Now this one is really easy . All you need is a door viewer , a piece of tape and of course your camera!
To buy a door viewer you can just go to the hardware store and they should have them . They come with different angles . The bigger the angle , the funnier the picture !! Mine has got an angle of 200 degrees . You shouldn’t pay more than a few dollars .
Once you got your door viewer , all you have to do is pull or screw it apart ( it consists of two parts ) , place the part with the lens right in the middle of your Diana camera lens and fix it with some tape . It makes no difference what kind of tape you choose , it can either be clear one or any kind of black or white tape .
You can now shoot some really blurred & unique photos !!