[300V]

extension tube what is that ??
is that for marco photo ??
if i am use 20D kit lens +extension tube have another thing to add ma??
pls help thanks....

[pingu_hk]

extension tube for macro, china made, $70 for 4 rings, extension ring is a solution for macro at the cheapest price

If u wanna shoot with controlled aperature on your lens
1. mount the lens without the extension ring
2. set the aperature, e.g. 11
3. step down the aperature * by holding the "depth of field preview" button near the lens mount
4. do not turn off the camera, while holding the dof preview button, unmount the lens, the lens will be removed with the aperature set at the desired f11
5. mount the lens with the extension ring to the camera
6. focus by moving your body front & back

ENJOY!

(to get sharp image, u must use a tripod or use the flash)