Myth: anti-shake feature (Anti-Shake) means the resulting image is always sharp

Image stabilizer, Vibration Reduction and SteadyShot are terms used by each manufacturer lens refers to the lens vibration reduction system (vibration reducer). This system reduces vibrations caused by hand-shake when shooting to produce sharp images. This feature is a must-have if you are using a telephoto lens on your camera because the slightest vibration on the telephoto lens will produce images that are less sharp.
But you need to know that this feature is not intended to reduce the movement of the object to be in portrait. Therefore, even with the advanced technology of the anti-shake system was still not going to guarantee produce sharp images if the object being photographed constantly moving. You still have to learn how to maximize the use of this feature to get maximum results.

Myth: The camera or lens is better if it has a longer zoom

The fact is that long zoom lens will slow down performance and can potentially reduce the quality of the resulting image. Lately, there are some pretty good ultrazoom lenses available on the market, but the lens is certainly not cheap. The first generation ultrazoom lenses are created with a lot of shortcomings, including the absence of an anti-shake feature in some brands. Please choose the type of lens if you want, but make sure you buy ultrazoom lens is the latest model (at higher prices as a consequence).

Here are some facts about the camera lens you should know:

- A lens has some elements in it. The more elements, the more complicated the passage of light and this will tend to reduce the quality and sharpness of the lens. This is why the zoom lens has low sharpness of the prime lens (prime lens), because many elements of the zoom lens. Even if there is a zoom lens with a sharpness that can fit prime lens, the price would be very expensive.

- Deviation or distortion will occur on a wide lens (including fisheye lenses). That's why wide lenses are not recommended to take photos of people's faces. Also avoid using wide-angle lens to photograph a straight line because it will produce a curved line on the photo.

- The sharpness of each lens is different. The sharpness will be reduced when the lens aperture opened at widest or narrowest aperture. The sharpness of the zoom lens is also reduced when at the very end of the zoom. For the best sharpness, use a focal length from wide to normal and use the aperture sweet spot.

- The center of the lens is always sharper than the edges. A good lens has the same sharpness between the center and the edge of the lens, while the lens is a lens that has ugly sharpness reduction at the edges. Decrease called blurriness corner sharpness. However, given that the majority of image objects are in the middle, people often ignore the decline sharpness at the edges of the photo.

- The maximum aperture of a lens aperture zoom can change depending on the focal length (focal length) is set. To avoid the complicated lens design, the lens zoom has its own uniqueness with different maximum aperture at different focal lengths. Note the writing on the lens. For example, a 35-105 mm f/2.8-4.5 lens means that the focal length of a width of 35 mm, the maximum aperture is f/2.8, and at its 105 mm telephoto zoom down to f/4.5 maximum aperture

- The lens super zoom has undergone many changes. At first, no one lens that has a focal length extremes that can accommodate the needs of a wide focal length of 26 mm to 520 mm telephoto zoom in a single lens. However, due to the demands of the market and fierce competition between brands, manufacturers were forced to make the lens all-in-one, also known as a broom lens universe like a camera lens on the Olympus SP 570 with a 20x zoom. Super zoom lens with a zoom range of 10 to 12x telephoto fairly balanced between the ability and the quality of its output, while the 15x zoom lens, 18x, and 20x looks a little forced by the need for people who want ultra zoom although the quality of his output declined.

09/11/2013 7:50am

It will be much better picture quality


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