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Sigma general purpose lenses for Pentax DSLRs
Standard zoom lenses offer a general-purpose range from wide angle to short telephoto, thereby giving you great day-to-day flexibility and covering typical landscape shots to basic portrait work. The vast majority of standard zoom lenses in use are those kit models which are popularly bundled with many DSLRs, but Sigma offers a number of alternatives which you may want to upgrade to, or buy from day-one. They include brighter versions of standard ranges, or super-zoom models with massive optical ranges for the ultimate in compositional flexibility.
As always, bear in mind any reduction in field due to your DSLRs sensor when choosing a lens. Pentax’s APS-C have a reduction factor of 1.5x, which effectively multiply lens focal lengths by 1.5 times. So if you go for an 18-50mm lens, you’ll actually have an equivalent of 27-75mm.
Note: Sigma's DC lenses are not compatible with full-frame DSLRs. For a full explanation of lens specifications and examples of coverage at different focal lengths, check out our Camera Labs Lens Buyers Guide.
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Sigma 17-50mm f2.8 EX DC OS HSM
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Focal length: 17-50mm
Aperture: f2.8
Lens mount: DA-mount
Equiv on APS-C DSLR: 26-75mm
Full-frame compatible: No |
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Anti-shake: Yes
AF motor: HSM
Closest focus: 28cm
Filter thread: 77mm
Lens hood: TBC |
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Construction: 17 el. / 13 groups
Diaphragm blades: 7
Weight: TBC
Size (diam x length): 84x92mm |
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Sigma 17-70mm f2.8-4.5 DC Macro HSM
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Focal length: 17-70mm
Aperture: f2.8-4.5
Lens mount: DA-mount
Equiv on APS-C DSLR: 26-105mm
Full-frame compatible: No |
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Anti-shake: No
AF motor: HSM
Closest focus: 20cm
Filter thread: 72mm
Lens hood: TBC |
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Construction: 15 el. / 12 groups
Diaphragm blades: 7
Weight: 490g
Size (diam x length): 79x83mm |
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Sigma 17-70mm f2.8-4 DC Macro OS HSM |
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Focal length: 17-70mm
Aperture: f2.8-4
Lens mount: DA-mount
Equiv on APS-C DSLR: 26-105mm
Full-frame compatible: No
Anti-shake: Yes
AF motor: HSM |
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Closest focus: 22cm
Filter thread: 72mm
Lens hood: TBC
Construction: 17 el. / 13 groups
Diaphragm blades: 7
Weight: 535g
Size (diam x length): 79x89mm |
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Sigma 18-50mm f2.8 EX DC Macro HSM |
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Focal length: 18-50mm
Aperture: f2.8
Lens mount: DA-mount
Equiv on APS-C DSLR: 27-75mm
Full-frame compatible: No
Anti-shake: No
AF motor: HSM |
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Closest focus: 28cm
Filter thread: 72mm
Lens hood: LH780-04
Construction: 15 el. / 13 groups
Diaphragm blades: 7
Weight: 535g
Size (diam x length): 79x86mm |
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Sigma 18-50mm f2.8-4.5 DC OS HSM |
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Focal length: 18-50mm
Aperture: f2.8-4.5
Lens mount: DA-mount
Equiv on APS-C DSLR: 27-75mm
Full-frame compatible: No
Anti-shake: Yes
AF motor: HSM |
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Closest focus: 30cm
Filter thread: 67mm
Lens hood: TBC
Construction: 16 el. / 12 groups
Diaphragm blades: 7
Weight: 395g
Size (diam x length): 74x87mm |
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Sigma 18-125mm f3.8-5.6 DC
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Focal length: 18-125mm
Aperture: f3.8-5.6
Lens mount: DA-mount
Equiv on APS-C DSLR: 27-188mm
Full-frame compatible: No |
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Anti-shake: No
AF motor: requires AF motor in DSLR
Closest focus: 35cm
Filter thread: 67mm
Lens hood: TBC |
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Construction: 16 el. / 12 groups
Diaphragm blades: 7
Weight: 505g
Size (diam x length): 74x89mm |
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Sigma 18-200mm f3.5-5.6 DC |
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Focal length: 18-200mm
Aperture: f3.5-5.6
Lens mount: DA-mount
Equiv on APS-C DSLR: 27-300mm
Full-frame compatible: No
Anti-shake: No
AF motor: requires AF motor in DSLR |
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Closest focus: 45cm
Filter thread: 62mm
Lens hood: TBC
Construction: 15 el. / 13 groups
Diaphragm blades: 7
Weight: 405g
Size (diam x length): 70x78mm |
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Sigma 18-250mm f3.5-6.3 DC OS HSM |
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Focal length: 18-250mm
Aperture: f3.5-6.3
Lens mount: DA-mount
Equiv on APS-C DSLR: 27-375mm
Full-frame compatible: No
Anti-shake: Yes
AF motor: HSM |
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Closest focus: 45cm
Filter thread: 72mm
Lens hood: TBC
Construction: 18 el. / 14 groups
Diaphragm blades: 7
Weight: 630g
Size (diam x length): 79x101mm |
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Sigma 24-70 f2.8 IF EX DG HSM |
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Focal length: 24-70mm
Aperture: f2.8
Lens mount: K-mount
Equiv on APS-C DSLR: 36-105mm
Full-frame compatible: Yes
Anti-shake: No
AF motor: HSM |
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Closest focus: 38cm
Filter thread: 82mm
Lens hood: TBC
Construction: 14 el. / 12 groups
Diaphragm blades: 9
Weight: 790g
Size (diam x length): 89x95mm |
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Sigma 24-70mm f2.8 EX DG Macro |
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Focal length: 24-70mm
Aperture: f2.8
Lens mount: K-mount
Equiv on APS-C DSLR: 36-105mm
Full-frame compatible: Yes
Anti-shake: No
AF motor: requires AF motor in DSLR |
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Closest focus: 40cm
Filter thread: 82mm
Lens hood: LH875-02
Construction: TBC
Diaphragm blades: 9
Weight: 715g
Size (diam x length): 89x116mm |
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Sigma 28-300mm f3.5-6.3 DG Macro |
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Focal length: 28-300mm
Aperture: f3.5-6.3
Lens mount: K-mount
Equiv on APS-C DSLR: 42-450mm
Full-frame compatible: Yes
Anti-shake: No
AF motor: requires AF motor in DSLR |
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Closest focus: 50cm
Filter thread: 62mm
Lens hood: LH680-01
Construction: 15 el. / 13 groups
Diaphragm blades: 8
Weight: 490g
Size (diam x length): 74x86mm |
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Sigma lenses for Pentax DSLRs / Guide to lens specifications / Main lenses page
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