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Opteka 500mm / 1000mm High Definition Mirror Telephoto Lens for Olympus - Four Thirds Mount

Product Description :
f8-16 High-index low-dispersion optical glass Fully multi-coated every element Anti-reflection coating
Incredibly compact and lightweight Fully Multi-coated Manual Focus
Soft pouch and three 3 rear mounted 305mm filters ND-2X ND-4X Skylight
500mm Mirror Lens 2x Multiplier Carrying bag and lens caps included
10 Year Warranty