Number or digital cameras and lenses you need is n+1, where n is the number of cameras you already have. ;)
You can support my work buying anything from Amazon by using these links below before shopping. You will not pay more than otherwise, but I get a small percentage from every purchase.
Amazon USA: amzn.to/1MrBiCQ
Amazon UK: goo.gl/WdQ5rN
Amazon Canada: goo.gl/8FjrKq
Amazon Deutschland: goo.gl/jCMDsN