18-250mm F3.5-6.3 DC MACRO OS HSM
Available mounts
- SIGMA SA-mount
- Canon EF mount
- Nikon F mount
- Sony A-mount
- Pentax mount
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Camera Type
DSLR
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Corresponding Mount
SIGMA SA-mount, Canon EF mount, Nikon F mount, Sony A-mount, Pentax mount
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Sensor Format
APS-C [DC]
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Lens Construction
16 elements in 13 groups
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Angle of View
76.5°-6.5°
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Number of Diaphragm Blades
7 Blades (Rounded diaphragm)
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Minimum Aperture
F22
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Minimum Focusing Distance
35cm / 13.8in.
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Maximum Magnification Ratio
1：2.9
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Filter Size
φ62mm
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Dimensions (Diameter × Length)
⌀73.5mm × 88.6mm / ⌀2.9in. × 3.5in.
*The length of a lens is measured from the filter surface to its mount.
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Weight
470g / 16.6oz.
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Supplied Accessories
PENTAL TYPE LENS HOOD（LH680-04）Supplied.
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Mount / Product Barcode
SIGMA SA-mount：00-85126-88356-0 (discontinued)
Canon EF mount：00-85126-88354-6 (discontinued)
Nikon F mount：00-85126-88355-3 (discontinued)
Sony A-mount：00-85126-88362-1 (discontinued)
Pentax mount：00-85126-88361-4 (discontinued)
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Camera Compatibility
LINK
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* For Sigma SA mount
* DC lenses have an image circle that covers APS-C size image sensors. Not for use on digital cameras having image sensors larger than APS-C size or on 35mm or APS film cameras, as vignetting will occur. The angle of view varies depending on which camera the lens is mounted on. To find the 35mm camera-equivalent focal length, multiply the DC lens focal length by the crop factor (digital multiplier) of 1.5, 1.6, or 1.7, depending on the brand of DSLR camera on which the lens will be used. To find which DC lens is equivalent to a full-frame lens, divide the focal length of the full frame lens by the same crop factor.
* Sony A and PENTAX mounts are not incorporated with OS function.
Lens construction
SLD glass
Aspherical lens
MTF Chart
The MTF (Modulation Transfer Function) is one of the measurements for evaluating a lens’ performance, and it shows how faithfully the contrast of the subject can be reproduced on the image plane. The horizontal axis shows the image height (distance from the center of the image in mm) and the vertical axis shows the contrast value (maximum value is 1).
The closer the 10 line pairs/mm curve is to 1, the higher the contrast and clarity of the lens is, and similarly, the closer the 30 line pairs/mm curve is to 1, the better the resolution and sharpness of the lens is.
*The MTF chart depicts the result at the wide-open aperture.
*For mirrorless lenses that support distortion correction, the horizontal axis shows the image height equivalent to when an L-Mount lens is attached to a Sigma L-Mount camera with distortion correction applied. (The effect of distortion correction may differ depending on the mount and camera used.)
*The spatial frequency indicates the variation on the image plane before distortion correction is performed.
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Spatial frequency
S:Sagittal Line
M:Meridional Line
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10lp/mm
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30lp/mm
DIFFRACTION MTF
DIFFRACTION MTF
Distortion
effective distortion
When you take a picture of a lattice pattern, it will appear as the blue dotted line shows. The red line illustrates how the lattice pattern will appear in the actual picture when any lens distortion is taken into account.
relative distortion
In this chart, the horizontal axis shows the ideal image height (the distance from the center to the edge of the image [mm]). The vertical axis shows the extent of distortion. The extent of distortion is represented by how much Y, which is the actual image height, grows (or shrinks) against Y0 which is the ideal image height.
When you take the picture of a square object, if the distortion amount shows a minus value, the image will be seen as expanded (Barrel distortion). If the distortion amount is a plus value, it will be seen as a recessed (Pincushion distortion). When the distortion value is close to 0, the appearance of distortion is very minimal.
Vignetting
The horizontal axis shows the image height (the distance from the center to the edge of the image [mm]).The vertical axis shows the amount of light in the image (based on the amount of light in the image center being 100%). If the peripheral amount of light is lower than the center, the four corners of image will be darker (vignetting).
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F3.5(18mm) - F6.3(250mm)
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F8(18mm) - F8(250mm)
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F16(18mm) - F16(250mm)
