Filters, damned filters
When I was in my young twenties I received a used Nikon with all paraphernalia as a gift. It was love at first sight, I've never recovered from the photography bug. There were 5 different lenses and other mysterious gadgets, and a big learning curve. I loved it. I think it weighed about 3 pounds, and went all over the world with me until the light meter died once and for all and I went to a newer model. It had been frozen, wet, dropped, lost and recovered, cooked in the summer heat, and took thousands of entirely unique pictures. That camera did have a life and personality of its own.