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I have cut a full length 50mm wide strip off the 340x150mm CF plate. A single strip still feels remarkably stiff in bending. I am now thinking about measurement of the effect of this cantilevered "leaf spring." The load on the free end is now about 2lbs. The intention is to compensate for much of the load on the pancake lens. An upward force is required on the free end of the cantilever to "lighten the load."
If I set a block on each side of the leaf spring then I can place the digital scales on the blocks. Two further blocks will be placed on the scales to support the base of the camera. The load measured by the scales should reduce as I add packing between the camera base and the free end of the leaf spring. There is no need to use the camera itself. It just needs a similar weight to replace it. I used scrap timber blocks.
The bridging idea worked fine with the scales. The problem was that I had overestimated the stiffness of the CF. It took all three strips of 50mm x 2mm to achieve full upwards offset of the camera load. Otherwise the strips sagged too much. Three strips allowed an 18mm high block to completely neutralize the camera load.
Three strips, clamped firmly together only at one end, are not a true comparison with a single beam of full 6mm thickness. The combined stiffness could be increased if I epoxy the strips together, as laminations. I shall leave the CF strips untouched until I get the longer camera plate tomorrow. No point in drilling holes unnecessarily. A longer camera plate might offer a completely different insight.
The longer plate is just a bit longer. I decided to stop trying to be clever with leaf springs and make a rigid strip to support the camera. So now I have glued all three strips together to produce a single strip 340mm long x 50mm wide x 6mm thick.
Presently being pressed in the jaws of a B&D workbench. The new strip will be bolted at both ends. So will not suffer serious shearing forces between the laminations. The load being supported is also rather trivial. I just wanted to save weight over a solid strip of aluminium.
The images shows the results of laminating the three CF strips together. It is a long way from the telescope foot to the camera base. The short [standard] Manfrotto plate won't add very much support. The Manfrotto plate is clamping the CF strip between itself and the Kowa foot.
In fact the support was now adequate but I had discovered another problem. The short cable between the wireless receiver and the camera can get trapped behind the pancake lens. I kept clicking away thinking the camera was still not happy with its support. The shutter kept refusing to go off. Once I cleared the cable from the lens there were no more problems with releasing the shutter. Nor were there any more grinding noises.
Whoah! Sirui makes a range of adjustable, long lens, support plates/ brackets/ rails to suit different tripod heads. This is exactly what I need to support the G9 camera base. They even do one for Manfrotto heads: The VH-350. Their own heads need a TY-350.
Now I wonder whether the camera support system can go low enough. If not, I can add packing under the telescope foot. Except that these long, camera rails aren't a stock item at Danish camera shops.
But see the next exciting episode:
The bridging idea worked fine with the scales. The problem was that I had overestimated the stiffness of the CF. It took all three strips of 50mm x 2mm to achieve full upwards offset of the camera load. Otherwise the strips sagged too much. Three strips allowed an 18mm high block to completely neutralize the camera load.Three strips, clamped firmly together only at one end, are not a true comparison with a single beam of full 6mm thickness. The combined stiffness could be increased if I epoxy the strips together, as laminations. I shall leave the CF strips untouched until I get the longer camera plate tomorrow. No point in drilling holes unnecessarily. A longer camera plate might offer a completely different insight.
The longer plate is just a bit longer. I decided to stop trying to be clever with leaf springs and make a rigid strip to support the camera. So now I have glued all three strips together to produce a single strip 340mm long x 50mm wide x 6mm thick.Presently being pressed in the jaws of a B&D workbench. The new strip will be bolted at both ends. So will not suffer serious shearing forces between the laminations. The load being supported is also rather trivial. I just wanted to save weight over a solid strip of aluminium.
The images shows the results of laminating the three CF strips together. It is a long way from the telescope foot to the camera base. The short [standard] Manfrotto plate won't add very much support. The Manfrotto plate is clamping the CF strip between itself and the Kowa foot.
In fact the support was now adequate but I had discovered another problem. The short cable between the wireless receiver and the camera can get trapped behind the pancake lens. I kept clicking away thinking the camera was still not happy with its support. The shutter kept refusing to go off. Once I cleared the cable from the lens there were no more problems with releasing the shutter. Nor were there any more grinding noises.
Whoah! Sirui makes a range of adjustable, long lens, support plates/ brackets/ rails to suit different tripod heads. This is exactly what I need to support the G9 camera base. They even do one for Manfrotto heads: The VH-350. Their own heads need a TY-350. Now I wonder whether the camera support system can go low enough. If not, I can add packing under the telescope foot. Except that these long, camera rails aren't a stock item at Danish camera shops.
But see the next exciting episode:
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