Sigma released Firmware Update 1.25 for their MC-11 EF-E Mount Converter which adds compatibility for Sigma 120-300mm F2.8 DG OS HSM Sports EF lens and improved AF speed of Sigma 135mm F1.8 DG HSM Art EF lens when used in combination with Sony a9 or Sony a7 III.
Please Note: Sony a9 users should update their camera firmware to Ver.5.00 or later
Download Sigma MC-11 Firmware
5 thoughts on “Sigma Releases MC-11 Firmware Update 1.25”
Why isn’t a similar firmware available for Sigma’s “native” Sony mount 135mm f1.8 lens? Isn’t MC-11 equivalent built-in in that lens?
The native Sigma FE doesn’t need it. The update is aimed at improving the adapted lens. Even if Sigma tries to fool you by calling it a “Mount Converter”, MC-11 is an adapter.
Ah, I see…Thank you!
Been using the MC-11 on a A7RIII | Canon 400 f2.8L Mark I combo for about 4 months. I am getting mixed results. I have the latest firmware on both. My question is… I have read that the MC-11 is capable a much better results on Sigma EF glass and AF-C is nearly native on the newer Sigma lenses (Art and Sport). I’ve read that when the MC-11 is connected to Canon glass it operates in LA-EA3 mode and the frame rate drops as does the AF-C performance. So is that a restriction that Sigma is placing on the MC-11 or something Sony is doing?
Ever speak in a foreign language country where half the people speak your language and the other half listen through a translator?
The jokes get delayed laughs from half the crowd.
Kinda like that.
But even Sigma admits that MC-11 adapted Sigma EF lenses are NOT the same as native glass.