Introduction to photography

How to use the zoom lens
1. Use long focal length focus

     when using a zoom lens, right after focusing focusing method is to use long focal length, and then choose the appropriate focal length shot; because, when long focal length, the subject of the image maximum depth minimum, which facilitates accurate focusing. When it encounters the backlight or light complex, also help to select the appropriate partial metering, without approaching the subject meter. When shooting in the usual, often with a zoom lens of longer focal length or focal length, focus and metering of the longest focal length, lock and then select the desired focal length shot, so you don't have to move your feet back and forth.

2. On the focal length to try

     most of the great interest in photography zoom lens zoom ratio issues, but is often the longest focal length when used with most, or even as a Jiao Yuan camera lens view. In fact, when you try to use the other focal lengths obtain distinct images, will find the zoom lens as a variable framing tool has considerable potential.

3. Familiar with zoom lens operation

     on early zoom lenses, zoom and focus are individually adjustable in the second ring. Now most of the zoom lens has been changed to single-loop control, is characterized by front and rear push-pull to change the focal length of the camera, rotate around to focus. Therefore, to just buy a new mirror for photography enthusiasts, to be familiar with and bear in mind that zoom around the direction and focus of left or right, avoid exact af zoom micro turn adjustment ring after impact and clarity. This is also a lot more "conservative" photographers prefer to use old-style double-loop lens causes.

4. Proper use of supporting structures

     when using focal lengths to 200mm or long focal length zoom lens, lens should be fixed on tripods and other supports to ensure stability when shooting.

5. Choose the right hood

     zoom lens produces a Halo more easily than other types of lenses, so a proper hood is indispensable. Hood sometimes cause occlusion in single-lens reflex camera for the scene not visible on the screen, but on the film is displayed. This using a small aperture when shooting the most obvious, often makes the hood also fell into the depth of field range. In addition, some hood at the telephoto end effective, but zoom to one end of the short focal length when used on the viewfinder screen makes the picture invisible halos caused by the occlusion map. Thus, for a zoom lens selection suitable lens hood and the rational use, is critical.

6. Plus teleconverter

     in the case of need to use very long focal length, spend a little money to purchase a teleconverter twice times, will be free to your 70-210mm immediately 140-420mm ultra telephoto zoom lens of the camera, a 3 times teleconverter can be reached 210--630mm, making your lenses immediately among the ranks of the telescope. However, cost will be the loss of Aperture steps and the clarity of the pictures taken. For example, an F4 zoom lens plus twice after the teleconverter, aperture will lose 2 to F8, plus 3 times after the teleconverter, the maximum aperture is F11. As you know, to play the best resolving power of the lens should be selected smaller than the maximum aperture receiving 2 aperture to shoot. Therefore, must be taken into account when the teleconverter added use high-speed film and a tripod, and the subject to rest.

7. Using filters

     unless you really need, generally do not add filters to a zoom lens. At the beach or salt water environment, really need a protective mirrors. In order to change the color temperature, producing special effects, for example in order to deepen the sky color and the Elimination of reflective, need to add a polarizer. In addition, plus some optional filters, will only increase the already annoying issue light within the lens.

8. Control the screen depth

     with a zoom away from the subject of 1.5 metres with 60mm shoot, and at a distance of 7.5 metres by shooting 300mm shooting, received photos of the subject image is the same size, the difference is two photos picture depth. Photos taken by 60mm against the backdrop of a sense of depth and space and 300mm shot, gives the impression that the scenery is compressed, the subject and still seems to be "closer".

9. Keep your distance and prevent distortion

     use the wide-angle end of the zoom lens when shooting to attention with the subject to maintain the appropriate distance, so as to avoid the subject of deformation. Remember when shooting distance is the main factor affecting perspective, rather than the focal length.

10. Knack for controlling depth of field

     can do an experiment, using the same Aperture at the same distance to the focal length of 25mm and 50mm, respectively taking two pictures, 25mm photos will be used to enlarge the picture was taken in Imaging and 50mm a piece of the same size. Compare photo background will find that, after enlargement the background in the photo is not as Dim as in the first photo, actually got better depth of field. When this method is applied to fixed-focus wide-angle lens as well.

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