Upload & Sell: Off
I've attempted to use my 400mm once, your shots give me hope there's a use for it in hockey!!!! Not to mention the amount of light you have, I peeked at the exif and it's rare I can go above 1/640, f2.8 @6400 iso is my go to settings for 90% of the rinks I shoot at....
Loving the first one, btw!
I assume you have the 400 on a monopod?