The GR-D is an interesting little camera. There are two adaptors in that photo, one which gives me a 21mm FOV and one 40mm. The filters are a circular polariser (for reducing reflections from haze and water) and two ND filters which are to allow me use lower shutter speeds with wide apertures - one of the constraints on small sensor cameras is that diffraction starts reducing the sharpness of the lens at small apertures, so the GR-D is limited to f9. There's also an IR filter in there that I bought during the week and haven't had a chance to experiment with yet.

The quality of the lens is very, very good and the sensor isn't bad for what it is: I can get usable B&W shots from ISO800 in a camera that will fit in a jeans pocket.

The controls are nice too - there's a dial on the front for aperture control and a rocker on the back that can be used for shutter speed, manual focus that's usable, instant access to exposure compensation and quick access to things like changing ISO or focus mode. There's a nice macro mode too.

The hotshoe on top means that you can use optical viewfinders to frame the shots, which means, when combined with snap focus mode (preset to about 2.5m with huge depth of field), you can frame and shoot pictures very quickly for street or informal photography.

It also does some nice landscape work.

Lot's of constraints on it, of course, but I like constraints - they make it easier for me  to get good results because they impose a discipline upon what I'm doing.