Canon EF25 II Extension Tube.

item used just a couple of times almost as new
include original box
no pouch
no caps

The Canon EF 25mm Extension Tube II is used to allow a lens to focus closer than it would normally. This is plished by moving the lens 25mm farther away from the camera body's film plane or digital sensor by fitting between the camera body and the lens. Extension tubes are monly used for macro photography and sometimes for closeup portraits and when using the camera's TTL metering system, no pensation will be required. This updated version II is now also patible with Canon Digital EF-S mount, as well as standard photo EF and TS-E fittings. Extension Tube EF 25 II is mended for focal lengths of 50mm and up (EF-S 18-55mm can be used at middle and tele zoom settings).

The Key Features

Shortens focusing distance of lens
Compatible with digital EF-S, EF, and TS-E lenses

Canon produces tubes in two different lengths - 12mm and 25mm. The EF12 and EF25 e with electrical contacts which allow data transfer between the lens and camera to be maintained. It is possible to attach the EF12 tube to the EF25 tube to give a 37mm extension. Canon does not mend this, as the data transfer may be affected, but acceptable results are possible if you are willing to experiment.
Compatibility

EF 600mm f/4L IS USM
EF 500mm f/4L IS II USM
EF 500mm f/4L IS USM
EF 400mm f/5.6L USM
EF 400mm f/4 DO IS II USM
EF 400mm f/4 DO IS USM
EF 400mm f/2.8L IS III USM
EF 400mm f/2.8L IS II USM
EF 400mm f/2.8L IS USM
EF 300mm f/4L IS USM
EF 300mm f/2.8L IS II USM
EF 300mm f/2.8L IS USM
EF 200mm f/2.8L II USM
EF 200mm f/2L IS USM
EF 135mm f/2.8 softfocus
EF 135mm f/2L USM
EF 100mm f/2 USM
EF 85mm f/1.8 USM
EF 85mm f/1.4L IS USM
EF 85mm f/1.2L II USM
EF 50mm f/1.8 STM
EF 50mm f/1.8 II
EF 50mm f/1.4 USM
EF 50mm f/1.2L USM
EF 28mm f/2.8
EF 28mm f/2.8 IS USM
EF 28mm f/1.8 USM
EF 28–135mm f/3.5–5.6 IS USM
EF 24mm f/2.8
EF 24mm f/2.8 IS USM
EF 28–105mm f/3.5–4.5 II USM
EF 24–105mm f/3.5-5.6 IS STM
EF 24–105mm f/4L IS USM
EF 40mm f/2.8 STM
EF 35mm f/2
EF 35mm f/2 IS USM
EF 35mm f/1.4L II USM
EF 35mm f/1.4L USM
EF 24–70mm f/4L IS USM
EF 24–70mm f/2.8L II USM
EF 24–70mm f/2.8L USM
EF 20–35mm f/3.5–4.5 USM
EF 17–40mm f/4L USM
EF 16–35mm f/4L IS USM
EF 16–35mm f/2.8L II USM
TS-E 135mm f/4L Macro
TS-E 90mm f/2.8L Macro
TS-E 90mm f/2.8
TS-E50mm f/2.8L Macro
TS-E 24mm f/3.5L II
EF 180mm f/3.5L Macro USM
EF 100mm f/2.8L Macro IS USM
EF 100mm f/2.8 Macro USM
EF 50mm f/2.5 Compact Macro
EF 800mm f/5.6L IS USM
EF 600mm f/4L IS III USM
EF 600mm f/4L IS II USM
EF 28–300mm f/3.5–5.6L IS USM
EF 28–300mm f/3.5–5.6L IS USM
EF 70–200mm f/2.8L IS II USM
EF 70–200mm f/2.8L IS III USM
EF 70–200mm f/2.8L USM
EF 70–200mm f/4L IS USM
EF 70–200mm f/4L IS II USM
EF 70–200mm f/4L USM
EF 70–300mm f/4–5.6 IS USM
EF 70–300mm f/4–5.6 IS II USM
EF 70–300mm f/4–5.6L IS USM
EF 70–300mm f/4.5–5.6 DO IS USM
EF 75–300mm f/4–5.6 III USM
EF 75–300mm f/4–5.6 III
EF 100–400mm f/4.5 – 5.6L IS II USM
EF 100–400mm f/4.5 – 5.6L IS USM
EF 200–400mm f/4L IS USM Extender 1.4x
EF-S 17–85mm f/4–5.6 IS USM
EF-S 18–55mm f/3.5–5.6 IS II
EF-S 18–55mm f/3.5–5.6 IS STM
EF-S 18–55mm f/4–5.6 IS STM
EF-S 18–55mm f/3.5–5.6 III
EF-S 18–135mm f/3.5–5.6 IS STM
EF-S 18–135mm f/3.5–5.6 IS USM (nano)
EF-S 18–135mm f/3.5–5.6 IS
EF-S 18–200mm f/3.5–5.6 IS
EF-S 24mm f/2.8 STM
EF-S 35mm f/2.8 Macro IS STM
EF-S 60mm f/2.8 Macro USM
EF-S 55–250mm f/4–5.6 IS
EF-S 55–250mm f/4–5.6 IS II
EF-S 55–250mm f/4–5.6 IS STM