| Model/f-ratio | Aperture | Focal Length | Length | Tube diameter | Weight | ||
| FS-60C f/5.9 | 60mm 2.35ins | 355mm | |||||
| FS-78 f/8 | 78mm 3.05ins | 630mm | |||||
| Sky 90 f/5.6 | 90mm 3.55 ins | 500mm | |||||
| FS-102 f/8 | 102mm 4.0ins | 820mm | |||||
| FSQ-106 f/5.5 | 106mm 4.2ins | 550mm | |||||
| FS-128 f/8 | 128mm 5.05ins | 1028mm | |||||
| FS-152 f/8 | 152mm 6.0ins | 1214mm | |||||