When selecting a magnifying glass, you will often encounter two parameters: dioptres (D) and magnification. These two follow a fixed conversion formula, with different parameters corresponding to different usage scenarios; only by choosing the correct parameters can you meet your actual observation needs.

• 1. Daily Reading of Books and Newspapers: Choose 4D lenses, which provide 2x magnification. This offers a wide field of view and comfortable viewing, reducing eye strain during prolonged reading of books and newspapers. It is the standard specification for everyday home use.
• 2. Examining Documents and Appreciating Calligraphy and Paintings: 5D lenses provide 2.25x magnification, rendering details clearly. They are suitable for verifying handwriting on documents and appreciating the textures of calligraphy and paintings, balancing field of view with precision.
• 3. Antique and Coin Appraisal: 8D lenses offer 3x magnification, enabling clear identification of coin patterns and subtle signs of wear on collectibles, meeting the basic observation requirements for the appraisal of cultural artefacts.
• 4. Electronic Component Repair: The 12D lens provides 4x magnification, allowing clear viewing of solder joints on circuit boards and the patterns of small components, making it extremely practical for repairing household appliances and digital accessories.
• 5. Precision Microscopic Observation: The 20D lens offers 6x magnification, making it suitable for observing fine textures and microstructures, and meeting the high-precision requirements of tasks such as seal carving and precision quality inspection.

Purchasing Tips: The higher the dioptre value, the stronger the magnification effect, but the working distance for observation will correspondingly decrease. Select the appropriate parameters based on your specific usage scenario to achieve an ideal magnified viewing experience.