At the time of first entering the world of DSLR cameras, one of the confusing aspects is to translate the codes listed in the label of a lens.
- Canon EF-S 18-55 f/3.5-5.6 IS
These lenses are usually a package deal if purchased as a kit lens Canon DSLR camera that entry level or beginner such as the Canon 1100D, 550D and 600D.
IS: Is Image Stabilizer, which means that the lens has the ability to reduce vibration or vibration during shooting so photos that are sharp. This feature is especially useful when shooting with a slow shutter speed.
- Canon EF-S 17-55 f/2.8 IS USM
If you find a lens with a minimum aperture is only one set, like f/2.8 lens, this means that the widest aperture lens has a fixed or unchanging. Focal length from 17mm to 55mm focal length, maximum aperture of f/2.8 fixed at a value.
USM: Abbreviation for Ultrasonic Motor, meaning the lens there is a built-in motor for auto focus. In this lens auto focus is faster and the bike is not noisy.
- Canon EF-S 18-55 f/3.5-5.6 IS
These lenses are usually a package deal if purchased as a kit lens Canon DSLR camera that entry level or beginner such as the Canon 1100D, 550D and 600D.
Canon EF-S: EF stands for Electro Focus. The lens of this model is designed specifically for DSLR cameras with a small sensor type (cropped sensor). This type of lens can not be mounted on a DSLR camera has a full frame sensor like the Canon 5D or 1D.
18-55 mm: Is the range of focal length lens (focal length is the distance between the optical center of the lens to the focal point located on the camera sensor). 18-55mm focal length of the lens is equivalent to a focal length of 29-88mm on a full frame sensor camera. Range of the focal length is versatile enough for everyday use.
f/3.5-5.6: This code describes the range of the lens aperture or lens opening. At 18mm focal length, the lens has a maximum aperture of f/3.5. And at 55mm focal length, maximum aperture is f/5.6 lens.IS: Is Image Stabilizer, which means that the lens has the ability to reduce vibration or vibration during shooting so photos that are sharp. This feature is especially useful when shooting with a slow shutter speed.
- Canon EF-S 17-55 f/2.8 IS USM
If you find a lens with a minimum aperture is only one set, like f/2.8 lens, this means that the widest aperture lens has a fixed or unchanging. Focal length from 17mm to 55mm focal length, maximum aperture of f/2.8 fixed at a value.
USM: Abbreviation for Ultrasonic Motor, meaning the lens there is a built-in motor for auto focus. In this lens auto focus is faster and the bike is not noisy.
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