Sigma
50-200mm f/4-5.6 DC OS HSM Pentax-k
 vs
Sigma
18-250mm f/3.5-6.3 DC OS HSM Pentax-k

vs

differences

Reasons to consider the Sigma 50-200mm f/4-5.6 DC OS HSM Pentax-k
Slightly cheaper $159.00 vs $479.00
Help
 The best price we've seen is $320 cheaper (3x less)
Sigma 50-200mm f/4-5.6 DC OS HSM Pentax-k Learn more about
the Sigma 50-200mm f/4-5.6 DC OS HSM Pentax-k

Reasons to consider the Sigma 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Much more zoom 13.9x vs 4x
Help
 Around 3.5x more zoom, giving you more flexibility for photos
Much narrower aperture f/22 vs f/5.6
Help
 At its narrowest, the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k goes 3.9 f-stops narrower
Wider aperture f/3.5 vs f/4
Help
 At its widest, the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k captures marginally more light, 0.4 f-stops
Better telephoto 250 mm vs 200 mm
Help
 Around 30% more reach, less perspective distortion
Better wide angle 18 mm vs 50 mm
Help
 2.8x better wide angle
Slightly more magnification 1:3.4 (0.3x) vs 1:4.5 (0.2x)
Help
 Take macro shots with subjects more than 30% larger in your photo
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

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 wildlife lenses

Common Strengths Common Weaknesses
Min focal length Good wide-angle Help
50-200mm f/4-5.6 DC OS HSM Pentax-k:50 mm
18-250mm f/3.5-6.3 DC OS HSM Pentax-k:18 mm
Lowest price Inexpensive Help
50-200mm f/4-5.6 DC OS HSM Pentax-k:$159.00
18-250mm f/3.5-6.3 DC OS HSM Pentax-k:$479.00

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

competitors

Shared Competitors

Advantages

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

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

Wildlife lens

$397
Image stabilization Doesn't have image stabilization
Focus motor Lacks a silent focus motor
Compare the SMC DA 55-300mm f/4-5.8 ED vs the 50-200mm f/4-5.6 DC OS HSM Pentax-k
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
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
Image stabilization Doesn't have image stabilization
Focus motor Lacks a silent focus motor
Compare the SMC DA 18-135mm f/3.5-5.6 ED AL DC WR vs the 50-200mm f/4-5.6 DC OS HSM Pentax-k
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
Pentax SMC DA 50-200mm f/4-5.6 ED WR

Pentax SMC DA 50-200mm f/4-5.6 ED WR

Wildlife lens

$247
Image stabilization Doesn't have image stabilization
Focus motor Lacks a silent focus motor
Compare the SMC DA 50-200mm f/4-5.6 ED WR vs the 50-200mm f/4-5.6 DC OS HSM Pentax-k
Compare the SMC DA 50-200mm f/4-5.6 ED WR 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 Has a significantly shorter telephoto lens
Min focal length Has a significantly narrower wide angle lens
Aperture Has a narrower aperture
Compare the 150-500mm f/5-6.3 DG HSM APO Pentax-k vs the 50-200mm f/4-5.6 DC OS HSM Pentax-k
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
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 Has better macro
Min focal length Has a slightly narrower wide angle lens
Image stabilization Doesn't have image stabilization
Compare the 70-300mm f/4-5.6 Di LD Macro Pentax-k vs the 50-200mm f/4-5.6 DC OS HSM Pentax-k
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 70-300mm f/4-5.6 APO DG Macro

Sigma 70-300mm f/4-5.6 APO DG Macro

Macro lens

$199
Magnification Has better macro
Min focal length Has a slightly narrower wide angle lens
Image stabilization Doesn't have image stabilization
Compare the 70-300mm f/4-5.6 APO DG Macro vs the 50-200mm f/4-5.6 DC OS HSM Pentax-k
Compare the 70-300mm f/4-5.6 APO DG Macro vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k

Sigma 50-200mm f/4-5.6 DC OS HSM Pentax-k Competitors

Advantages

Disadvantages
Canon EF 70-200mm f/2.8L IS USM

Canon EF 70-200mm f/2.8L IS USM

Sports lens

$1,899
Wide maximum Much narrower aperture
Fixed aperture Has a consant aperture
Length Longer
Lowest price More expensive
Compare the EF 70-200mm f/2.8L IS USM vs the 50-200mm f/4-5.6 DC OS HSM Pentax-k
Canon EF 70-200mm f/4L IS USM

Canon EF 70-200mm f/4L IS USM

Telephoto lens

$1,349
Wide maximum Much narrower aperture
Fixed aperture Has a consant aperture
Length Longer
Lowest price More expensive
Compare the EF 70-200mm f/4L IS USM vs the 50-200mm f/4-5.6 DC OS HSM Pentax-k
Sony 2 55-200mm f/4-5.6 DT

Sony 2 55-200mm f/4-5.6 DT

Wildlife lens

$200
Wide maximum Much narrower aperture
Magnification Slightly more magnification
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the 2 55-200mm f/4-5.6 DT vs the 50-200mm f/4-5.6 DC OS HSM Pentax-k
Sigma 70-300mm f/4-5.6 APO DG Macro Pentax-k

Sigma 70-300mm f/4-5.6 APO DG Macro Pentax-k

Macro lens

$209
Wide maximum Much narrower aperture
Magnification More magnification
Focus motor Doesn't have a silent focus motor
Image stabilization No image stabilization
Compare the 70-300mm f/4-5.6 APO DG Macro Pentax-k vs the 50-200mm f/4-5.6 DC OS HSM Pentax-k

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

Advantages

Disadvantages
Sigma 18-250mm f/3.5-6.3 DC Macro HSM Pentax-k

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

Travel lens

$399
Weight Slightly lighter
Image stabilization No image stabilization
Compare the 18-250mm f/3.5-6.3 DC Macro HSM Pentax-k vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Sigma 18-200mm f/3.5-6.3 II DC OS Pentax-k

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

Travel lens

$499
Focus motor Doesn't have a silent focus motor
Zoom range Less zoom
Compare the 18-200mm f/3.5-6.3 II DC OS Pentax-k vs the 18-250mm f/3.5-6.3 DC 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
Weight Slightly lighter
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 Pentax-k vs the 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM

Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM

Wildlife lens

$399
Weight Slightly lighter
Compare the 18-250mm f/3.5-6.3 DC Macro OS HSM vs the 18-250mm f/3.5-6.3 DC 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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