I am a beginner photographer and owner of the now obsolete Sony NEX 5-R mirrorless camera (bought in 2012). It has been 1) increasingly saying "cannot recognize lens" and 2) seems to have a really hard time auto-focusing, especially when I use the zoom in low lighting.
I have repeatedly wiped down the contacts, which helps temporarily with problem #1, although the "cannot recognize lens" message does continue to randomly pop up.
However, I have no idea what I should be doing for problem #2. Is this just a matter of cleaning something? Or getting it serviced? Or is my old camera finally dying its slow death?