It's Thursday, and that means it's time for Midday theater critic J. Wynn Rousuck and her weekly review of the region's noteworthy thespian offerings. Today, she spotlights the new and unusual staging of William Shakespeare's Othello at Baltimore Shakespeare Factory.What's distinctive about this production of the classic tragedy is its use of ----Original Pronunciation,---- or O.P., which employs the sounds and rhythms of the English that actors in Shakespeare's London theaters would have spoken more than 400 years ago. The cast was trained in the antique dialect by O.P. coach Ann Turiano.Directed by Tom Delise, BSF's Othello features Troy Jennings in the title role, Kathryn Zoerb as Desdemona, and Ian Blackwell Rogers as Iago.Othello (in original pronunciation) continues at the Baltimore Shakespeare Factory through April 29.