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<blockquote data-quote="J-see" data-source="post: 420694" data-attributes="member: 31330">Actually, the top one is the one with blur. If you look at the name, you see it has a 2 added. It also is smaller in size.Quality can be subjective. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink&nbsp; &nbsp; ;)" loading="lazy" data-shortname=";)" />Btw, some more on focusing on a plane moving towards you. If you focus with tracking lock, it is entirely possible the focus does not move forward when the plane does since that's what this lock-on does; it ignores distance differences for a specific duration.It's to prevent focus from jumping to bushes or trees a target might suddenly and momentarily fly behind. In your case, the plane moves forward but to the system, this can as easily be interpreted a such a sudden distance change and thus be ignored in regards to focus adjustments. Especially when you focus on the nose of a plane which has quite a length difference from the middle to the end.Shots from below it should not be a problem. If your D7100 has settings to change the duration, toy with it for these shots and set it shorter if you have focus issues in such a case, or even disable tracking lock if needed.</blockquote>

[QUOTE="J-see, post: 420694, member: 31330"] Actually, the top one is the one with blur. If you look at the name, you see it has a 2 added. It also is smaller in size. Quality can be subjective. ;) Btw, some more on focusing on a plane moving towards you. If you focus with tracking lock, it is entirely possible the focus does not move forward when the plane does since that's what this lock-on does; it ignores distance differences for a specific duration. It's to prevent focus from jumping to bushes or trees a target might suddenly and momentarily fly behind. In your case, the plane moves forward but to the system, this can as easily be interpreted a such a sudden distance change and thus be ignored in regards to focus adjustments. Especially when you focus on the nose of a plane which has quite a length difference from the middle to the end. Shots from below it should not be a problem. If your D7100 has settings to change the duration, toy with it for these shots and set it shorter if you have focus issues in such a case, or even disable tracking lock if needed. [/QUOTE]

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