Instruction: Generate an answer to the question by utilizing the information contained in the document.

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Question: Is it sturdy enough to support a Canon 5D Mark II with 100mm macro lens vertically (lens pointed at ground)?
Document: Bought this to use with my monopodManfrotto 680 COMPACT MONOPOD - Monopodand zoom lensSigma 70-200mm f/2.8 EX DG APO HSM Large Aperture Macro Zoom Lens for Canon Digital SLR Camerasthe only problem was once everything was "attached" the camera and lens would tilt left or right. I wanted everything to tilt up or down which made handling very awkward at best.
Not much to say about this except that if not for the slight difficulty with the tilt locking knob, it would for sure be a five star review.The knob requires a little too much force to get a proper lock and is not comfortable enough to unlock without hurting your fingers.Other than this, the head is made very sturdy and is of solid construction. It sits very comfortably on top of my monopod and, once locked, holds a heavy camera load very reliably.Pros: Sturdy, solid construction.
This monopod head is sturdy, solid metal, and quite heavy. The quick release plate snaps into the head pretty easily. There is a small lever to lock the release so you won't accidentally jettison your camera. A spring-loaded piston pushes the quick release plate out of the frame when you flip the release switch. The monopod head looks like it will hold a heavy camera firmly enough. It tilts up and down, and the tilting head cinches securely when the knob is tightened.
The combination of this head and the SIRUI P-326 monopod is everything I need for support and ease of use with my 300mm/F2.8 lens.
This was actually the specific reason I stopped using the head. I could never get the tilt tight enough to the point where the lens and camera wouldn't creep forward or backward eventually.The third problem is the 200PL-14 mount plate that comes with this head is a little too small and doesn't appear to lock solidly to the head.
It can replace a tripod most of the time and give you just enough light movement to keep the scene interesting. It's a bit more $$$, but it's actually a surprisingly big bargain for the flexibility.I just bought the monopod so I could save some money with a head like this.Which I regret.This head ok for what it is, but you're gonna be unhappy with it.Just get a fluid head. It's every bit as important as your lens.
A bought a travel monopod, lightweight and strong. The first head I ordered came in at nearly 2.5 lbs. Ridiculous. Then I bought this little guy. It's perfect for a travel monopod (or tripod). More than beefy enough for my Nikon, even with 80-300mm lens.Part of the weight savings was because it didn't have extraneous features like panning which doesn't make sense for a monopod.
As usual, Manfrotto is a brand I have grown to trust for all of my camera support & accessory needs.I purchased the Manfrotto 234RC Quick Release head to complement my 680B monopod.
After much research, this is my 3rd recent Manfrotto buy, and I now trust the line enough not to look further.
I use this with my Manfrotto mono pod. It's very well made, extremely sturdy, and a snap to use. Highly recommended, especially considering the price.
Answer: Absolutely. I carry my 40D with a 70 - 200 2.8 with no issues.