Comparison of Olympus 40-150mm f/4-5.6 ED Zuiko Digital and Pentax 50-200mm f/4-5.6ED SMC DA WR

Attribute	Pentax 50-200mm f/4-5.6ED SMC DA WR ×	Olympus 40-150mm f/4-5.6 ED Zuiko Digital ×
Aperture (f)	4.00 - 32.00	4.00 - 22.00
Diagonal Angle of View (degree)	8.10 - 31.50	8.20 - 30.00
Filter Size (mm)	49	58
Notes	Weather-resistant construction. Included Accessories: Lens Hood	Includes Lens Hood (LH-61B) and soft case (LSC-0814); Compatible with TC-14 Teleconverter and EX-25 Extension Tube
APS Equivalent	75 - 300mm	-
Type	Telephoto Zoom	Telephoto Zoom
Diaphragm Blades	6	7
35mm Equivalent	-	80 - 300mm
Image Circle	APS-C	Image Circle
Focal Length (mm)	50.00 - 200.00	40.00 - 150.00
Brand	Pentax	Olympus
Name	Pentax 50-200mm f/4-5.6ED SMC DA WR	Olympus 40-150mm f/4-5.6 ED Zuiko Digital
Weight (g)	285	220
Zoom System	Rotary	Rotary
Lens Construction	11 elements in 10 groups, including 1 ED element	12 elements in 9 groups, including one ED element
Diameter (mm)	69	65.5
Closest Focus (m)	1.1	0.9
Front Element Rotation	-	-
Length (mm)	79.5	72
Focus Details	"Quick Shift" AF/MF mechanism	-
Magnification Ratio (x)	0.24	0.14