Image on top shows the old and legendary Sigma 18-35mm f/1.8 lens .

On June 17 Sigma will announce the new 12mm f/1.4 and 17-40mm f/1.8 E-mount APS-C lenses. Here are more detailed specs about this new fast zoom lens.

17-40mm f/1.8 E

• uses aspherical elements made of SLD (Super Low Dispersion) glass
• manufactured with advanced polishing technology to minimize chromatic aberration, flare, distortion
• Aperture ring, with declick
• sealed against dust and splashes
• excellent sharpness from corner to corner already at f/1.8
• HLA (High-response Linear Actuator) autofocus motor (fast, silent and accurate)
• excellent control over focus breathing
• Internal Zoom
• Size: 115.9mm long, maximum diameter 72.9mm
• 67mm filter
• weight: 535g
• Shipment start in July

So this lens is 5mm shorter, 5mm narrower and 275g lighter than the Sigma 18-35mm f/1.8 lens . And this despite it having 1mm more at the wide end and 5mm more reach at the tele end. Impressive!

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via Fujirumors