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<blockquote data-quote="alfaholic" data-source="post: 335349" data-attributes="member: 13066">All photos are made with a tripod, camera set to self timer, auto-focus, f8 aperture, so there is no vibration, and I think there can not be so much back/front focus while using f8, or I am missing something.Look at this photo:<a href="https://drive.google.com/file/d/0Bz565Iyy7PBXeGFzNWdiOFduczQ/edit?usp=sharing" target="_blank">https://drive.google.com/file/d/0Bz565Iyy7PBXeGFzNWdiOFduczQ/edit?usp=sharing</a>It is 50% of the actual size, f8, I focused 2 or 3 meters from my position, so everything should be in focus to infinity.If you look bottom of the photo, I cropped it so that is the point I focused, and if you look at the rest of the image where you have things 5, 10, 100, and 1000 meters away, you will notice that nothing looks sharp, so if it is back/front focusing issue, something must be in focus, but at f8 and 18mm it is impossible to have everything out of focus, even if lens is back/front focusing. Please correct me if I am wrong...So, you think the last photos are still not sharp enough, the ones I made with VR turned off?</blockquote>

[QUOTE="alfaholic, post: 335349, member: 13066"] All photos are made with a tripod, camera set to self timer, auto-focus, f8 aperture, so there is no vibration, and I think there can not be so much back/front focus while using f8, or I am missing something. Look at this photo: [URL]https://drive.google.com/file/d/0Bz565Iyy7PBXeGFzNWdiOFduczQ/edit?usp=sharing[/URL] It is 50% of the actual size, f8, I focused 2 or 3 meters from my position, so everything should be in focus to infinity. If you look bottom of the photo, I cropped it so that is the point I focused, and if you look at the rest of the image where you have things 5, 10, 100, and 1000 meters away, you will notice that nothing looks sharp, so if it is back/front focusing issue, something must be in focus, but at f8 and 18mm it is impossible to have everything out of focus, even if lens is back/front focusing. Please correct me if I am wrong... So, you think the last photos are still not sharp enough, the ones I made with VR turned off? [/QUOTE]

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