 In September 2018, Sigma announced that they will stop the development of SA-mount cameras and focus on the Leica L-mount, as members of the L-Mount Alliance alongside Panasonic.M42-mount lenses can be mounted via adapters utilizing the SA inner bayonet.Despite of the physical similarities Pentax K-mount (PK) lenses can't really be fitted straight onto the SA-mount as well, once the protruding AA lever and AA protector outcrop are removed, though the fit is slightly loose as the SA-mount has a slightly bigger bore than the PK-mount.