YS-90TTL Duo Strobes
All the features of the YS-60 combined with cordless TTL and a user changeable sync cord make this the perfect primary or second
YS-90 Duo is the perfect primary strobe. Its cordless TTL function makes it the perfect secondary strobe. The changeable sync cord allows this flash to be used with almost all underwater systems. Loaded with Sea & Sea's technology and quality the YS-90 Duo is one of the most versatile underwater flash units available. YS-90 Duo can be used for all applications including wide-angle and macro photography. It includes the Sea & Sea prismatic diffuser in front of the flash tube to create even higher intensity light in an even oval pattern. The colour temperature is close to that of the sun (5,400°K) and provides a natural colour tone for photography even in dark water. YS-90 Duo's built-in Duo circuit responds to N-type (used in MMIII) and S-type TTL circuits, both used in Sea & Sea housings. Moreover, its TTL slave function enables cordless dual TTL photography, requiring only the master strobe to be cabled to the camera. The guide number is 22 (land). It has 2-step (1/2 and full) light level control. Use of the accessory diffuser softens the light and helps reduce backscatter. The accessory diffuser reduces the light output by one f-stop, combined with the power control to give 4 stops of control. Alkaline batteries will provide 200 full flashes over their lives at a recycle time of 6.5 seconds. It gets ready almost immediately after a TTL flashing, so you won't miss the chance.
