The author of the above question… in addition, a listing of camera attributes that t2i generators take into account, as I am having some problems trying to introduce a list of aperture setting related depth of field options?

You got that right bro. Greed breeds abuse of the customer. Mega-companies, become the worst problem the world has because of that same greed. To put it bluntly “Greed is not good” to mis-quote a 'Wall Street" movie character player by Charlie Sheen.