Used to change the focal length of another lens, The lens shape does not intriduce more spherical aberrations to the system
| Gurley Precision Instruments | |
|---|---|
| Product Category | Optical Lenses |
| Product Number | G930 |
| Product Name | Precision Meniscus Concave-Convex Lenses |
| Lens Type | Meniscus; Spherical Lens |
| Focal Length | 50 mm (1.97 inch) |
| Center Thickness | 4 mm (0.1575 inch) |
| Edge Thickness | 1.4 mm (0.0551 inch) |
