Canon EOS 30D Instruction Manual page 274

learn more about mocro
lenses [][JlI
Change the vertical/horizontal framing instantly without altering the
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tripod mount ring
Useful a't times like these!
Perhaps you shoot a horizontal composition, then feel like taking a similar photo in a
vertical framing. With a regular tripod, the subject position through the Vle\Ntmider
inevitably shifts and the photographer has to refocus from the start. With a tripod mount
ring, however, you can maintain the position of the subject in the viewfinder - for an
easy, instant frame change to a vertical, horizonta" or even an angled composition.
What is a mount
Tripods are normally attached directly to the camera body. Lenses equipped with a tripod mount ring, however,
allow the tripod to be attached to the lens rather than the camera body. Accordingly, the camera rotates with the
lens at the axis, and atter the macro lens is attached, the front/back weight distribution is improved. The result is
steady, blur-free photography.Tripod mount rings are available for the EF100mm f/2.8 Macro USM, and
supplied with the EF180mm f/3.5L Macro USM and the MP-E 65mm f/2.8 1-5x Macrophoto lenses.
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