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I'm not sure if I understand specifically what question you are asking... but am willing to take two guesses. If you are asking how to attach these to a modern camera ... then it would be possible to do so provided these use T-threads. You can get an adapter called a "t-ring" which will have the t-threads or M42 threads on the front (so they adapters can ...


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Using common-sense: Image stabilization system, let's say inside a lens, compensates movements of a fraction of a second, let's say, from the range of human shaky hands, 1/15 to sharp images, let's say 1/400. This is because the gear involved is low mass, a lens element or a sensor. A gimbal needs to stabilize a mass of let's say 1 kilo or a couple of ...


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I'd probably start by upgrading your camera body. The 5D Mark IV's low-light performance is quite a bit better than the Mark II, so you might find that upgrading your camera body to a Mark IV increases the usable ISO enough that the difference in lens speed doesn't bother you anymore. And its focusing system is also considerably better, too.


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The Sigma MC11 adapter has no optical elements between the lens and the camera body. It simply extends the distance the lens is in front of the imaging sensor of the shorter 18mm registration distance Sony E-mount cameras so that the lens is 44mm away from the image sensor. This is the same distance from the imaging sensor as a Canon EF mount lens would be ...


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Adapters that do not contain optical elements do not change the focal length of the lens. Adapters with optical elements often modify focal length by about 1.4x. Another type of adapter, known as a focal reducer, commonly modifies focal length by 0.7x. Focal length is based on when the lens is focused to infinity. When focusing closer, focus breathing, or ...


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