vs

differences

Reasons to consider the Tamron 70-200mm f/2.8 Di LD Macro Pentax-k

Significantly narrower aperture f/32 vs f/22
Help
At its narrowest, the 70-200mm f/2.8 Di LD Macro Pentax-k goes 1.1 f-stops narrower
More magnification 1:3.1 (0.3x) vs 1:5.8 (0.2x)
Help
Take macro shots with subjects around 90% larger in your photo
Better telephoto 200 mm vs 135 mm
Help
Around 50% more reach, less perspective distortion
Slightly cheaper $729.00 vs $1,396.95
Help
The best price we've seen is $668 cheaper (around 50% less)
Tamron 70-200mm f/2.8 Di LD Macro Pentax-k Learn more about
the Tamron 70-200mm f/2.8 Di LD Macro Pentax-k

Reasons to consider the Pentax DA* 50-135mm f/2.8 ED SDM

Has a silent focus motor Pentax SDM vs None
Help
Focuses quickly and silently
Shorter 136 mm vs 194 mm
Help
Around 30% shorter
Lighter 0.7 kg vs 1.1 kg
Help
Around 40% lighter
Slightly better wide angle 50 mm vs 70 mm
Help
Around 30% better wide angle
Slightly smaller diameter 76 mm vs 90 mm
Help
Around 20% smaller lens at the end
Pentax SMC  DA* 50-135mm f/2.8 ED SDM Learn more about
the Pentax DA* 50-135mm f/2.8 ED SDM

similarities

Compared to lenses

Common Strengths Common Weaknesses
Fixed aperture Constant aperture lenses Help
The same aperture at all focal lengths
Prime lens Both are zoom lenses Help
Typically not as sharp as prime lenses

Compared to sports lenses

Common Strengths Common Weaknesses
Weight Light weight Help
70-200mm f/2.8 Di LD Macro Pentax-k:1.1 kg
DA* 50-135mm f/2.8 ED SDM:0.7 kg
Min focal length Good wide-angle Help
70-200mm f/2.8 Di LD Macro Pentax-k:70 mm
DA* 50-135mm f/2.8 ED SDM:50 mm
Lowest price Inexpensive Help
70-200mm f/2.8 Di LD Macro Pentax-k:$729.00
DA* 50-135mm f/2.8 ED SDM:$1,396.95
Image stabilization No image stabilization Help
Risk of blur

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

Max focal length Has a slightly shorter telephoto lens
Zoom range Has slightly large zoom range
Aperture Has a narrower aperture
Fixed aperture Has a variable aperture
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

Aperture Has a narrower aperture
Fixed aperture Has a variable aperture
Pentax SMC 60-250mm f/4 ED DA* SDM

Pentax SMC 60-250mm f/4 ED DA* SDM

Wildlife lens

$1,397

Aperture Has a narrower aperture
Sigma 70-200mm f/2.8 II EX DG APO Macro HSM Pentax-k

Sigma 70-200mm f/2.8 II EX DG APO Macro HSM Pentax-k

Sports lens

$799

Length Is longer
Weight Is heavier
Sigma 70-200mm f/2.8 EX DG APO OS HSM

Sigma 70-200mm f/2.8 EX DG APO OS HSM

Sports lens

$1,249

Image stabilization Has image stabilization
Weight Is heavier

Tamron 70-200mm f/2.8 Di LD Macro Pentax-k Competitors

Advantages

Disadvantages

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

Length Shorter
Max focal length Better telephoto
Fixed aperture Has a variable aperture
Wide maximum Significantly wider aperture
Olympus Zuiko 50-200mm f/2.8-3.5 ED SWD

Olympus Zuiko 50-200mm f/2.8-3.5 ED SWD

Wildlife lens

$1,199

Focus motor Has a silent focus motor
Length Shorter
Fixed aperture Has a variable aperture
Wide maximum Significantly wider aperture
Sigma 200-500mm f/2.8 EX DG APO IF Nikon-f

Sigma 200-500mm f/2.8 EX DG APO IF Nikon-f

Sports lens

$28,999

Max focal length Much better telephoto
Lowest price Much more expensive
Weight Much heavier
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

Length Shorter
Max focal length Better telephoto
Fixed aperture Has a variable aperture
Wide maximum Significantly wider aperture

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

Advantages

Disadvantages

Nikon Nikkor AF-S DX VR 55-200mm f/4-5.6G IF-ED

Nikon Nikkor AF-S DX VR 55-200mm f/4-5.6G IF-ED

Wildlife lens

$247

Image stabilization Image stabilization
Lowest price Cheaper
Fixed aperture Has a variable aperture
Aperture Narrower aperture
Nikon Nikkor AF-S 70-200mm f/2.8G ED VR II

Nikon Nikkor AF-S 70-200mm f/2.8G ED VR II

Sports lens

$2,397

Image stabilization Image stabilization
Max focal length Better telephoto
Length Longer
Weight Heavier
Sigma 50-150mm f/2.8 II EX DC HSM Pentax-k

Sigma 50-150mm f/2.8 II EX DC HSM Pentax-k

Sports lens

$749

Lowest price Slightly cheaper
Max focal length Slightly better telephoto
Canon EF 70-200mm f/2.8L IS USM

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

Sports lens

$1,899

Image stabilization Image stabilization
Wide maximum Significantly narrower aperture
Length Longer
Weight Heavier
Rokinon 85mm f/1.4 Pentax-k

Rokinon 85mm f/1.4 Pentax-k

Sports lens

$269

Prime lens Is a prime lens
Aperture Significantly wider aperture
Auto focus Auto focus
Focus motor Doesn't have a silent focus motor

discussion Which do you think is better?

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