Comparison of Pentax 60-250mm ƒ/4 ED IF SDM SMC DA* and Sigma APO 100-300mm ƒ/4 EX DG HSM

Attribute	Sigma APO 100-300mm ƒ/4 EX DG HSM ×	Pentax 60-250mm ƒ/4 ED IF SDM SMC DA* ×
Filter Size (mm)	82	67
Notes	Available AF Mounts: [HSM version]: Sigma, Canon, Nikon; [w/o HSM]: Pentax, Sony	Included Accessories: Lens Hood
Closest Focus (m)	1.8	1.1
Magnification Ratio (x)	0.2	0.15
Type	Telephoto Zoom	Telephoto Zoom
Length (mm)	226.5	167.5
APS Equivalent	1.5x: 150 - 450mm; 1.6x: 160 - 480mm	92 - 383mm
Zoom System	Rotary; Internal	Rotary
Image Circle	35mm	APS-C
Focal Length (mm)	100.00 - 300.00	60.00 - 250.00
Brand	Sigma	Pentax
Name	Sigma APO 100-300mm ƒ/4 EX DG HSM	Pentax 60-250mm ƒ/4 ED IF SDM SMC DA*
Weight (g)	1440	1230
Aperture (f)	4.00 - 32.00	4.00 - 32.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	8.20 - 24.40	6.50 - 26.50
Lens Construction	16 elements in 14 groups, including 4 SLD elements	15 elements in 13 groups, including 2 ED elements
Diameter (mm)	92.4	82
Focus Details	Internal; HSM with full-time manual override	Hybrid SDM/screw drive autofocus, AF/MF switch