The Feisol CB-50DC is unique in being the only head that is advertised to be made with carbon fiber.
|Stiffness About Vertical Axis||5400 +/- 65 Nm/rad|
|Stiffness About Radial Axis||4297 +/- 25 Nm/rad|
|Weight||1.24 lbs (0.562 kgs)|
|Manufacturer weight rating||41 lbs (0.25kgs)|
|Maximum Height||4.0 in (10.2 cm)|
|Base Diameter||2.5 in (6.4 cm)|
|Ball Diameter||50 mm|
|Quick Release||Arca Clamp|
The stiffness numbers for the CB-50DC are okay, but not class leading. Given the spectacular performance from the larger Feisol CB-70D, I had higher expectations for the CB-50DC. Clearly the basic design, which both share is strong. We naturally expect smaller diameter heads to be less stiff, but usually they perform more similarly from a stiffness/weight perspective. My best guess for the discrepancy is that the CB-50DC has a much smaller neck (the post the connects the ball and the clamp). This wouldn’t be the first time we have seen performance impacted by such a design choice.
Given the carbon fiber exterior, the CB-50DC isn’t particularly light. That’s not terribly surprising, since the carbon fiber is just that, an exterior. The head, like most others, is made entirely of aluminum with steel fittings. The carbon fiber surround simply looks kinda neat and feels nicer on the hands in cold weather. The carbon fiber here is mostly a gimmick, but hey, its original and people like gimmicks.