Giving HS Football a shot!

[HighPlainsPhotographer]

I have been shooting HS wrestling for a couple of years for a local small town paper. They liked my wrestling photos so they are now sending me out for volleyball and football. I'm struggling a little bit with the faster moving sports, particularly football when the sun goes down. In these shot I used my 100-400 until it was too dark then switched to my 85 1.8 I was shooting with the aperature wide open in manual mode at 1600 - 3200 iso using the center focus point. C&C on my images and any thoughts for improving technique or camera settings would be greatly appreciated.

The ball carrier in the last shot is my son :-)

http://highplainsphotographer.smugmug.com/photos/366799592_czuJD-XL.jpg
http://highplainsphotographer.smugmug.com/photos/366803525_yFsbH-XL.jpg
http://highplainsphotographer.smugmug.com/photos/366933295_eqvgJ-XL.jpg
http://highplainsphotographer.smugmug.com/photos/367426645_jzaSk-XL.jpg
http://highplainsphotographer.smugmug.com/photos/367430324_nT4r2-XL.jpg

[dshankar]

Is it just me, or do you have massive CA issues on the last 2 pictures (especially the second to last pic)?

I love your 3rd picture though! Perhaps you could crop out the left part of the picture and just have the two people on the right?

[jpsamora]

Third is my fav. They are pretty good all things considered. I like the clarity on the QB's face on 4. 1 isn't very flattering for the player and 2 doesn't really do anything for me as far as composition is concerned. But I think the exposure looks real good on my monitor on all of them. So props there. Keep on shooting!

[Zivnuska]

Tighter.

[HighPlainsPhotographer]

Thanks for the comments. I'm not sure what to do about the CA, I have never had much of a problem with it when using this lens. Guessing the high iso and lighting conditions are the cause?