Product Information : Sigma 17-70mm F2.8-4 DC Macro OS HSM for Sigma

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Standard Zoom, Min. Focusing Distance (m): 0.22 m More product info

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Product information

Product
Product name	17-70mm F2.8-4 DC Macro OS HSM for Sigma
Product properties
Type	Standard Zoom
Lens Construction	17/13
Min. Aperture The aperture is the same as your iris. Amount of light at exposure can be varied by changing the size of the aperture hole. The smaller the whole is, the less light strikes the sensor. For many SLR / DSLR cameras you can choose aperture with a ring at the back of the lens. However, many digital cameras today have aperture settings on the camera. The aperture's main function is to control the depth of field.	22 f
Min. Focal Length Lens zoom ratio is a measure of how much the focal length can be varied. A lens that can be varied between 28-105mm has 3.75 times zoom ratio.	17 mm
Max. Focal Length Lens zoom ratio is a measure of how much the focal length can be varied. A lens that can be varied between 28-105mm has 3.75 times zoom ratio.	70 mm
Min. Focusing Distance (m) Closest focusing distance is the shortest distance that a lens can be focused on without additional accessories.	0.22 m
Min. Focusing Distance (ft)	0.72 ft
Magnification Ratio A magnification ratio of 1:1, means that a subject that is 1 cm long in real life will also measure 1 cm on film, and that means that with a 2:1 ratio the subject captured will appear twice its size.	1:2.7
Filter Size The filter is something that blocks certain colors, reflectors, signals etc.	72
Mounting It’s the interface, mechanical or electrical, between a lens and a camera body.	Sigma
Features
Picture Stabilization This makes it possible to prevent blurry pictures caused by hand movements.	Yes
Measures
Weight	535 g
Diameter x Length	79x88.9 mm
Special Features
Manufacturer	Sigma