This updated version II is now also fully compatible with Canon Digital EF-S lenses, as well as standard photo EF and TS-E lenses. Extension Tube EF 25 II is recommended for lenses with a focal length of 50mm and up (EF-S 18-55mm can be used at middle and tele zoom settings). Features: Shortens focusing distance of lens Canon EOS 600D Canon EF 50mm F1.8 II Canon EF 70-200mm F4L USM Tamron SP AF 10-24mm F/3.5-4.5 Di II LD Aspherical (IF) Sigma 24-70mm F2.8 EX DG HSM +2 more Reply Reply with quote Reply to thread Complain CALL TO ORDER1300 365 220. * Dispatch timeframes are indications only and may vary for multiple quantities. Timeframes are updated regularly during normal business hours. Canon Extension Tube EF 12 II - The Extension Tube EF 12 is installed between the prime lens and the camera body. It is a simple way to enable close-ups at high magnifications One of the biggest differences between the Canon EF 24-105mm f/4L IS USM and the Canon EF 50mm f/1.8 II is written in the name of the lenses themselves. It’s aperture. While the Canon EF 24-105mm f/4L IS USM can manage a valiant F/4, it doesn’t quite cut the mustard compared to the Canon EF 50mm f/1.8 II, opening up to an aperture of f/1.8. A9Uu.