Compare Sigma 17-70mm F2.8-4 DC Macro OS HSM | Contemporary vs Pentax HD Pentax-DA Fisheye 10-17mm F3.5-4.5 ED vs Tokina AT-X 10-17mm F3.5-4.5 DX Fisheye

[[{"Ft":"Construction","Fn":"Aperture Blades","Fv":"7 blades, rounded"},{"Ft":"Construction","Fn":"Form Factor","Fv":"Standard Zoom Lens"},{"Ft":"Construction","Fn":"Image Size","Fv":"APS-C"},{"Ft":"Construction","Fn":"Lens Barrel","Fv":"Distance scale"},{"Ft":"Construction","Fn":"Lens Mount","Fv":"Canon EF-mount, Nikon F-mount, Pentax K-mount, Sigma SA-mount, Sony A-mount"},{"Ft":"Construction","Fn":"Material","Fv":"Plastic barrel, metal mount"},{"Ft":"Construction","Fn":"Motor","Fv":"Micro-type ultrasonic"},{"Ft":"Construction","Fn":"Optical Formula | Elements","Fv":"16 elements"},{"Ft":"Construction","Fn":"Optical Formula | Groups","Fv":"14 groups"},{"Ft":"Construction","Fn":"Optical Formula | Special Glass","Fv":"2 FLD (\u0026#34;F\u0026#34; Low Dispersion) glass elements, 1 SLD (Special Low Dispersion) glass element, 3 aspherical glass lenses including double sided aspherical lens groups"},{"Ft":"Dimensions","Fn":"Filter Diameter","Fv":"72 mm / 2.83 in"},{"Ft":"Dimensions","Fn":"Size | Diameter","Fv":"79 mm / 3.11 in"},{"Ft":"Dimensions","Fn":"Size | Length","Fv":"82 mm / 3.23 in"},{"Ft":"Dimensions","Fn":"Weight","Fv":"465 g / 16.43 oz"},{"Ft":"Function","Fn":"Angle Of View","Fv":"80.7° Diagonal | 70.4° Horizontal | 50.4° Vertical (wide) ~ 23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (tele)"},{"Ft":"Function","Fn":"Aperture","Fv":"f/2.8–4 ~ f/22"},{"Ft":"Function","Fn":"Autofocus","Fv":"Yes"},{"Ft":"Function","Fn":"Crop Factor","Fv":"1.5"},{"Ft":"Function","Fn":"Focal Length","Fv":"17 mm ~ 70 mm"},{"Ft":"Function","Fn":"Focal Length (35mm Equivalent)","Fv":"25.5 mm ~ 105.0 mm"},{"Ft":"Function","Fn":"Focus Type","Fv":"Internal"},{"Ft":"Function","Fn":"Image Stabilization","Fv":"Yes"},{"Ft":"Function","Fn":"Zoom Type","Fv":"External zoom"},{"Ft":"Performance","Fn":"Max Magnification","Fv":"0.36x"},{"Ft":"Performance","Fn":"Min Focus Distance","Fv":"220 mm / 8.66 in"},{"Ft":"Production","Fn":"Accessory","Fv":"Lens Hood: LH780-03 (supplied)"},{"Ft":"Production","Fn":"Debut","Fv":"2012-09-17"},{"Ft":"Production","Fn":"Made In","Fv":"Japan"}],[{"Ft":"Construction","Fn":"Aperture Blades","Fv":"6 blades"},{"Ft":"Construction","Fn":"Colors","Fv":"Black"},{"Ft":"Construction","Fn":"Form Factor","Fv":"Ultra Wide-Angle Zoom Lens"},{"Ft":"Construction","Fn":"Image Size","Fv":"APS-C"},{"Ft":"Construction","Fn":"Lens Barrel","Fv":"Distance scale"},{"Ft":"Construction","Fn":"Lens Mount","Fv":"Pentax K-mount"},{"Ft":"Construction","Fn":"Motor","Fv":"Screw drive from camera"},{"Ft":"Construction","Fn":"Optical Formula | Elements","Fv":"10 elements"},{"Ft":"Construction","Fn":"Optical