Comparison of Canon EF 100-400mm f/4.5-5.6L IS II USM and Pentax 60-250mm ƒ/4 ED IF SDM SMC DA*

Attribute	Canon EF 100-400mm f/4.5-5.6L IS II USM ×	Pentax 60-250mm ƒ/4 ED IF SDM SMC DA* ×
Notes	Improved Image Stabilization with 3 modes and up to 4 stops correction; Dust and water resistant; Includes lens hood, tripod mount and case.	Included Accessories: Lens Hood
Magnification Ratio (x)	0.31	0.15
Filter Size (mm)	77	67
Length (mm)	193	167.5
Closest Focus (m)	0.98	1.1
Diagonal Angle of View (degree)	6.20 - 24.00	6.50 - 26.50
Focus Details	Inner focusing; Full-time manual focus and USM; Focus limiter switch; High-speed CPU and optimized AF algorithms	Hybrid SDM/screw drive autofocus, AF/MF switch
Focal Length (mm)	100.00 - 400.00	60.00 - 250.00
APS Equivalent	160 - 640mm	92 - 383mm
Brand	Canon	Pentax
Image Circle	35mm	APS-C
Name	Canon EF 100-400mm f/4.5-5.6L IS II USM	Pentax 60-250mm ƒ/4 ED IF SDM SMC DA*
Weight (g)	1640	1230
Type	Telephoto Zoom	Telephoto Zoom
Aperture (f)	4.50 - 40.00	4.00 - 32.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	-
Lens Construction	21 elements in 16 groups, including 1 Flourite and 1 Super UD element; Air Sphere Coating (ASC)	15 elements in 13 groups, including 2 ED elements
Zoom System	Rotary	Rotary
Diameter (mm)	94	82