I planted a garden for the first time this spring, which included tomato plants. A few days ago I noticed mild yellow spotting on the lower leaves, and this spotting has now spread to other leaves. I will admit that I am a glutton for punishment and have been watering them via sprinkler, which simply begs for a disease.

Could someone tell me if the leaves pictured appear to be signs of early blight or septoria leaf spot? Depending on which it is, any advice or are my plants doomed for this season?