Manual Portable Lens Focal Length Meter Refractor Refractometer - AC/DC Optical Instrument

Discover precision and versatility with this optical device designed to meet a wide range of needs. With an impressive vertex power range of +15 to -15 diopters, this device ensures accurate adjustments with fine increments for detailed customization. The prismatic power offers 4 prism diopters with a precise 1 diopter step. Cylindrical axis adjustments span from 0 to 180 degrees, enhanced with a fine 1-degree step. Designed to accommodate lenses with diameters from 20mm to 80mm, it ensures compatibility with various lens types. The eyepiece focusing allows for adjustments between -5D to +5D for optimal clarity. Additionally, it includes a printer device for easy data management and a contact lens box for convenient storage.

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### Key Features:

- Vertex Power Range: +15 to -15 diopters
- Vertex Power Step: 0-(±)10D for 0.125D, (±)10D-(±)15D for 0.25D
- Prismatic Power Range: 4 prism diopters
- Prismatic Power Step: 1 diopter
- Cylindrical Axis Range: 0 to 180 degrees
- Cylindrical Axis Step: 1 degree
- Lens Accommodation: Diameter 20mm to 80mm
- Eyepiece Focusing: -5D to +5D
- Includes: Contact lens box and printer device
- Power Supply: DC 3V / AC 6V, 3W