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Comparing with singlet lenses, achromatic lenses have far superior optical performance.
| Specifications |
| Material: | See tables |
| Diameter tolerance: | +/-0.1mm |
| Design wavelength: | 546.1nm |
| Focal tolerance: | +/-2% |
| Surface quality : | 60-40 S/D |
| Centration: | 3 arcmin |
| Surtace flatness: | λ/4 @633nm |
| Clear aperture: | 90% |
| Bevel: | Protective bevel |
Optical glass