Comparison of Olympus 50-200mm f/2.8-3.5 Zuiko Digital and Pentax 60-250mm ƒ/4 ED IF SDM SMC DA*

Attribute	Olympus 50-200mm f/2.8-3.5 Zuiko Digital ×	Pentax 60-250mm ƒ/4 ED IF SDM SMC DA* ×
Zoom System	Rotary	Rotary
Aperture (f)	2.80 - 22.00	4.00 - 32.00
Diagonal Angle of View (degree)	6.00 - 24.00	6.50 - 26.50
Filter Size (mm)	67	67
Notes	Includes Lens Hood (LH-70B) and Lens Case (LSH-1220); Compatible with TC-14 Teleconverter and EX-25 Extension Tube	Included Accessories: Lens Hood
Focus Details	-	Hybrid SDM/screw drive autofocus, AF/MF switch
Type	Telephoto Zoom	Telephoto Zoom
Diaphragm Blades	7	9
Lens Construction	16 elements in 15 groups, including 3 ED elements	15 elements in 13 groups, including 2 ED elements
Image Circle	Image Circle	APS-C
Focal Length (mm)	50.00 - 200.00	60.00 - 250.00
Brand	Olympus	Pentax
Name	Olympus 50-200mm f/2.8-3.5 Zuiko Digital	Pentax 60-250mm ƒ/4 ED IF SDM SMC DA*
Weight (g)	1070	1230
Diameter (mm)	87	82
Length (mm)	157	167.5
35mm Equivalent	100 - 400mm	-
Magnification Ratio (x)	0.21	0.15
APS Equivalent	-	92 - 383mm
Closest Focus (m)	1.2	1.1