matt_johnson25

<p>Thanks everyone.</p>

<p>Thank-you. Kent - my thinking (perhaps flawed), was to use FX body as DX in good light (extra reach) - and in low light, use as full frame to gain high ISO advantage - just dealing with having to get closer or having what I can shoot be limited. Others have said that high ISO performance improvement on FX body vs DX is perhaps less than many would contend.</p>

<p>Thank-you. I actually was thinking of either full frame in crop mode plus TC or just crop body plus TC - at least when I need the reach. Else, in low light, skip the TC. </p>

<p>Rodeo Joe - This is the kind of information I have been looking for. Thank-you.</p>

<p>Good feedback. Thank-you.</p>

<p>Thank-you. I believe even the D7200 and D7100 have different AF systems. I am not sure if you have the D7200 to compare it to? You do say you are doing the night soccer - what you feel usable ISO is on D7100? If you have any samples, would be much appreciated. Of course, you're under no obligation - just if you had them posted already.<br> Regardless, thank-you.</p>

<p>So I mainly use Fuji Mirrorless. Like it a lot. However, for soccer, which I have to shoot a fair amount of, it's simply insufficient. I have a 70-200 VR II on the way. Need a body to use it on. I am pretty sure I am going to want to use the TC-20E III with it. I have considered a whole bunch of different bodies. My penny pinching self thinks the D300s or D600. I am concerned about AF performance and additionally, for the D600, I know i'd be using the crop mode a fair amount of the time - which means I could crop very little - or such I would imagine with only 10MP to play around with.<br> The less penny pinching side of me thinks the D7200, D750, or D800. The d800 over the d750 because of the additional MP I'd get in crop mode. So I guess have some questions which if anyone would like, I'd love to hear some input on.<br> - Subject Isolation (ie limited DOF) of Full Frame, in crop mode or not - how much of a difference does it provide over crop mode? I guess I'm into real life. Is there a noticeable difference in the amount you can blow out the background DX vs FX?<br> - Color Range/Tonality - do colors really pop a ton more FX vs DX? <br> - From what I can tell, FX vs DX will give you about 1 to 1.5 stops of ISO performance improvement. It seems sort of stupid to me to have shelled out for the VR II 2.8 and then cripple myself backward the 1-2 stops I gained on the big lens by going DX? Does going into crop mode affect this all that much, if at all?<br> - Are the 3500/4800 CAM AF systems that much different for non-low-light situations? Is there massive improvement in performance for how well you hold onto a subject comparing something like the D300s vs D7200 or D600/D800 vs D750? I am more interested in the % of keepers you seen an increase in. A 30% increase for me is big. The 5-7% increase, not so much.<br> Any other thoughts would be greatly appreciated.<br> Thanks very much,</p>