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The move follows on from the launch of the dp2 Quattro earlier this year.

The dp1 Quattro carries a Foveon X3 direct image sensor, designed to deliver an equivalent resolution of 39 million pixels.

The magnesium-bodied camera features a manual focusing ring, built-in raw file processing and a claimed burst rate of seven frames per second.

It is due to arrive in the UK in October, at a price yet to be announced.

Sigma will also use Photokina to showcase some new lenses.

These include a 150-600mm f/5-6.3 DG OS HSM; and a 18-300mm f/3.5-6.3 DC Macro OS HSM.