We are often asked should I get HD or SD when I choose my underwater video camera. In general most “recreational” users are still choosing SD when it comes to there system. HD is a great option for universities studying small creatures, TV Productions and Other data that needs to have great detail. Our SD cameras have very high resolutions as well and you can keep the cost down a bit. As with any and all of your questions please feel free to contact us anytime. 1-800-355-4234 or 425-258-0778.