 15x WF | 60x | |||
| 20x WF | 80x | |||
|
8x |
8 to 12mm |
10x WF | 80x | Fine crystalline structures, micro-electronics inspection |
| 15x WF | 120x | |||
| 20x WF | 160x | |||
|
10x |
5 to 8mm |
10x WF | 100x | Upper limit for stereo viewing, surface micro-detail |
| 15x WF | 150x | |||
| 20x WF | 200x | |||
|
Zoom Body (1x to 4x) (Continuous Optical Zoom) |
100 mm @ 1x 85 mm @ 4x |
10x WF | 10x – 40x | Continuous zoom, all applications |
| 15x WF | 15x – 60x | |||
| 20x WF | 20x – 80x |
*Working distance is primarily dictated by the Objective / Zoom setup, minor variations occur depending on eyepiece design and dioptre settings.
Note about zoom microscopes: the working distance will be the same for all magnifications (see each product description), and you get a relatively long working distance with all our stereo microscopes due to their high-quality lens system.
WHICH MICROSCOPE FOR ARTS & ANTIQUES, JEWELLERY & COLLECTABLES?
Coins & medals (5X to 10X for general grading; 10X to 30X for die errors): low power provides a full view of the coin's planchet and overall wear patterns and micro-abrasions (e.g. for grading) whereas higher power isolates die errors, repunched mint marks, and artificial surface toning (e.g. for forgery detection).
Stamp & postal history analysis (Philately) (3X to 7X for full stamp overview; 10X to 30X for micro-details): low power allows quick checks of perforation alignment and margins, while mid-range magnification exposes paper thickness, re-gumming, hidden repairs, and forged postmarks. die errors, re-gumming, and perforation damage.
Horology / watch repairing (5X to 10X for disassembly, 10X to 15X for fine work): lower power provides physical clearance for tools for most work (in fact, you will find that 3.5X to 5X is fine); higher power for very fine work such as untangling a small hairspring or inspecting micro-wear on balance staff pivots, gear teeth, and jewel bearings.
Hand engraving & jewellery making (3X to 8X): low power maximizes working distance and stereoscopic 3D vision, allowing comfortable hand movement whilst guiding gravers and setting tools under the lens.
Art & Antiques Restoration (3X to 10X for tool clearance; 10X to 30X for detail cleaning): lower power offers space for swabs, scalpels, and adhesives, whilst higher power guides microscopic cleaning of delicate surfaces.
Scale Model building (3X to 8X): low magnification keeps entire sub-assemblies in focus whilst providing depth perception for precise micro-decal placement and detail painting.
Document & banknote verification (3X to 10X for layout checks; 10X to 30X for microprinting): low magnification evaluates overall document alignment, whilst higher power confirms microprinted lines, paper fibre weaves, and ink layering.
Gemstones (5X to 10X for stone sizing; 10X to 45X for internal inclusions) low power evaluates overall cut and setting, whilst higher magnification exposes internal inclusions, cleavage planes, and growth zones.
Painting restoration & authentication (3X to 10X for overall composition; 10X to 40X for paint layers): low power allows wide-field scanning of overall surface condition, whilst higher power enables close analysis of paint layer stratigraphy, micro-cracking (craquelure), overpainting, and pigment structures.
Paper & print preservation (3X to 7X for sheet overview; 10X to 30X for fibre detail): low magnification offers a broad view of structural defects, while mid-to-high magnification reveals individual paper fibres, watermark structures, ink penetration, and distinguishing intaglio from planographic printing techniques.
Textile & tapestries conservation (5X to 10X for weave overview; 15X to 45X for fiber analysis): Low magnification aids in tracking thread twist patterns and structural weaves across large areas, while higher power isolates individual fiber degradation, dye penetration, and microscopic insect damage.
Ceramic, Glass & porcelain repair (3X to 10X for repair alignment; 10X to 25X for glaze inspection): low magnification maintains the wide field of view needed to guide tools during mending, while higher power highlights hairline cracks, glaze crackle, cold-paint touch-ups, and air bubbles.
