Cook the corn in a pot full of boiling water. Once it has cooked, remove it from the pot and let it cool. Cut the corn off the cob and place in a large bowl.
Dice the onion and Anaheim pepper and add them to the bowl.
Chop the poblano peppers, red pepper, and cucumber. Add them as well.
Rinse the black beans well and add them. Measure out the feta and put it in the bowl.
In a smaller bowl add the vinegar, olive oil, lemon juice and ranch seasoning. Mix it up well and pour over the ingredients in the large bowl.
Mix it well and serve!