During my first test I mounted the slider on one tripod but I thought I could get better results by placing it directly on a table. The difference was less striking than I expected. The biggest problem in getting solid shots when going tele, is that the slider is too small and light when placing a camera like an EX1 plus accessories plus tripod head on a relatively narrow platform like the Konova slider. (you would need much, much wider and heavier rails to compensate for this and thus make it 'unportable') Starting and stopping the slide movement is causing the camera shake.
If you mount directly on the slider carriage by leaving out the tripod head, you should get considerably better results. You need an adapter screw to do so because out of the box, the screw is too big for the camera thread mount. Of course you also limit the composition of your shots without a tripod head.
One other thing to consider: the noticeable shake at tele is most visible at both ends of the rail. (start/stop the slide movement) You don't have to use the entire length of the shot- if you use the middle part, the shot is quite useable.
I think the Konova is a great slider but it is a portable slider and thus has its limitations. I'd rather have that than a 50 pound slider I can't get out of the door.
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