topic Re: Lens Adapter for Older Sigma Lens in Camera Accessories

Lens Adapter for Older Sigma Lens on EOS R50

kg4kpg — Sat, 13 Jun 2026 14:08:37 GMT

A friend gave me this older Sigma lens and I’m trying to see if there is an adapter to put this in my R50. I picked one up but it wasn’t the right one, so hoping someone could advise. Thanks

Re: Lens Adapter for Older Sigma Lens

deebatman316 — Sat, 13 Jun 2026 01:06:38 GMT

It will not be worth your time adapting that lens to the RF Mount. That lens looks like it could be Canon’s older FD Mount for manual focus SLRs. Everything will be manual and no kind of automation.

Re: Lens Adapter for Older Sigma Lens

MikeSowsun — Sat, 13 Jun 2026 02:21:35 GMT

Yes, that is a Sigma lens with a Canon FD mount. You woud need an FD to RF mount adapter.

Re: Lens Adapter for Older Sigma Lens

shadowsports — Sat, 13 Jun 2026 02:56:45 GMT

Greetings,

My recommendation is don't do it. Don't even try. That lens is a museum piece. If you want a Sigma lens for your R50, grab the RF 16-300. 👍

Re: Lens Adapter for Older Sigma Lens on EOS R50

ebiggs1 — Sat, 13 Jun 2026 14:45:39 GMT

Well not to beat a dead horse but I also advise not trying to adapt it to anything current even a DSLR. I am sure somebody makes an adapter but even if you find one the result you get will be terrible. CA will be off the charts for one thing. (ask me how I know!) 😬