Why did my lens lose ability to focus?
Why did my lens lose ability to focus? I bought a used lens from KEH. The tamron 90mm f/2.8 macro (model f004). I used it for a while with no problems. I keep it in a dedicated camera bag and take very good care of my gear. I mainly use manual focus for macro work. I’ve used autofocus in the past and it’s worked perfect. But one day I tried to use autofocus and it didn’t work. I coul...