The Feisol CB-70D has the largest ball diameter of any commercially available head. Its no great coincidence that it is also the stiffest ball head I have tested. The head is an absolute beast though at roughly double the size of the largest heads from most manufacturers. As such, it only really feels at home on the largest tripods.
| Name | Feisol CB-70D |
| Type | Ball Head |
| Stiffness About Vertical Axis | 21226 +/- 246 Nm/rad |
| Stiffness About Radial Axis | 9634 +/- 26 Nm/rad |
| Retail Price | $260 |
| Weight | 2.14 lbs (0.971 kgs) |
| Manufacturer weight rating | 83 lbs (0.44kgs) |
| Maximum Height | 5.0 in (12.7 cm) |
| Base Diameter | 3.3 in (8.4 cm) |
| Ball Diameter | 70 mm |
| Tension Control | yes |
| Panning Lock | yes |
| Quick Release | Arca Clamp |