Sigma
28-300mm f/3.5-6.3 DG Macro Pentax-k
 vs
Sigma
18-250mm f/3.5-6.3 DC OS HSM Pentax-k

vs

differences

Reasons to consider the Sigma 28-300mm f/3.5-6.3 DG Macro Pentax-k
Better telephoto 300 mm vs 250 mm
Help
 20% more reach, less perspective distortion
Slightly more magnification 1:3 (0.3x) vs 1:3.4 (0.3x)
Help
 Take macro shots with subjects more than 10% larger in your photo
Slightly lighter 490 g vs 0.6 kg
Help
 More than 20% lighter
Sigma 28-300mm f/3.5-6.3 DG Macro Pentax-k Learn more about
the Sigma 28-300mm f/3.5-6.3 DG Macro Pentax-k

Reasons to consider the Sigma 18-250mm f/3.5-6.3 DC OS HSM Pentax-k
Has a silent focus motor Sigma HSM vs None
Help
 Focuses quickly and silently
Image stabilization Sigma OS vs None
Help
 Helps eliminate blur caused by small camera movements
More zoom 13.9x vs 10.7x
Help
 Around 30% more zoom, giving you more flexibility for photos
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
Zoom range Incredible zoom Help
28-300mm f/3.5-6.3 DG Macro Pentax-k:10.7x
18-250mm f/3.5-6.3 DC OS HSM Pentax-k:13.9x
Max focal length Good telephoto Help
28-300mm f/3.5-6.3 DG Macro Pentax-k:300 mm
18-250mm f/3.5-6.3 DC OS HSM Pentax-k:250 mm
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
28-300mm f/3.5-6.3 DG Macro Pentax-k:28 mm
18-250mm f/3.5-6.3 DC OS HSM Pentax-k:18 mm
Weight Light weight Help
28-300mm f/3.5-6.3 DG Macro Pentax-k:490 g
18-250mm f/3.5-6.3 DC OS HSM Pentax-k:0.6 kg
Lowest price Inexpensive Help
28-300mm f/3.5-6.3 DG Macro Pentax-k:$299.00
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
Tamron 28-300mm f/3.5-6.3 XR Di Pentax-k

Tamron 28-300mm f/3.5-6.3 XR Di Pentax-k

Wildlife lens

$390
Compare the 28-300mm f/3.5-6.3 XR Di Pentax-k vs the 28-300mm f/3.5-6.3 DG Macro Pentax-k
Compare the 28-300mm f/3.5-6.3 XR Di Pentax-k 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
Max focal length Has a slightly longer telephoto lens
Zoom range Has significantly smaller zoom range
Compare the SMC DA 18-135mm f/3.5-5.6 ED AL DC WR vs the 28-300mm f/3.5-6.3 DG Macro 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
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
Max focal length Has a slightly longer telephoto lens
Wide maximum Has a lower max f/stop
Compare the 18-125mm f/3.8-5.6 DC OS HSM Pentax-k vs the 28-300mm f/3.5-6.3 DG Macro Pentax-k
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
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
Compare the 18-200mm f/3.5-6.3 XR Di-II Macro Pentax-k vs the 28-300mm f/3.5-6.3 DG Macro Pentax-k
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
Pentax SMC DA 50-200mm f/4-5.6 ED WR

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

Wildlife lens

$197
Zoom range Has way more smaller zoom range
Compare the SMC DA 50-200mm f/4-5.6 ED WR vs the 28-300mm f/3.5-6.3 DG Macro 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 28-300mm f/3.5-6.3 DG Macro 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
Pentax SMC DA 55-300mm f/4-5.8 ED

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

Wildlife lens

$397
Zoom range Has much smaller zoom range
Compare the SMC DA 55-300mm f/4-5.8 ED vs the 28-300mm f/3.5-6.3 DG Macro 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

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

Advantages

Disadvantages
Sigma 180mm f/3.5 EX DG APO Macro IF HSM

Sigma 180mm f/3.5 EX DG APO Macro IF HSM

Macro lens

$699
Magnification Much more magnification
Focus motor Has a silent focus motor
Zoom range Much less zoom
Min focal length Significantly worse wide angle
Compare the 180mm f/3.5 EX DG APO Macro IF HSM vs the 28-300mm f/3.5-6.3 DG Macro Pentax-k
Tamron 75-300mm f/4-5.6 LD Macro Nikon-f

Tamron 75-300mm f/4-5.6 LD Macro Nikon-f

Wildlife lens

$164
Zoom range Much less zoom
Aperture Narrower aperture
Compare the 75-300mm f/4-5.6 LD Macro Nikon-f vs the 28-300mm f/3.5-6.3 DG Macro Pentax-k
Tamron 28-300mm f/3.5-6.3 XR Di LD IF Macro Sony-alpha

Tamron 28-300mm f/3.5-6.3 XR Di LD IF Macro Sony-alpha

Travel lens

$419
Compare the 28-300mm f/3.5-6.3 XR Di LD IF Macro Sony-alpha vs the 28-300mm f/3.5-6.3 DG Macro Pentax-k

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

Advantages

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

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

Wide angle lens

$449
Aperture Wider aperture
Magnification Slightly more magnification
Zoom range Much less zoom
Max focal length Significantly worse telephoto
Compare the 17-70mm f/2.8-4 DC Macro OS HSM 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 28-75mm f/2.8 XR Di Pentax-k

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

Portrait lens

$499
Fixed aperture Has a consant aperture
Wide maximum Significantly narrower aperture
Zoom range Much less zoom
Focus motor Doesn't have 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
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

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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