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Tamron AF 28-80mm F3.5-5.6 Aspherical vs Sigma 24-70mm F2.8 EX DG Macro
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Tamron AF 28-80mm f3.5-5.6

Standard Zoom | Pentax KAF

Tamron AF 28-80mm F3.5-5.6 Aspherical

BUY from B&H PHOTO
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Sigma 24-70mm F2.8 EX DG

Standard Zoom | Pentax KAF

Sigma 24-70mm F2.8 EX DG Macro

BUY from B&H PHOTO
Reasons to choose Tamron AF 28-80mm F3.5-5.6 Aspherical over Sigma 24-70mm F2.8 EX DG Macro
Price $45 vs $750 Cheaper by $705
Focal Length - Tele 80mm vs 70mm 10mm more tele coverage
Weight 237 g vs 715 g 478 g lighter
Diameter 72 mm vs 89 mm 17 mm smaller in diameter
Length 70 mm vs 116 mm 46 mm shorter
Filter Thread 58 mm vs 82 mm Smaller filters are cheaper
Reasons to choose Sigma 24-70mm F2.8 EX DG Macro over Tamron AF 28-80mm F3.5-5.6 Aspherical
Focal Length - Wide 24mm vs 28mm 4mm wider coverage
Max Aperture - Wide 2.8 vs 3.5 faster lens at wide
Diaphragm Blades 9 vs 6 better Bokeh
Tamron AF 28-80mm f3.5-5.6 vs Sigma 24-70mm F2.8 EX DG Specs Table
Detailed comparison of specifications
General Tamron AF 28-80mm f3.5-5.6 Sigma 24-70mm F2.8 EX DG
Brand Tamron Sigma
Lens Type Zoom Zoom
Price $44.99 $750.00
Lens Type Standard Zoom Standard Zoom
Lens Mount Pentax KAF Pentax KAF
Max Format 35mm FF 35mm FF
Focal Range 28-80mm 24-70mm
Image Stabilization No No
Colour Black Unknown
Zoom Method Rotary (extending) Rotary (extending)
Power Zoom - -
Zoom Lock No -
Zoom Ratio 2.9X 2.9X
Aperture
Max Aperture F3.5 - F5.6 F2.8
Min Aperture F22.0 F32.0
Aperture Ring Yes No
Diaphragm Blades 6 9
Optics
Optical Elements 7 14
Optical Groups 7 13
Special Elements unknown 2 Special Low Dispersion (SLD) glass elements 3 aspherical elements
Focusing
Min Focus Distance 0.7m 0.4m
Max Magnification unknown 0.26X
Autofocus Yes Yes
AF Motor Type Micromotor Micromotor
Full Time Manual No
Focus Method Extending front Internal
Distance Scale Unknown Yes
DoF Scale Unknown Yes
Distance Scale Unknown Yes
Focus Distance Limiter Unknown Unknown
Physical Specs
Weight 237g 715g
Diameter 72mm 89mm
Length 70mm 116mm
Materials Unknown Unknown
Weather Sealing Unknown No
Filter Thread 58mm 82mm
Filter Notes - -
Hood Supplied Yes Yes
Hood Code Unknown Unknown
Tripod Collar No No
Optional Accessories - -
Report Report
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