Canon EF 12 II Extension Tube For
EOS Digital Cameras
As Good As A Macro Lens (Almost)
CANON EF Extenders increase the power and versatility of existing
lenses. EF Extenders work by increasing the distance between the film
plane (or CCD) and the rear element of the lens. The extra distance
increases the effective focal length of the lens to bring distant subjects
closer.
Personal Review: Canon EF 12 II Extension Tube For EOS
Digital Cameras
Pros:
You can get much closer
Works with both EF-S and EF lenses
Auto focus still functions perfectly
Takes up very little room in your camera bag
Item looks about 3 times as large in photo using 17-40 Canon F/4 Lens
Cons:

A little tight to put on and take off of lens
Can no longer focus very far away let alone infinity
Review:
I purchased this Extension tube so I could take better Macro photos
without having to purchase an expensive Macro lens. I've got so many
lenses already.
I installed the tube between my Canon Rebel XTi and Canon 17-40 F/4 L
lens and bang!!! Instant macro lens.
A photo I had taken without the tube of a penny using the Canon 17-40
zoomed to 40mm gave a so so image. Putting the tube on allowed me to
focus so close the penny filled almost the entire view finder. Looking at the
penny image taken with the tube you can see little details I never noticed
before like each and ever step and little details like the little FG on the
lower right corner on the back of the penny.
Verdict:
I highly recommend it's worth every penny!!!
For More 5 Star Customer Reviews and Lowest Price:
Canon EF 12 II Extension Tube For EOS Digital Cameras 5 Star Customer Reviews and
Lowest Price!