IKELITE ZOOM GEAR FOR SONY 16-70MM, SIGMA 17-70MM allows you to operate the zoom function of your camera lens inside the lens port mounted on your Ikelite underwater housing. 

LENS COMPATIBILITY:

• Sigma 17-70 mm f/2.8-4 DC Macro OS HSM
• 17-28 mm Tamron f/2.8 Di III RXD E-Mount
• 16-70 mm Sony f/4 ZA OSS Vario-Tessar T* E SEL1670Z