Sculpture & Metal Object Conservation (3X to 8X for tool mark tracing; 10X to 30X for surface corrosion): low magnification helps track broad casting flaws and patina distribution across large metal surfaces, whilst higher power exposes active corrosion layers, solder repairs, and subtle tool marks.
Watch & Pocket Watch Restoration (horology) (5X to 10X for movement disassembly; 15X to 45X for gear & pivot wear): low power provides the depth perception and working space needed to handle tiny physical tools, while higher magnification detects micro-wear on balance staff pivots, gear teeth, and jewel bearings.
Ivory, bone & hardstone carving inspection (5X to 10X for grain alignment; 15X to 40X for synthetic detection): low magnification shows overall growth structures (e.g. to distinguish ivory from bone) whilst higher power reveals diagnostic Schreger lines, growth pores, and minute surface flaws that distinguish ivory from resin substitutes.
Jewellery, Cameo & gemstone authentication (5X to 10X for setting inspection; 10X to 45X for inclusions): Low power checks prong security and overall craftsmanship, whilst higher magnification exposes internal gemstone inclusions, doublets/triplets, micro-engravings, and surface-reaching fractures.
WHICH MICROSCOPE FOR ENGINEERING, ELECTRONICS, BIOLOGY?
Scale Model Building (3X to 10X): painting tiny details, applying micro-decals, and assembling miniature parts on scale figures, train sets, or models.
PCB (3X to 10X for board scanning; 10X to 30X for solder joints): low magnification allows quick scanning of large board areas; higher power isolates hairline trace fractures, cracked solder joints and pin bridging.
Hand soldering & rework (3X to 10X): low magnification to maximize field of view, working distance, and depth perception whilst manoeuvring soldering irons and micro-tweezers around surface-mount devices.
Micro-mechanical repair (5X to 10X for disassembly; 15X to 45X for pivot wear): lower power provides physical clearance for tools during movement disassembly; higher power to see micro-wear on delicate gear teeth, springs, and escapements.
Connector & cable assembly (3X to 10X): low magnification provides the spatial depth needed to align and terminate micro-pins inside complex, multi-conductor connectors or fibre optic assemblies.
Dissection (3X to 10X): Low power maintains a wide field of view and ample working distance for scalpel and forceps access when dissecting whole biological specimens.
Entomology (5X to 15X for sorting; 20X to 45X for keying species): lower power aids in rapid specimen sorting whilst higher magnification isolates tiny morphological features like wing venation, leg spines, or mouthparts.
Botany & seed analysis (5X to 10X for seed purity; 15X to 40X for cellular detail): low power allows efficient batch scanning of seed coats; higher power reveals plant micro-structures, pollen grains, and fungal spores.
Ecology & Sample sorting (3X to 10X): low magnification is ideal for sifting through liquid petri dishes and picking aquatic larvae or plankton out of field sediment without losing track of the sample.
Fossil & meteorite preparation (3X to 10X for chipping matrix; 10X to 25X for delicate bone borders): low magnification offers maximum clearance and safety for air scribes and micro-chisels while prepping specimens.
Fracture & Failure analysis (3X to 10X for crack propagation; 10X to 40X for fracture faces): lower power traces overall stress paths across metal or plastic parts whilst higher power reveals microscopic shear zones and fatigue beach marks.
Fly Tying for Fishing (3X to 8X): Keep at low power to provide the necessary hand-to-lens clearance for rapidly wrapping fine thread, feathers, and wire onto small hooks.
Magnifications (photographs)
These photographs give a relative idea of what you will see (find a 20p coin for reference). I took the photos by placing the camera to the eyepiece, really not the best way to take a photograph through a microscope! In reality, you will see a far greater area than shown in these photographs, the image will be spectacularly stereo and far sharper - something you cannot appreciate by looking at a picture on a monitor.

7.5X magnification

10Xmagnification

15Xmagnification

20X magnification

25X magnification

36X magnification
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