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2x	$598 average price

(From Panasonic literature)

LUMIX S 2X Teleconverter Lens: DMW-STC20

There are two different teleconverters for the LUMIX S Series telephoto zoom lenses -- a 1.4x Teleconverter DMW-STC14 and a 2x Teleconverter DMW-STC20. They can be attached to the LUMIX S PRO 70-200mm F4 O.I.S. (S-R70200), enabling the use of the lens as a super telephoto lens with its extended zoom range of maximum 400mm for DMW-STC20 with high-speed, high-precision AF. The rugged dust/splash-resistant* design withstands use under harsh conditions even in 10 degrees below zero for high mobility.

Features

• LUMIX S TELECONVERTER LENS -- For LUMIX S Series Full-Frame L-Mount 70-200mm S-R70200 lens
• 400mm MAX -- Converts 70-200mm full-frame lens to a super telephoto lens with an extended zoom range of maximum 400mm
• LENS ELEMENTS -- 8 lenses including 2 UHR (Ultra High Refractive Index Lens) lenses in 4 groups
• RUGGED LENS DESIGN -- Dust/splash/freeze-resistant design withstands use under harsh conditions for high mobility

* Dust and Splash Resistant does not guarantee that damage will not occur if this lens is subjected to direct contact with dust and water.