A special zoom sleeve for use with the Canon 10-18mm STM lens
when used with the Canon EOS 100D Rebel SL1 in our Compact DSLR Housing.
The full zoom range of the lens is accommodated by the housing's
standard dome port without vignetting (dark shadows in the corners of
the image).
This zoom gear is not necessary to use the Canon 10-18mm STM lens
with any other model of Ikelite DSLR housings. Refer to the appropriate
Lens Port Chart to find the correct zoom gear.