Accidentally dropped a bayonet onto a stone from a meter height. Good luck. Replacing the mount for 4000 and everything works. like before. Now I switched to Canon 7D mark II from the first 7D. The perfect combination. I recommend. Has some pros Aperture. There are simply no analogues, there is nothing to compare with. Design. Metal, no tubes, all reinforced concrete. Sharp. If a camera with a good autofocus system, for example 77D, 80D, 7D mark II, then 99% of the focus. If something is earlier, for example, 7D, then the percentage of hits is less, in the region of 80-90. Good color rendering. Slightly yellowish, but easily corrected. Fast quiet focusing. Focusing is audible only on video, but much less than analog lenses, an external microphone solves the problem. Its cons: Too heavy. Payment for metal. After a couple of years of use, the hood is practically not fixed, you can accidentally shift and darken the corners of the frame. After the same two years of merciless exploitation, the zoom band stretched. An hour of lying the gum in acetone and a day of drying completely solved the problem. Stabilizer, or rather, its absence. On the one hand, a video would be useful. On the other hand, with such focal lengths, this is not very relevant, moreover. the stabilizer eats the battery.
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