The Canon EF 12 II Extension Tube is especially suited for close-focusing with wide-angle lenses. The result of using extension tubes is that the distance from the back of the lens to the film surface is longer, which means you can take photographs at shorter distances to the subject. Extension tubes are thus commonly used for macro photography and sometimes for closeup portraits.
The Canon EF 12 II Extension Tube is especially suited for close-focusing with wide-angle lensWIDE-ANGLE LENSHas a short focal length, hence a field covering a wide angle, ideal for architectural, interior and landscape photography where the photographer may be unable to move further away from the scene to photograph it. Wide-angle lenses come in both fixed-focal length and zoom lens varieties.es. The result of using extension tubes is that the distance from the back of the lens to the film surface is longer, which means you can take photographs at shorter distances to the subject. Extension tubes are thus commonly used for macroMACROProducing photographs that render extreme close-ups of extremely small subjects like insects, hence its popularity among nature photographers. It requires using a macro lens with a large reproduction (magnification) ratio of at least 1:1, which renders a subject larger than life size. Macro lenses are capable of focussing at extremely short distances (some as little as a few centimetres), allowing the photographer to get very close to the subject. photography and sometimes for closeup portraits.
When using the camera's TTL metering system, no exposureEXPOSUREExposure is controlled by three elements: Aperture, Shutter Speed and ISO. Achieving the correct exposure is similar to collecting rain in a bucket, up to an optimum level. The rate of rainfall is out of your control (light), yet you can control these three factors: the bucket’s width (lens aperture), the duration you leave it in the rain (shutter speed), and how effective your bucket is in collecting rain (ISO). These three elements work together to control the amount of light per unit area, preventing underexposure (too dark) or overexposure (too bright), giving you a natural looking image. compensation will be required (exposure compensation is required for handheld meters).Extension Tube EF 12 II is especially suited for close-focusing with wide-angle lenses. This updated version II is also fully compatible with Canon Digital EF-S lenses, as well as standard photo EF and TS-E lenses, except 15mm f/2.8 fisheye, 14mm f/2.8L and MP-E 65mm f/2.8.
Shortens focusing distance of lens
Compatible with digital EF-S lenses, as well as EF and TS-E lenses
White-index mark provided for digital SLR EF-S lenses
Red mark provided for photo lenses
Canon extension tube EF 12 II
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