Extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance.
Designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure with Canon EOS SLRs
Tube length: 25mm
1 Year Opteka Warranty
Extension tubes are designed to enable a lens to focus closer than its normal set minimum focusing distance. Getting closer has the effect of magnifying your subject (making it appear larger in the viewfinder and in your pictures). They are exceptionally useful for macro photography, enabling you to convert almost any lens into a macro lens at a fraction of the cost while maintaining its original optical quality. Extension tubes have no optics. They are mounted in between the camera body and lens to create more distance between the lens and film plane. By moving the lens father away from the film or CCD sensor in the camera, the lens is forced to focus much closer than normal. The greater the length of the extension tube, the closer the lens can focus. Opteka's 25mm Auto Focus extension tube is designed with all the circuitry and mechanical coupling to maintain auto focus and TTL auto exposure.
Most Helpful Customer Reviews
works better with my t3 then 7d. do i regret buying it? no. have a found an amazing use for it? no. but i will soon i hope lol
Many people will probably be like me; having spent decent money on quality standard zoom or prime lenses and just don't have the extra money to spend on a quality macro lens. Your first research will lead you to the OEM tubes which cost hundreds of dollars, then you'll see the "dumb" tubes for dirt cheap and you'll consider those until you discover that you can't adjust aperture from the camera or have that helpful focus confirmation chirp with them because they don't have the electronic connectors. Then you'll see this extension tube. Solidly built, I have zero complaints with this tube.
It is a good product for its price. Only concern I have is the product made of plastics. Whether it is strong enough to stand in between the camera body and lens is the question I have. Everything else works as expected.
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