Extension tubes
Photographers use extension tubes for macro photography. They are available from many different manufacturers for the Canon DSLR. They are a less expensive alternative to dedicated macro lenses that can cost two times the price of a regular lens. An extension tube increases the image size by creating distance between the lens and the sensor of the camera. The EF25 and the EF12 are the two types of extension tubes made by Canon. While the extension tubes are not without limitations, they do provide some interesting effects and are a good alternative for those looking to try their hand at macro photography.
Instructions
1. Connect the extension tube to the Canon DSLR body by aligning the red dot on the extension tube with the red dot on the camera body. Turn the extension tube until it locks into place.
2. Connect the camera lens to the extension tube that is on the Canon DLSR body by aligning the red dot on the lens with the red dot on the camera body. Turn the lens until it locks into place.
3. Switch the camera on. You can now start trying to focus the lens onto a subject that you want to take close up. Practice first on nonmoving objects such as flowers. Sometimes the autofocus will not work, and you will need to switch to manual focus to help you focus on an image.
Tags: extension tube, body aligning, body Turn, camera body, camera body Turn