My biggest gripe about Canon still glass (well, the biggest anyway) is that the focus ring is continuous; when combined with almost any follow focus, a repeatable focus pull is damn near impossible. Well Movie Engineering has found a solution. Their gears are lightweight delrin with an infinite outer gearing (unlike zip gears). A separate ring sits on a stable section of the lens, and limits the travel of the focus gear, thereby giving it a permanent focus range. The downside to all this is that the focus gears and limiting rings have specific internal diameters and travel ranges, so they are built specifically for one type of lens. But with all the cinema work and versatility coming to all this still glass, why not give it an upgrade that were dying for!?
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