The Olympus Zuiko Digital ED 50-200mm F2.8-3.5 SWD is an interchangeable lens for Four Thirds system digital single-lens reflex cameras announced by Olympus Corporation on October 17, 2007. It added an ultrasonic motor (which Olympus branded SWD, for Supersonic Wave Drive) to the existing optical formula of the Olympus Zuiko Digital ED 50-200mm F2.8-3.5 introduced in 2003; it is slightly larger and heavier than the earlier lens.

Olympus Zuiko Digital ED 50-200mm F2.8-3.5 SWD

Maker	Olympus
Lens mount(s)	Four Thirds system
Technical data
Type	Zoom
Focus drive	Ultrasonic motor
Focal length	50-200mm
Aperture (max/min)	f/2.8 - f/3.5
Close focus distance	1.20 metres (3.9 ft)
Max. magnification	0.21
Diaphragm blades	9
Construction	16 elements in 15 groups
Features
Manual focus override	Yes
Weather-sealing	Yes
Lens-based stabilization	No
Aperture ring	No
Physical
Max. length	157 millimetres (6.2 in)
Diameter	87 millimetres (3.4 in)
Weight	995 grams (2.194 lb)
Filter diameter	67mm
Accessories
Lens hood	LH-70C
Case	LSH-1220
Angle of view
Diagonal	24–6.2°
History
Introduction	2007