Sigma 2x teleconvertor with Sigma 50-100mm f1.8 Art lens?

[Stan27y]

Hi, does anyone know if it is possible (firmware update etc?) to make this pairing work?

Would appreciate any help.

Thanks.

 

[kandinsky]

Found this stated in a review:

Sigma does not list the 50-100 f/1.8 as being compatible with their teleconverters, but Sigma teleconverters will mount behind this lens. Unfortunately, AF does not work with these combinations. Using a Canon EOS 7D Mark II, the mounted 1.4x and 2x combinations continuously hunted for focus.

http://www.the-digital-picture.com/Reviews/Sigma-50-100mm-f-1.8-DC-HSM-Art-Lens.aspx

 

[Ah Keong]

in a nutshell, the AF does not work.

 

[Stan27y]

Sad. Thanks for the info