Sigma
18-250mm f/3.5-6.3 DC OS HSM Pentax-k
 vs
Sigma
17-70mm f/2.8-4 DC Macro OS HSM Pentax-k

vs

differences

Reasons to consider the Sigma 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Much more zoom 13.9x vs 4.1x
Help
 Around 3.5x more zoom, giving you more flexibility for photos
Significantly better telephoto 250 mm vs 70 mm
Help
 More than 3.5x more reach, less perspective distortion
Sigma 18-250mm f/3.5-6.3 DC OS HSM Pentax-k Learn more about
the Sigma 18-250mm f/3.5-6.3 DC OS HSM Pentax-k

Reasons to consider the Sigma 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Wider aperture f/2.8 vs f/3.5
Help
 At its widest, the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k captures slightly more light, 0.6 f-stops
Slightly more magnification 1:2.7 (0.4x) vs 1:3.4 (0.3x)
Help
 Take macro shots with subjects around 30% larger in your photo
Sigma 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k Learn more about
the Sigma 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k

similarities

Compared to lenses

Common Strengths Common Weaknesses
Focus motor Silent focus motor Help
Silent and fast
Image stabilization Good image stabilization Help
Sigma OS
Prime lens Both are zoom lenses Help
Typically not as sharp as prime lenses
Fixed aperture Both are variable aperture lenses Help
Narrower aperture at longer focal lengths

Compared to wide angle lenses

Common Strengths Common Weaknesses

LensHero is not aware of any interesting strengths shared by these two products.

LensHero is not aware of any interesting weaknesses shared by these two products.

competitors

Shared Competitors

Advantages

Disadvantages
Pentax SMC DA 18-135mm f/3.5-5.6 ED AL DC WR

Pentax SMC DA 18-135mm f/3.5-5.6 ED AL DC WR

Travel lens

$497
Wide maximum Has a higher max f/stop
Aperture Has a narrower aperture
Image stabilization Doesn't have image stabilization
Compare the SMC DA 18-135mm f/3.5-5.6 ED AL DC WR vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Compare the SMC DA 18-135mm f/3.5-5.6 ED AL DC WR vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Pentax SMC DA* 50-135mm f/2.8 ED SDM

Pentax SMC DA* 50-135mm f/2.8 ED SDM

Sports lens

$1,397
Fixed aperture Has a fixed aperture
Image stabilization Doesn't have image stabilization
Length Is longer
Compare the SMC DA* 50-135mm f/2.8 ED SDM vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Compare the SMC DA* 50-135mm f/2.8 ED SDM vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Tamron 28-75mm f/2.8 XR Di Pentax-k

Tamron 28-75mm f/2.8 XR Di Pentax-k

Portrait lens

$499
Wide maximum Has a higher max f/stop
Fixed aperture Has a fixed aperture
Image stabilization Doesn't have image stabilization
Focus motor Lacks a silent focus motor
Compare the 28-75mm f/2.8 XR Di Pentax-k vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Compare the 28-75mm f/2.8 XR Di Pentax-k vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Tamron 18-200mm f/3.5-6.3 XR Di-II Macro Pentax-k

Tamron 18-200mm f/3.5-6.3 XR Di-II Macro Pentax-k

Travel lens

$290
Aperture Has a narrower aperture
Image stabilization Doesn't have image stabilization
Compare the 18-200mm f/3.5-6.3 XR Di-II Macro Pentax-k vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Compare the 18-200mm f/3.5-6.3 XR Di-II Macro Pentax-k vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Pentax SMC DA 55-300mm f/4-5.8 ED

Pentax SMC DA 55-300mm f/4-5.8 ED

Wildlife lens

$397
Aperture Has a narrower aperture
Image stabilization Doesn't have image stabilization
Compare the SMC DA 55-300mm f/4-5.8 ED vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Compare the SMC DA 55-300mm f/4-5.8 ED vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Sigma 18-200mm f/3.5-6.3 DC Pentax-k

Sigma 18-200mm f/3.5-6.3 DC Pentax-k

Travel lens

$249
Aperture Has a narrower aperture
Image stabilization Doesn't have image stabilization
Compare the 18-200mm f/3.5-6.3 DC Pentax-k vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Compare the 18-200mm f/3.5-6.3 DC Pentax-k vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Sigma 18-125mm f/3.8-5.6 DC OS HSM Pentax-k

