‘Our goal is to provide more freedom for photographers to select new camera bodies without the worry of having to discard their lens collection,’ states Sigma’s UK website.

‘Sigma wants to help you keep those lenses for a long time no matter what camera system you’re using, and can now change the mount of your lens by adjusting it to fit a change in your desired camera system.’

It will not be possible to convert to a mount that Sigma has not release, adds the firm which says it will release further details shortly.

Sigma has not yet indicated how much the service, which is due to be launched on 2 September, is likely to cost.

Eligible lenses, as shown on Sigma Imaging UK’s website:

Interchangeable lenses for SLR / DSLR cameras (As of August, 2013)
35mm F1.4 DG HSM, 120-300mm F2.8 DG OS HSM, 30mm F1.4 DC HSM, 17-70mm F2.8-4 DC MACRO OS HSM / DC MACRO HSM. 18-35mm F1.8 DC HSM. Conversion available for: SIGMA, SONY, NIKON, PENTAX, CANON

Interchangeable lenses for Mirrorless cameras (As of August, 2013)
19mm F2.8 DN, 30mm F2.8 DN, 60mm F2.8 DN. Conversion available for: MICRO FOUR THIRDS, SONY E-mount.