Orion 8216 16mm GiantView 100-degree Ultra-Wide Eyepiece You'll be amazed by our 16mm GiantView 100 Degree Ultra-Wide telescope eyepiece's vast 100 Degree apparent field of view 16mm focal length and huge field of view great for observing wide fields at high magnification Well corrected edges Fully multi-coated optics maximize light throughput for bright, pleasing views