Sigma 18-125mm f/3.8-5.6 DC OS HSM Pentax-k

Travel lens

$339
Aperture Has a narrower aperture
Wide maximum Has a lower max f/stop
Compare the 18-125mm f/3.8-5.6 DC OS HSM Pentax-k vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Compare the 18-125mm f/3.8-5.6 DC OS HSM Pentax-k vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k

Sigma 18-250mm f/3.5-6.3 DC OS HSM Pentax-k Competitors

Advantages

Disadvantages
Sigma 28-300mm f/3.5-6.3 DG Macro Pentax-k

Sigma 28-300mm f/3.5-6.3 DG Macro Pentax-k

Wildlife lens

$299
Max focal length Better telephoto
Magnification Slightly more magnification
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the 28-300mm f/3.5-6.3 DG Macro Pentax-k vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Tamron 18-270mm f/3.5-6.3 Di II VC PZD Nikon-f

Tamron 18-270mm f/3.5-6.3 Di II VC PZD Nikon-f

Travel lens

$649
Zoom range More zoom
Weight Slightly lighter
Magnification Slightly less magnification
Compare the 18-270mm f/3.5-6.3 Di II VC PZD Nikon-f vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Tamron 18-250mm f/3.5-6.3 Di-II LD IF Macro Nikon-f

Tamron 18-250mm f/3.5-6.3 Di-II LD IF Macro Nikon-f

Travel lens

$279
Weight Slightly lighter
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the 18-250mm f/3.5-6.3 Di-II LD IF Macro Nikon-f vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Tamron 70-300mm f/4-5.6 Di LD Macro Pentax-k

Tamron 70-300mm f/4-5.6 Di LD Macro Pentax-k

Macro lens

$165
Magnification More magnification
Max focal length Better telephoto
Zoom range Much less zoom
Focus motor Doesn't have a silent focus motor
Compare the 70-300mm f/4-5.6 Di LD Macro Pentax-k vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Sigma 150-500mm f/5-6.3 DG HSM APO Pentax-k

Sigma 150-500mm f/5-6.3 DG HSM APO Pentax-k

Wildlife lens
Max focal length Significantly better telephoto
Zoom range Much less zoom
Image stabilization No image stabilization
Compare the 150-500mm f/5-6.3 DG HSM APO Pentax-k vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k

Sigma 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k Competitors

Advantages

Disadvantages
Pentax SMC DA 17-70mm f/4 AL SDM

Pentax SMC DA 17-70mm f/4 AL SDM

Wide angle lens

$597
Fixed aperture Has a consant aperture
Image stabilization No image stabilization
Aperture Narrower aperture
Compare the SMC DA 17-70mm f/4 AL SDM vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Tamron 18-200mm f/3.5-6.3 XR Di-II Macro Nikon-f

Tamron 18-200mm f/3.5-6.3 XR Di-II Macro Nikon-f

Travel lens

$199
Zoom range Much more zoom
Max focal length Better telephoto
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the 18-200mm f/3.5-6.3 XR Di-II Macro Nikon-f vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Sigma 18-50mm f/2.8 EX DC HSM Macro Nikon-f

Sigma 18-50mm f/2.8 EX DC HSM Macro Nikon-f

Wide angle lens

$379
Fixed aperture Has a consant aperture
Image stabilization No image stabilization
Zoom range Less zoom
Compare the 18-50mm f/2.8 EX DC HSM Macro Nikon-f vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Pentax SMC DA 16-45mm f/4 ED AL

Pentax SMC DA 16-45mm f/4 ED AL

Wide angle lens

$600
Fixed aperture Has a consant aperture
Weight Slightly lighter
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the SMC DA 16-45mm f/4 ED AL vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k
Tamron 17-50mm f/2.8 XR Di-II LD [IF] Pentax-k

Tamron 17-50mm f/2.8 XR Di-II LD [IF] Pentax-k

Wide angle lens

$459
Fixed aperture Has a consant aperture
Wide maximum Significantly narrower aperture
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the 17-50mm f/2.8 XR Di-II LD [IF] Pentax-k vs the 17-70mm f/2.8-4 DC Macro OS HSM Pentax-k

discussion Which do you think is better?

Speech is free, but discussion at LensHero is moderated! Please discuss your opinion of these lenses here, and discuss feedback for LensHero at our support community.

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