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<blockquote data-quote="GracieAllen" data-source="post: 591086" data-attributes="member: 41283">I&quot;m through two days of images (about 2500) and I've concluded what I'm seeing is pretty specific.&nbsp; When the birds are against the sky there's no problem.&nbsp; I can focus and follow with no problem.&nbsp; Saturday I shot at ISO 800 most of the time, which is still slow for birds in flight (the sort-of &quot;rule of thumb&quot; I've always used is 1/1000 for perched birds and 1/2000 for bif), but other than some motion blur on the wings, they're pretty good.&nbsp; On the other hand, when the birds are in front of trees and such, I have a lot more trouble keeping them sharp.&nbsp; First, there's not as much light, so shutter speed is often 1/400 or so, and I believe when my 3D focus point moves off the bird it instantly refocuses on the trees.&nbsp; PREVIOUSLY, on the D300 and the D810 I've always turned up the focus lock-on value so it DIDN'T refocus so quickly.&nbsp; I'll have to figure out exactly what the equivalent is for the D500.I'll have to look at the Sunday images, when I used AFC 153, 3D, grp, and auto focusing to see if any of the other modes worked any better.....BTW:&nbsp; I haven't been able to install Capture NX on the desktop 'cause it has some kind of seizure every time I try and insist there's an old version on, and it HAS to remove it, and it can't find it, which causes it to puke all over it's feet...&nbsp; I'll have to see if I can find out how to get it installed so I can see the focus points...</blockquote>

[QUOTE="GracieAllen, post: 591086, member: 41283"] I"m through two days of images (about 2500) and I've concluded what I'm seeing is pretty specific. When the birds are against the sky there's no problem. I can focus and follow with no problem. Saturday I shot at ISO 800 most of the time, which is still slow for birds in flight (the sort-of "rule of thumb" I've always used is 1/1000 for perched birds and 1/2000 for bif), but other than some motion blur on the wings, they're pretty good. On the other hand, when the birds are in front of trees and such, I have a lot more trouble keeping them sharp. First, there's not as much light, so shutter speed is often 1/400 or so, and I believe when my 3D focus point moves off the bird it instantly refocuses on the trees. PREVIOUSLY, on the D300 and the D810 I've always turned up the focus lock-on value so it DIDN'T refocus so quickly. I'll have to figure out exactly what the equivalent is for the D500. I'll have to look at the Sunday images, when I used AFC 153, 3D, grp, and auto focusing to see if any of the other modes worked any better..... BTW: I haven't been able to install Capture NX on the desktop 'cause it has some kind of seizure every time I try and insist there's an old version on, and it HAS to remove it, and it can't find it, which causes it to puke all over it's feet... I'll have to see if I can find out how to get it installed so I can see the focus points... [/QUOTE]

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