TAILIEUCHUNG - Complete Guide to the Nikon D200- P15

Complete Guide to the Nikon D200- P15:As with all my books, a full draft was reviewed by volunteers to weed out unclear language and misstatements. This book is better because of them. | Release a2AF-S Mode Priority Selection Recommendations 1. If you use other Nikon bodies especially ones that don t allow you to override this function consider leaving this setting at its default for consistency. 2. I think that it s much more likely that you d want to change the default on this option than it is on Custom Setting A1. Why Because Single Servo AF doesn t pick up on subjects that start to move after the focus sequence has initiated. The focus locks before the shutter opens so if the subject starts to move after the focus lock your focus won t be correct. This subtle difference means that with the default setting for A2 you will get more out-of-focus shots with subjects that start and stop motion. By setting Release you re relying upon the focus system to get a good read on where focus should be initially and move the lens as the mirror and shutter get out of the way. To that end I d also suggest that you only set Release if you ve got a fast f or faster lens and one with AF-S internal lens motor . Slower AF lenses with no internal motor are much less likely to get to the right focus point by the time the shutter is open. Custom Setting A3 Focus Area Size Focus Area Frame Unique to the D200 is the ability to set the framing area size of the detection area of the autofocus sensors. As I noted several times earlier in this work the underlying part that contains the autofocus sensors actually has seven physical sensing areas to it. Two of those areas can be subdivided into three which results in as many as eleven distinct focusing areas. Moreover the non-subdivided areas appear to be used slightly differently depending upon how you set this function. Thom Hogan s Complete Guide to the Nikon D200 Page 421 Normal Frame Wide Frame Eleven sensing areas used default Seven sensing areas used a Autofocus alAF-CMode Priority a2AF-S Mode Priority Focus Area Frame c x atGroup Dynamic AF 0 s a5 Lock-On NORM aS AF Activation ON atAFArea Illumination

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