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<blockquote data-quote="DraganDL" data-source="post: 271128" data-attributes="member: 18251">It seems that you misunderstood some basic technical terms - &quot;matrix&quot; and &quot;spot&quot; are the light metering modes (the way your camera calculates the elements of exposure, as to avoid over/underexposing the photo - the sensor, in combination with other electronic components measures the intensity of light flowing through the lens, so to speak).Focusing is a different thing - you turn your camera to the certain object, and try to make that object&nbsp; look &quot;sharp&quot;, while the areas in front and behind the object remain relatively &quot;blurred&quot;. To manually focus, you have to rotate the &quot;focus ring&quot;, until you either estimate that the focus point has been &quot;achieved&quot; or rely on a &quot;green dot&quot; (&quot;focus confirmation&quot;), if it works with your combo (camera body+lens).Please be more specific about your Tamron (tell us the EXACT, full designation of the lens). It is probably made in Nikon's AF-D fashion (&quot;screwdriver AF&quot;) meaning that autofocus works only with cameras (bodies) equipped with motor drive. Is it this lens, by any chance: <a href="http://goo.gl/0LsCTu" target="_blank">http://goo.gl/0LsCTu</a> ?</blockquote>

[QUOTE="DraganDL, post: 271128, member: 18251"] It seems that you misunderstood some basic technical terms - "matrix" and "spot" are the light metering modes (the way your camera calculates the elements of exposure, as to avoid over/underexposing the photo - the sensor, in combination with other electronic components measures the intensity of light flowing through the lens, so to speak). Focusing is a different thing - you turn your camera to the certain object, and try to make that object look "sharp", while the areas in front and behind the object remain relatively "blurred". To manually focus, you have to rotate the "focus ring", until you either estimate that the focus point has been "achieved" or rely on a "green dot" ("focus confirmation"), if it works with your combo (camera body+lens). Please be more specific about your Tamron (tell us the EXACT, full designation of the lens). It is probably made in Nikon's AF-D fashion ("screwdriver AF") meaning that autofocus works only with cameras (bodies) equipped with motor drive. Is it this lens, by any chance: [URL]http://goo.gl/0LsCTu[/URL] ? [/QUOTE]

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