Sigma Lens Code

[deeky]

I am looking at a new lens for my Canon. I am looking at a Sigma that includes a code of "SLD". I have looked at a couple of resources and have found most of the codes, but can't find an interpretation of the SLD.

Any help?

Thanks.

 

[Rob99]

Special Low Dispersion

 

[deeky]

Makes sense. Thanks.