Kenko DG Extension Tube Set for Canon EF/EF-S lens mount_Sony E Breakthough Photography calls this an

Breakthough Photography calls this an "X2" filter

It has autofocus capabilities for compatible Pentax cameras

Canon EF 65mm f2

The Gossen Lunasix 3 is a good quality meter with excellent low light sensitivity and an easy to read dial

with an easy to use aperture ring with click stops

Kenko DG Extension Tube Set for Canon EF/EF-S lens mount_Sony E Breakthough Photography calls this anA set of three extension tubes for Canon EF EF S mount: 12mm, 20mm, and 36mm. These tubes have the electronic contacts necessary to maintain autofocus and autoexposure capabilities. If you're curious about dabbling in macro work, this is an inexpensive way to get started.