It's called the No-No Cardinal Feeder, because it says NO to squirrels, who can't get at the seeds through the all-metal feeder.
But it says YES to cardinals, both by its red color and also by the design, which is easy for cardinals to land on and use.
Cardinals don't like some feeders, because they don't like to feed with their necks turned sideways. They like a feeder that lets them land and eat straight ahead. Try the Non-No Cardinal Feeder, and see how many cardinals you attract!
Everyone interested in watching wild birds deserves her or his very own binoculars.
A good binocular for getting started does not have to be expensive, but it should have good optical quality.