AF-S 300mm f4 Woes

Started Nov 5, 2011 | Discussions thread
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PHXAZCRAIG
PHXAZCRAIG Forum Pro • Posts: 12,508
Re: AF-S 300mm f4 Woes

Try a careful newspaper test. Tape a newspaper to a flat wall. Line up the lens at a 'typical' distance, as close as possible to centered on a page and perpendicular, on a tripod.

Use Live View to get best focus. Mirror-lockup, and press shutter. Wait 30 seconds for shutter to release by itself, or use a remote release.

If it is bad then, you should see it easily. If not, then...? Perhaps your technique.

I looked closely at one of the bird shots, sitting on a branch, and looking at the branch and bird it did not look front- or back-focused. DOF was small though.

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