Comparison of Olympus 12-100mm ƒ/4 IS Pro M.Zuiko Digital ED and Pentax 17-70mm ƒ/4 AL IF SDM SMC DA

Attribute	Olympus 12-100mm ƒ/4 IS Pro M.Zuiko Digital ED ×	Pentax 17-70mm ƒ/4 AL IF SDM SMC DA ×
Aperture (f)	4.00 - 22.00	4.00 - 22.00
Diaphragm Blades Type	circular	-
Filter Size (mm)	72	67
Notes	VCM image stabilization up to 5 stops at 100mm (6.5 stops with E-M1 II's 5-axis Sync IS); Splash and dust proof	Included Accessories: Lens Hood
Focus Details	-	Internal; SDM with Quick-shift Focus System
Type	Standard Zoom	Standard Zoom
Diaphragm Blades	7	7
Diameter (mm)	77.5	75
Image Circle	Image Circle	APS-C
Focal Length (mm)	12.00 - 100.00	17.00 - 70.00
Brand	Olympus	Pentax
Name	Olympus 12-100mm ƒ/4 IS Pro M.Zuiko Digital ED	Pentax 17-70mm ƒ/4 AL IF SDM SMC DA
Weight (g)	561	485
Diagonal Angle of View (degree)	12.30 - 84.10	23.00 - 79.00
Lens Construction	17 elements in 11 groups, including 1 DSA, 3 aspherical, 5 ED, 1 HR and 2 Super HR elements); Z Coating Nano	17 elements in 12 groups
Zoom System	Rotary	Rotary
Closest Focus (m)	0.15	0.28
35mm Equivalent	24 - 200mm	-
Length (mm)	116.5	93.5
APS Equivalent	-	25.5 - 105mm
Magnification Ratio (x)	0.3	0.31