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<blockquote data-quote="Fred Kingston_RIP" data-source="post: 191655" data-attributes="member: 10742">A) with regard to DOF, but not the f2.8... IOW, at the lower Fstop, the smaller the DOF will be, so if your focus point is off... you're gonna be in the out-of-focus areas of the DOF... At the lower f-stop that lens is sharp... but bumping it up a stop will be the sweet spot..D)... A tripod will increase your stability immensely... as will higher speed, especially at the higher focal length of that lens...If you want... you can do some testing by setting up a test bed... setup a target and anchor the camera on a rest so it doesn't move, and take a series of test shots... Do a google search for DSLR Fine Tune Adjustments... although your camera doesn't let you fine tune the lens's focus... you'll understand the issues related to front and back focus... and the links will give you some insight into the type of target you need for your test bed to determine whether the camera is at fault or not...</blockquote>

[QUOTE="Fred Kingston_RIP, post: 191655, member: 10742"] A) with regard to DOF, but not the f2.8... IOW, at the lower Fstop, the smaller the DOF will be, so if your focus point is off... you're gonna be in the out-of-focus areas of the DOF... At the lower f-stop that lens is sharp... but bumping it up a stop will be the sweet spot.. D)... A tripod will increase your stability immensely... as will higher speed, especially at the higher focal length of that lens... If you want... you can do some testing by setting up a test bed... setup a target and anchor the camera on a rest so it doesn't move, and take a series of test shots... Do a google search for DSLR Fine Tune Adjustments... although your camera doesn't let you fine tune the lens's focus... you'll understand the issues related to front and back focus... and the links will give you some insight into the type of target you need for your test bed to determine whether the camera is at fault or not... [/QUOTE]

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