3/7/2023 0 Comments Canon mark 5d ii accessoriesCan anyone explain me exactly how the focusing works when an adapter is used? Ever since that experience, I don’t believe in lens adapter anymore. The problem might have been in the lens adapter. In my opinion, it should affect the focus plane. But when there is a lens adapter, it changes the distance from the lens to the image sensor. But what happens when there is a 5mm thick lens adapter between the lens and camera? Doesn’t it change the plane of focus? The lens has a specific plane of focus set from factory. Now I wonder, on these combinations of three different parts, what decides when it is in focus? Is it the lens or the camera that knows when the object is in focus? Or is it both? I supposed it was the lens that knows when the object is in focus and sends the signal to the camera via the lens adapter. I carefully turned the focus dial until the red dot beeped. I think there was a problem with focusing. The lens was recommended by someone as a very sharp lens for copy work. ![]() ![]() It was a cheap type of adapter with focus confirmation chip. ![]() Sometime ago I bought a used Nikon 55mm micro-Nikkor manual focus lens and used it on my Canon 5D Mark-II with a lens adapter.
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