Explanation about DSLR camera lens
A camera lens (also known as photographic lens or photographic objective) is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or electronically.There is no major difference in principle between a lens used for a still camera, a video camera, a telescope, a microscope, or other apparatus, but the detailed design and construction are different. A lens might be permanently fixed to a camera, or it might be interchangeable with lenses of different focal lengths, apertures, and other properties.
While in principle a simple convex lens will suffice, in practice a compound lens made up of a number of optical lens elements is required to correct (as much as possible) the many optical aberrations that arise. Some aberrations will be present in any lens system. It is the job of the lens designer to balance these and produce a design that is suitable for photographic use and possibly mass production. (source: wikipedia)
Camera Lens structure
Camera lens has some structure, depending on the type and brand. But it is clear there are some important structures in each lens, as shown in the picture below: |
| source : gilangajip.com |
The Structure Of The Manual Camera Lens
- The body of the lens, the lens or body is a form
- Glass lenses, the core part of the camera lens
- The focus ring, to determine the focus on the lens
- The ring Focal length, to determine the distance of the focal length
- Diaphragm ring, to determine the value of the diaphragm
- Rear Cap, cover the back of the camera lens
The Structure Of The Digital Camera Lens
- The body of the lens, the lens or body is a form
- Front Cap, cover the front of the camera lens
- The focus ring, to determine the focus on manual mode
- The ring Focal length, to determine the distance of the focal length
- Button Auto focus, auto mode to change the focus or manual focus
- Button Image Stabilizer, to turn a feature Image Stabilizer
- Rear Cap, cover the back of the camera lens
Types of camera lenses
There are various types of camera lenses, can tergantuk on the form, the model, function and brand each. The following types of camera lenses:
According To The Type Of Camera Lens Technology
1. Manuals Camera Lens
Lens Manual KameraLensa manual cameras manual cameras were also used to (SLR). This versatile lens operation manual, from the beginning to determine the point of focus, to determine the diafragmanya. Most physical properties of manual lenses can be seen from his body made of steel and the obvious no buttons or swit replacement auto focus.
In the current era, manual lenses can also be used on a digital camera, but had to modify the manual lens mount to be attached to a digital camera. This manual lens advantage is his strong body, and if it finds a fitting focal point then his results will be very sharp.
2. Digital camera lens
Digital camera DigitalLensa camera lens used for a digital camera or camera DSLR (Digital Single Lens Reflect). The operation of this digital lenses can be manual or otomasis, because there is the button auto focusnya. But if you use the auto focus mode on, never rotate the ring its autofocus, because it will damage the digital lens.
Features of digital camera lenses are typically made from a type of plastic, has the features autofocus and certainly used in digital cameras. Excellence on the lens is certainly on autofocusnya features in compare with manual lenses.
The type of the camera lens by function and its Focal Length
The following are the types of lens according to their function and its focal length, can be used as a reference if PAL wants to buy a new lens. Don't get me wrong select Yes.
1. Standard/Normal camera lenses
Canon lens Fix 50mmLensa standard or normal cameras have focal length between 35 mm – 70 mm. The most common of the standard lens is a lens that has a focal length of 50 mm (such as lens canon 50 mm F1.8 Fix). Because the lens focal length of 50 mm, his gaze is equal to the human eye.
Standard or normal lens usually used for documentation and street photography, where a photographer led to move quickly and take photos. The advantage of this camera lens is not too large and easy to carry everywhere.
2. Medium Telephoto camera lenses
Camera lens 100 mm USMLensa CanonEF medium Telephoto has a focal length between 80mm – 135 mm. focal Range between 80-135 mm is almost always used by photographers to photograph portrait or model. because at the focal length not possible distortion.
Camera lens fix on the type of medium telephoto camera lens this is the ideal camera for photographing portraits or model. Because as it says above the distortion will not happen. Canon lens EF 100 mm f/2.8 Macro USM is an example of one type of medium telephoto camera lenses.
3. Telephoto Camera Lens
Lenses Canon EF 200 mm IS USM Telephoto camera f2LLensa has a focal length between 135 mm and 300 mm. Characteristic of this long lens, this lens has a range of a goodly distance. So the proper function in this camera is for photography sports or wildlife photography.
Why telephoto lens photography is used for sports or wildlife photography? because it is not possible if we want to place sports a photographer an exercise such as motogp and we photograph should be closer to kelintasan? or if we want to photograph a lion in the jungle and we must draw near to the lion? One example of the lens of the telephoto Lens is the Canon EF 200 mm f/2 l IS USM.
3. Super Telephoto camera lenses
Lens AF-S NIKKOR 300 mm F2.8 G ED VR IILensa Super Telephoto cameras have focal length is more than 300 mm. Characteristic of this lens is long, and often required a tripod lens to prop up the front of the lens is too long. And keep in mind, the price of a super telephoto lens is also the panorama superrr sekale..
The function of the Super Telephoto Camera lens is the same as the lengsa camera telephoto photography, i.e. for sports and wildlife photography. Super telephoto camera lens used if a fotograer wants more from lens telephoto. One example of a super telephoto lens is a Lens AF-S NIKKOR 300 mm f/2.8 G ED VR II.
4. The Wide Angle camera lens
Lens Tokina AT-X 116 Pro DX camera lensLensa Wide Angel has a focal length below 20 mm. As the name suggests, the wide angle camera lens features a wide capture power. This lens will produce image distortion.
The function of the wide angle camera lens is to photograph the scene, photographing architecture, sometimes also used for photographing a group of people. We often hear the word Landscape Photography, landscape photography is well suited to use this type of wide angle lenses. One example of a wide angle lens is a Lens Tokina AT-X 116 Pro DX lens.
5. Fisheye Camera Lens
Lenses Canon EF 8-15 mm f4L fisheye lens Fisheye Camera USMLensa is special. Fisheye camera lens usually has a focal length between/under 10 mm. fisheye Lens this will produce images that are unique, very distortion to a circular image that connects between the sides of the picture/photo.
Because the lens is a fisheye camera lens specials, used specials-the specials too, her example if a fotografet want to show effek fisheye on a photo. One example of Fisheye Lens is the lens Canon EF 8-15 mm f/4 l fisheye USM.
Types Of Lenses That Are Often Encountered
The lens type is often found there are 2 kinds. What is it? certainly often heard and maybe you have both types of lenses. Let's take a look.
1. Camera Zoom lens
Camera zoom lens is a lens that can zoom, or lens has a focal length range, e.g. Canon lens EFS 18-mm IS, it is a zoom lens.
2. Fix the camera Lens
Fix the camera lens is a lens whose focal length is already set, do not get on, so that zoom back and forth are photographers. Fix lenses tend to be sharper results than zoom lenses. (the same class). An example of lens fix lens is the Canon 50 mm f 1.8.
Conclusion
A description of the camera lens above is a basic description should be in the know by photographers the camera jockeys. The selection of lenses that fit in every activity of the photography especially helpful and affect the end result of a photographic activities.
An explanation of the DSLR camera lens
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