Sigma 18-250Mm Lens

Aperture Range – Wide / Long f/3.5-22 / f/6.3-22
Aperture Max by Focal Length 18-21mm = f/3.5
22-36mm = f/4.0
37-42mm = f/4.5
43-72mm = f/5.0
73-127mm = f/5.6
128-250mm = f/6.3
Number of Aperture Blades :7
Rounded Aperture? :Y
Manufacturer Spec Size (DxL):
2.91 x 3.5” (74 x 89mm)
Measured Size (DxL): 3.06 x 3.82” (78 x 97mm)
Max Length at Full Extension 6.61” (167.9mm)
Internal Zoom? / Extends with Zoom? N / Y
Zoom Extension Length ; 2.79” (70.8mm)
Internal Focusing? / Extends with Focusing? Y / N
Lens Hood Size (DxL) 3.35 x 1.68” (85.1 x 42.7mm)
Lens Length with Hood (Min-Max) :5.25 – 8.04” (133.3 – 204.1mm)
Size of Rings: Focus / Zoom 0.66” / 1.44” (16.8mm / 36.6mm)