Let's have some fun -- and reverse-engineer a pro soccer shot... the one below from the Guardian website, of the recent Arsenal-Liverpool FA Cup game. By Tom Jenkins, Nikon D4, f/4, 1/1000 sec, ISO 1600... 140mm lens. Which would yield a 210mm equiv on our APS-C sensors, close enough to compare with a 200mm lens on my K-30, or yours.
I'm going to assume that the DOF -- the depth-of-field for this photo -- was about 6 feet. For the player with the ball and the two other guys close behind him. They mark real tight in the Premier League. So if we plug the numbers into the Dofmaster Calculator, it turns out that Jenkins was about 50 feet away from the players. And that feels right... as a Guardian photographer, he had a field level pass, which you can tell from the angle of the shot. Actually, he might have been up to 100' away -- since DOF covers both in front of and in back of whatever he focused on... like the ball? In any case, he must've been right down there, in the first row of seats. Ooohh!
Further -- for the K-30, 200mm lens, if I want a 6' DOF At f/2.8, 85' away from the subject. At f/4, I need to be 70' away. At f/5.6, 60' away. At f/8, 50" away. It's actually worse than all that, because of the front-to-back DOF. But what can you do. And we'd be lucky to get by with f/5.6, given dim high school and jr. college lighting -- at least until Sen. Rand Paul becomes President and passes the National Small Stadium Lighting Act.
Interim solution? Ditch your job, divorce your wife, and be a pro soccer sports photographer in England. Hey, Gaugain ran off to Tahiti, didn't he? And then -- and only then -- you'll get that beautiful intense pro stadium lighting, and that pro field-level pass -- all so sadly denied to the rest of us!
@Miguel -- that morning, the fog was burning off when the runners came by. Sun! But today, dark clouds -- that extend in from the coast about ten miles -- photo below, out the car window, shows where the clouds stopped and the sun started. Sort of a daily war between the cloudy 'marine layer' and the sunny high coming towards us from the deserts to the east. But no rain -- yet. Reservoirs are still dry here.