Even with a fish eye lense a snoot can be helpful to lighten up a colourful object on the foreground without disturbing the natural lighting of the background. In this indoor test I used a self made 15 cm long snoot with a front opening of 5 cm made of plastic piping. The snoot was placed on an Ikelite DS 125 strobe set at the lowest intensity. Pictures were taken with the Olympus EPL5 and the Panasonic 8mm fish eye. Single strobe at the left upper corner at a 40 cm distance, ISO 250, shutter speed 1/125, @ f5.6. The three pictures below show the shots without and with strobe, and the snoot on the strobe respectively. Notice that the lighting of the underexposed background is not affected by the snooted strobe. Meaning that this might also work in UW settings like caverns, when you want to add some extra colour like the branche of a sea fan or so, without spoiling the nice natural lighting of the interior.
