Hey, thanks Diana :) In order to stop light from entering the camera, you need to use a natural density filter. You can get them darker or lighter, I used one, that darkens the light by 10 stops. To the naked eye it is basically completely black, but it does let in some light, so that allows me to do longer exposures daytime. :) For some of the photographs in this gallery the exposures are over 4 minutes, but mostly around 30 secs :) P. s. Good ND filters start at £50, so dont get one cheaper then that, or your photos will lose quality.