Lens convertor. (1 Viewer)

Hi all, I have a Sigma 70-300mm APO DG lens and was wondering what lens convertors would fit it if any?

Many Thanks.

It's a decent lens and whilst a converter may give decent results, when used with any zoom lens results can be rather soft. Used with prime lenses they're oaky, but very few zoom lens with a converter give sharp results. At most I'd try a 1.4x converter, but I don't have this lens so I don't know if it would be worth buying one. It may be worth checking out the Sigma forum and posting the query there.

Thanks Ian for your response. I have looked in the Sigma forum and found quite a few answers.

Thanks again.