30+ years.
Graduated college in 1978 and had two purchases planned after I started making money: a guitar and a camera. Bought both within a year. I sold the guitar last year, because I never used it anymore (a Takamine left-handed Martin copy). I still have the Olympus OM-1 with the 50/1.4. There's been a lot of film through that camera. About 1998, I started getting more lenses, more cameras, attachments, and accessories, and now I've got enough to start a business, I think, because it won't all fit in one closet.