Formula | Groups","Fv":"8 groups"},{"Ft":"Construction","Fn":"Optical Formula | Special Glass","Fv":"ED element, HD + Super Protective coatings groups"},{"Ft":"Dimensions","Fn":"Size | Diameter","Fv":"68 mm / 2.68 in"},{"Ft":"Dimensions","Fn":"Size | Length","Fv":"70 mm / 2.76 in"},{"Ft":"Dimensions","Fn":"Weight","Fv":"317 g / 11.20 oz"},{"Ft":"Function","Fn":"Angle Of View","Fv":"180° Diagonal (wide) ~ 100° Diagonal"},{"Ft":"Function","Fn":"Aperture","Fv":"f/3.5–4.5 ~ f/22–32"},{"Ft":"Function","Fn":"Autofocus","Fv":"Yes"},{"Ft":"Function","Fn":"Crop Factor","Fv":"1.5"},{"Ft":"Function","Fn":"Focal Length","Fv":"10 mm ~ 17 mm"},{"Ft":"Function","Fn":"Focal Length (35mm Equivalent)","Fv":"15.0 mm ~ 25.5 mm"},{"Ft":"Function","Fn":"Focus Type","Fv":"Internal"},{"Ft":"Function","Fn":"Weather Resistance","Fv":"No"},{"Ft":"Function","Fn":"Zoom Type","Fv":"External zoom"},{"Ft":"Performance","Fn":"Max Magnification","Fv":"0.39x"},{"Ft":"Performance","Fn":"Min Focus Distance","Fv":"140 mm / 5.51 in"},{"Ft":"Production","Fn":"Accessory","Fv":"Lens hood included"},{"Ft":"Production","Fn":"Debut","Fv":"2019-07-08"}],[{"Ft":"Construction","Fn":"Aperture Blades","Fv":"6 blades"},{"Ft":"Construction","Fn":"Colors","Fv":"Black"},{"Ft":"Construction","Fn":"Form Factor","Fv":"Ultra Wide-Angle Zoom Lens"},{"Ft":"Construction","Fn":"Image Size","Fv":"APS-C"},{"Ft":"Construction","Fn":"Lens Barrel","Fv":"Distance scale, DoF scale"},{"Ft":"Construction","Fn":"Lens Mount","Fv":"Canon EF-mount, Nikon F-mount"},{"Ft":"Construction","Fn":"Motor","Fv":"Screw drive from camera"},{"Ft":"Construction","Fn":"Optical Formula | Elements","Fv":"10 elements"},{"Ft":"Construction","Fn":"Optical Formula | Groups","Fv":"8 groups"},{"Ft":"Construction","Fn":"Optical Formula | Special Glass","Fv":"SD element groups"},{"Ft":"Dimensions","Fn":"Size | Diameter","Fv":"70 mm / 2.76 in"},{"Ft":"Dimensions","Fn":"Size | Length","Fv":"71 mm / 2.80 in"},{"Ft":"Dimensions","Fn":"Weight","Fv":"350 g / 12.37 oz"},{"Ft":"Function","Fn":"Angle Of View","Fv":"180° Diagonal ~ 100° Diagonal (fisheye)"},{"Ft":"Function","Fn":"Aperture","Fv":"f/3.5–4.5 ~ f/22"},{"Ft":"Function","Fn":"Autofocus","Fv":"Yes"},{"Ft":"Function","Fn":"Crop Factor","Fv":"1.5"},{"Ft":"Function","Fn":"Focal Length","Fv":"10 mm ~ 17 mm"},{"Ft":"Function","Fn":"Focal Length (35mm Equivalent)","Fv":"15.0 mm ~ 25.5 mm"},{"Ft":"Function","Fn":"Focus Type","Fv":"Extending front"},{"Ft":"Function","Fn":"Image Stabilization","Fv":"No"},{"Ft":"Function","Fn":"Weather Resistance","Fv":"No"},{"Ft":"Performance","Fn":"Min Focus Distance","Fv":"140 mm / 5.51 in"},{"Ft":"Production","Fn":"Accessory","Fv":"Lens Hood: built-in hood (supplied)"},{"Ft":"Production","Fn":"Debut","Fv":"2011-06-12"}]]