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I have a A7E3 and several lenses among them the 70-300 G OSS. I find that many of my images are not in crisp focus while others seem ok. I have had several camera systems over the years and never had this kind of problem then or now with my other camera, a Panasonic g9 and 100-400mm Leica lens. The 70-300, using AF-C, cannot seem to auto focus to focus on very distant objects (infinity) Almost every single image shot at infinity is blurred noticeably. I am not sure its any better using my Ziess 16-35 f4 lens at infinity. Problem is size of the objects at infinity are really too small to make a critical judgement about sharpness. If I use manual focus with the 70-300, I get a much sharper image than with AF (set AF-C) and it make little difference how high the contrast in the scene is, they come out blurred on AF-C. This observation raises a question about images shot at closer range. Is this symptomatic of a general focus error or is it a limitation of the focus system in the A7R3, or finally have I a defective camera? Using wide area focus with the A7R3, many of the images shot at shorter distance that I thought would be in focus were less that as crisp as other images shot at similar distance. Bottom line, is this situation indicating a Camera issue that can be fixed, a problem in how I use this particular camera? Or, is it a lens issue with the 70-300 G OSS lens? I am baffled because I get much sharper images with my Panasonic G9 and the 100-400mm lens that I use for wildlife, than I get from the A7R3, which I use mainly for landscapes. Any suggestions and thoughts about this issue of mine?