Olympus are the only camera manufacturer to supply underwater housings for their digital SLR cameras, a full range of accessories are also available including lens ports and strobe systems. If you don't own an Olympus SLR then Ikelite or Fantasea is sure to have a housing to suit your model, again a full range of accessories are available.
Ewa Marine SLR housings are suitable for all types of SLR cameras and can accommodate motor drives, zoom lenses and flashguns. Despite being light weight (approx 400g) Ewa Marine housings are very strong, being made from double laminated PVC with welded seams. All housings have a flat optical glass port, which can be used without vignetting with lenses of 28mm or longer.
Ikelite are one of the world's largest producers of underwater housings and are popular with divers, both amatuer and professional. Ikelite produce underwater housings for Canon, Nikon, Olympus, Sony and Fuji digital SLR cameras and a range of lens ports which will accomodate most lenses. All Ikelite SLR housings have TTL electronics built into them which means great exposures with a compatible strobe.