Two Extension tubes, in the same 12mm and 25mm lengths as previously available, have been redesigned to accommodate the EF-S mount lenses and its extended rear elements.
Note that exposure compensation is often required with cameras other than the EOS-1 Series.
• Retains all metering and AF functions with most CANON EF lenses.
• High level water and dust resistance -- suitable for use in heavy rain.
• O-ring seals protect mounts and release lever.