Tele Vue 16mm Nagler Type 5Description Take a "spacewalk" across a wide, sharp 82 apparent field Compare a penny to a half dollar to see the relative size between a 50 and 82 apparent field almost 3 times the area difference! And while others boast of impressive apparent field sizes, Tele Vue's philosophy of "showing no field unless it's fine" stresses full field image quality as the ingredient for impressive views. Blackened lens edges, anti reflection threads and rubber