Description
- Diameter: 200mm. Focal length: 70/80/100/120/140/150/160/180/200/220mm. Thickness: 2mm.
- Grain pitch: 0.3mm or 0.5mm. Shape: Round. Material: Acrylic. Production proceSss: Cold forming. Transmittance: 92%.
- Professional and practical design with beautiful appearance, easy to carry and use.
- Usually used in laboratories, schools, teachers, sample observation, eyepiece protection, etc.