Canon EOSIX7 Manual do Utilizador Página 26

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EF25 EF12
Macro Ring Lite MR-14EX
MP-E65 mm
Extender
EF 2X II
Extender
EF 1.4X II
Close-up lenses. Close-up lenses screw to the filter mount at the front of the lens, providing a
simple, inexpensive method of increasing subject magnification. There is no loss of light and all
camera and lens functions are retained. However, autofocusing is not always effective and manual
focusing is recommended. Three Canon close-up lenses are available. The close-up lenses 250D and
500D both use two lens elements to reduce colour aberrations. The close-up lens 500 is a one-
element accessory for low-cost close-up photography. The 250D is recommended for lens focal
lengths from 38 mm to 135 mm and is available with a 52 mm or 58 mm filter thread. The 500D
and 500 lenses are recommended for focal lengths from 75 mm to 300 mm and are available with a
filter thread of 52 mm, 58 mm, 72 mm or 77 mm.
EF extension tubes. Extension tubes fit between the lens and the camera body and allow the lens
to focus much closer than normal, giving increased magnification. The larger the amount of
extension and the shorter the focal length of the lens used, the greater the increase in magnification.
However, especially when using wide angle lenses to obtain high magnifications, working distances
can get very short.
EF Extenders. Extenders increase the effective focal length of lenses while retaining the minimum
focusing distance. The focal length is increased by the factor indicated. Extenders are only
compatible with a selected range of EF telephoto and they can also be combined with extension
tubes and close-up lenses for close-up and macro photography.
MP-E65 f/2.8 1-5x Macro Photo Lens. This is a specialist lens for macro photography only. At its
smallest magnification the lens gives life-size (1:1) images, while its maximum magnification is five
times life-size (5:1). The use of ultra-dispersion (UD) glass in one of the 10 elements of the lens
virtually eliminates the chromatic aberrations that are a common problem with high-magnification
images.
Macro Ring Lite MR-14EX. Lighting for close-up photography can be a problem the subject is
often too close to the lens for conventional lighting to be effective. The Macro Ring Lite MR-14EX
overcomes this by mounting twin flash tubes on the end of the lens (an adaptor may be required).
The tubes can be fired together or separately to control the shadows given by the lighting. Exposure
is handled automatically using E-TTL flash metering. An exposure confirmation signal is provided.
Macro Twin Lite MT-24X. This versatile flash accessory brings creative control to macro
photography. The unit attaches to any of the EF macro lenses and provides two fully adjustable flash
heads. The heads can be individually rotated vertically and horizontally. The ring on which they are
mounted can also be rotated. Full E-TTL autoflash control is available, with FP Flash, FE Lock, flash
exposure compensation, flash exposure bracketing (FEB), and flash ratio (A:B) control. The Macro
Twin Lite can function as the master unit in a wireless multiple flash set-up.
CLOSE-UP ACCESSORIES
250D 500D 500
Macro Twin Lite MT-24EX
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