I have been into cars and drag racing for quite a few years, i've recently just sold a race engine and a couple of very large turbos, I have then got into photography, started with a box brownie...have just bought a 5x4 speed graphic lol anyway this is how you need to put it:

"Which would you rather me being interested in cars with loads of expensive oily car parts cluttering up the place since we have no garage, or a nice neat high quality camera that will only go up in value that will sit on the shelf out the way?"

At this point you then ask if she wants a tea or coffee and go put the kettle on I'm quite lucky in the fact that I have asked the wife to be if i'm allowed a dark room in our house we are looking to buy next year and i've been allowed lol