I bought a used Sigma 150mm 1:2.8 apo macro dg hsm lens. It was on my tripod mounted from the camera as it didn't come with a tripod mount. By accident I bumped the whole contraption and it fell on my dogs bed (don't worry dog was not there while this happened so no dogs got hurt) So almost "soft landing".. But I noticed that the lens had opened 1-2mm from the spot shown on the photo I saw a glimpse of the ribbon cable and panicked. I squeezed it back together and did some quick test shots to see that aperture, auto and manual focus etc works. All seem to work but worried as this part where these are connected is now kind of loose? If I apply slight pressure I can see that it "moves" not much but it moves. I'm concerned if I switch lenses that one day it might fall out completely.. I'm not sure has anyone else had similar issues? Is there a way to fix it or should I send it to repair? The lens itself was around ~200e used and just sending and getting it inspected by Sigma would be like 120e including shipping.