Comparison of Olympus 75-300mm ƒ/4.8-6.7 ED M.Zuiko Digital and Pentax 55-300mm f/4-5.8 ED SMC DA

Attribute	Pentax 55-300mm f/4-5.8 ED SMC DA ×	Olympus 75-300mm ƒ/4.8-6.7 ED M.Zuiko Digital ×
Filter Size (mm)	58	58
Notes	Included Accessories: Lens Hood	Included Accessores: Lens Hood
Length (mm)	111.5	116
Magnification Ratio (x)	0.28	0.18
Diameter (mm)	71	70
Closest Focus (m)	1.4	0.9
Focal Length (mm)	55.00 - 300.00	75.00 - 300.00
Diagonal Angle of View (degree)	5.40 - 29.00	4.10 - 16.00
Brand	Pentax	Olympus
Image Circle	APS-C	Micro Four-Thirds
Name	Pentax 55-300mm f/4-5.8 ED SMC DA	Olympus 75-300mm ƒ/4.8-6.7 ED M.Zuiko Digital
Weight (g)	440	430
Type	Telephoto Zoom	Telephoto Zoom
Aperture (f)	4.00 - 32.00	4.80 - 22.00
Diaphragm Blades	6	7
Diaphragm Blades Type	-	rounded
Lens Construction	12 elements in 8 groups, including ED elements	18 elements in 13 groups, including 2 ED and 3 HR elements
Zoom System	Rotary	Rotary
Focus Details	Quick-shift Focus System	Rear focusing with high-speed, silent AF (MSC)
APS Equivalent	82.5 - 450mm	-
35mm Equivalent	-	150 - 600mm