This review is based on testing this tilt head with a 200-500mm lens; I felt that I had to over-tighten the grip to prevent the lens from tipping, and this mostly happened when holding the monopod on my shoulder, but not always. Another issue is that both handles are on the same side. This gave me concerns about accidentally releasing the clamp handle. I chose the RRS MH-01 Lever-Release Monopod Head and couldn't be happier. Although it costs twice as much, the security is worth it when you consider the price of the hardware. The Sirui's head feels solid and if I had used a much smaller lens I probably would have kept it. I also have a Sirui monopod (P424) that I really like.
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