This is our view from our balcony at night – in hearts.
Color Me Katie posted about making her own heart lens filter using black construction paper.
To make your own: trace your lens circumference on a piece of black construction paper and cut out. In the center of your circle, cut out a heart (or any other shape your want) so that it takes up about 1/3 of the center space. Proceed to hold this in front of your lens while shooting at a wide aperture and you will have instant heart vision.
I read that this is a technique only achieved with DSLR’s and lenses with an aperture around 1.8. Otherwise this may result in a heart vignette and not the above effect. I enjoyed experimenting with this technique.