Traditional view: The conviction is admissible to impeach regardless of its age. The issue is to be weighed by the jury. Modern view: The trial judge has the discretion to exclude convictions whenever the probative value thereof is substantially outweighed by danger of unfair prejudice. Federal view: If less than 10 years ago and a felony, it must be admitted. If over 10 years ago, it is not admissible unless the probative value outweighs the prejudicial effect.