Mike Rehmus
September 16th, 2002, 10:38 AM
After taping the photgraphers butt and back in a few weddings, I finally purchased a crane.
The Cobra Crane Backpacker from ProMax with the 3 foot extension.
At $199 plus $50 for the extension, this has got to be the least expensive crane around except for Ma's broomstick and gaffer tape.
How well is it built?
OK for $199 but maybe not good enough for your applications. It depends. Make certain it is what you want because they do not accept returns just because you don't like the merchandise!
Is it sturdy enough for the 6.5 pound limit they claim?
Not really. The 'L' brackets that hold the camera and mount the arm to the beam are really just bent pieces of 10 gage steel (about 1/8") and do bend a bit. This causes the 'Ls' to open up a bit and leaves the camera and the beam leaning. OK if you level in just one direction and don't have to pan the beam (or you have a motorized pan head that is adequate for the task). I had a PD-150 on it.
Will it shake in a breeze?
With the 3' extension, yes. Even a light breeze will move it. And the beam oscillates for quite a while after you stop a beam motion. Not so much up and down but side to side. It could use a bit of side-triangulation with a spreader and truss wires (like a sailboat mast)
What kind of tripod does it need?
Strong. No matter that the crane is balanced, there still is around 25 to 30 pounds of mass there. Moving and stopping it, not to mention supporting it, takes mass and strength. A flyweight 3 pound set of sticks won't work here. A big Sampson or Bogen (I used a 3051) is necessary.
How long does it take to learn to use it?
Get the video (included with the extension). Practice. My first use was at a Harley Davidson Police riding competition. I had to pan, tilt and crane up and down at high speeds. The competition covered an area about equal to a football field and the action ranges from a motorcyle in a tight pattern at the far corner to a motorcycle under full accelleration right past my postion. It worked out well. Considering the OTJT, I got some really usable footage.
A 9-10 foot crane is too short for covering a football field. Probably should have had a 20-30 foot crane mounted on a vehicle. No problem, right? Or maybe just 3 or 4 cranes spotted around the field.
Preparation time?
I had to add the extension and work out a mounting method for my tripod (which isn't the same one they sell for the purpose). Then I had to buy the bits and pieces for the control L extension cord. Few companies make 2.5 mm stereo mini jack extension cables so I had to buy a 1.5 to 2.5 mm adapter, a 3.5 mm extension cable and cut the male connector off the extension cable and solder on a 2.5 mm plug.
Then one has to mount the video monitor for the operator. I used a 3.9" Citizen LCD monitor which might be OK indoors but was definately a problem outdoors as I knew it would with its small viewing angle and propensity to wash out in light. I built a cardboard hood so I could see it at all.
The mount for the monitor, if is is attached to the system, must stay level when you crane up and down and still point at you when you pan with the crane. I ended up attaching the mount to the tripod head anyway. It worked out OK although I did have to contort a bit to always see it.
Final comment
I got what I paid for. It is OK and in an indoor setting, set to the side of the center-aisle door and holding a camera up over the door frame, it will be great. Everything can be placed agains the rear wall of the auditorium.
The Cobra Crane Backpacker from ProMax with the 3 foot extension.
At $199 plus $50 for the extension, this has got to be the least expensive crane around except for Ma's broomstick and gaffer tape.
How well is it built?
OK for $199 but maybe not good enough for your applications. It depends. Make certain it is what you want because they do not accept returns just because you don't like the merchandise!
Is it sturdy enough for the 6.5 pound limit they claim?
Not really. The 'L' brackets that hold the camera and mount the arm to the beam are really just bent pieces of 10 gage steel (about 1/8") and do bend a bit. This causes the 'Ls' to open up a bit and leaves the camera and the beam leaning. OK if you level in just one direction and don't have to pan the beam (or you have a motorized pan head that is adequate for the task). I had a PD-150 on it.
Will it shake in a breeze?
With the 3' extension, yes. Even a light breeze will move it. And the beam oscillates for quite a while after you stop a beam motion. Not so much up and down but side to side. It could use a bit of side-triangulation with a spreader and truss wires (like a sailboat mast)
What kind of tripod does it need?
Strong. No matter that the crane is balanced, there still is around 25 to 30 pounds of mass there. Moving and stopping it, not to mention supporting it, takes mass and strength. A flyweight 3 pound set of sticks won't work here. A big Sampson or Bogen (I used a 3051) is necessary.
How long does it take to learn to use it?
Get the video (included with the extension). Practice. My first use was at a Harley Davidson Police riding competition. I had to pan, tilt and crane up and down at high speeds. The competition covered an area about equal to a football field and the action ranges from a motorcyle in a tight pattern at the far corner to a motorcycle under full accelleration right past my postion. It worked out well. Considering the OTJT, I got some really usable footage.
A 9-10 foot crane is too short for covering a football field. Probably should have had a 20-30 foot crane mounted on a vehicle. No problem, right? Or maybe just 3 or 4 cranes spotted around the field.
Preparation time?
I had to add the extension and work out a mounting method for my tripod (which isn't the same one they sell for the purpose). Then I had to buy the bits and pieces for the control L extension cord. Few companies make 2.5 mm stereo mini jack extension cables so I had to buy a 1.5 to 2.5 mm adapter, a 3.5 mm extension cable and cut the male connector off the extension cable and solder on a 2.5 mm plug.
Then one has to mount the video monitor for the operator. I used a 3.9" Citizen LCD monitor which might be OK indoors but was definately a problem outdoors as I knew it would with its small viewing angle and propensity to wash out in light. I built a cardboard hood so I could see it at all.
The mount for the monitor, if is is attached to the system, must stay level when you crane up and down and still point at you when you pan with the crane. I ended up attaching the mount to the tripod head anyway. It worked out OK although I did have to contort a bit to always see it.
Final comment
I got what I paid for. It is OK and in an indoor setting, set to the side of the center-aisle door and holding a camera up over the door frame, it will be great. Everything can be placed agains the rear wall of the auditorium.