Extension tubes enable you to shoot closer to your subject than your lens would normally allow. Extension tubes are 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.
Voking extension tubes for Canon are hollow, in that there are no lens elements or machinery inside the cylinder. Extension tubes connect to the SLR camera’s body just like a lens would, but also have a connection on the front to accept a lens connection.
The Voking extension tube kit contains three tubes of different length, a 13 mm, 21 mm, and 31 mm, which can be used individually or in any combination to obtain the desired magnification.
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