Understanding Codes In DSLR Camera Lenses
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. In this article will explain several kinds of lenses and codes contained in the lens. For his case I will use Canon lenses.
- 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 lamba 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 50mm f/1.8
The lens has a range above the focus, which is 50mm. This means that the lens is not a zoom lens or can not zoom. You can not change the focal length to zoom in or out objects. To do so, you must do it manually by running toward or away from the object. The lens type is more commonly known as the prime lens.
This lens is also characterized by EF code, as opposed to EF-S, which means it can be mounted on the camera also has a full-frame sensor.
- Canon EF 70-200mm f/4 IS USM
These lenses are categorized as telephoto zoom lens because it has a wide range of focal lengths from 70mm to 200mm.
- Canon EF 100-400mm f/4.5-5.6L IS USM
f/4.5-5.6L: Code "L" premises also known as "Luxury". Canon L lenses with code meaning expensive lenses made for the purposes of professional photographers. -L lenses are the best lenses are made with a variety of focal length and aperture.
The codes on the lens that has been described above do not apply universally, the lens with the other brands (besides Canon) will give different codes to describe the features of the lens but it is not a problem because the structure of the code is the same between one brand of lens with another lens brand.
Here is the code that is common in other brands lens:
HSM: Abbreviation of Hypersonic Motor. That is the same as USM auto focus is faster and the bike is not noisy. This code is used on the output lens Sigma.
AF-S: Same with EF-S code, in the design for a camera with a cropped sensor type sensor. This code is used in the Nikon brand lenses.
SSM: Abbreviation of Supersonic Wave Motor. That is the same as USM auto focus is faster and not noisy. This code is used in the Sony lenses.
AF: Nikon lenses without auto focus built-in. At entry Nikon DSLR cameras such as the D60 and D5000 leveI, a lens with this code can not be used to auto focus, manual focus is done.
VR: It stands for Vibration Reduction, Image Stabilization function with. This code is used on the output of Nikon lenses.
OS: Abbreviation of Optical Stabilization, together with Image Stabilization function. This code is used on the output lens Sigma.
VC: It stands for Vibration Compensation, has the same function with Image Stabilization. This code is used on the Tamron lens.
DG: Code explains that the lens is a lens that can be used for the two types of sensors that can be used for a camera with a cropped sensor camera with a sensor and a full frame sensor. This code is used on the output lens Sigma.
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