Doublet Objective Lens for DIY Refracting Achromatic Telescope
Suitable for DIY binoculars, viewing mirrors,
| Size | Diameter(mm ) | Focal Length(mm) | Coating |
| 30.5F130 | 30.5 | 130 | Blue Film |
| 30F98 | 30 | 98 | Blue Film |
| 31F120 | 31 | 120 | Blue Film |
| 32F114 | 32 | 114 | Blue Film |
| 34F208 | 34 | 208 | Green Film |
| 32F94 | 32 | 94 | Blue Film |
| 35F182 | 35 | 182 | Blue Film |
| 36F176 | 36 | 176 | Blue Film |
| 39F197 | 39 | 197 | Green Film |