New answers tagged manual-focus
D7000 Manual (p99) clearly states that having the lens on "M" while having the body on "AF" can cause damage to the camera. It does not say in what order the switches should be set so the safest procedure might be to turn the camera to the "off" position while setting the two switches.
Front or back focus issues can be the result of any of several issues. It's usually a combination of more than one of them since there's no such thing as a perfectly aligned lens, mounting flange, and focus system. The focus elements in the lens not moving exactly as the camera instructed is only one such cause. That particular issue most often results in ...
Use AE-L/AF-L button. go to Custom Setting Menu -> Controls -> Assign AE-L/AF-L button and set it to AF-ON. Now point your camera towards your object and half press the shutter button. Once focused press AE/AF-L button. focus will lock.
From the manual, page 33: Choose from the following focus modes. [...] Manual focus followed by some pictures showing how to select a specific focus mode which I'm not going to try to reproduce here, but the steps are basically: Place the cursor in the information display. Display focus mode options. Choose a focus mode.
These focusing aids are part of the focusing screen, which is part of the viewing system within the camera body. Some cameras have user-interchangeable focusing screens, others have factory-interchangeable focusing screens, and some cameras have focusing screens that cannot be changed. See for example Canon's leaflet on focusing screens here: ...
If the focusing aid was part of the lens, it would be visible in the image. That's because they are optical elements themselves, which means they change the properties of the light that goes through them in order to work. But you do not want them to be visible in the frame (neither film nor digital). The path of light goes always trough the lens and then ...
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