Zoom lens using experience
American photographer Norman Rothschild in the practice of using a zoom lens for many years has accumulated a lot of valuable experience, summarized as the following 10 information available to photographers.
1. Use of long focal length focus
Using a zoom lens, the correct focus is to focus first with a long focal length, and then select the appropriate focal length shot; because the long focal length, the subject of the image maximum and minimum depth of field, which facilitates accurate focusing. Backlight or light in the face of complex situations, they help to select the appropriate partial metering instead of approaching the subject for metering. In normal shooting, often with a long focal length of the zoom lens focal length or the main focus and metering with a maximum focal length, exposure lock and then choose the ideal focal length shot, so you do not pace back and forth.
2. The focus on trying to make more
While most photographers are extremely concerned about zoom zoom ratio, but the specific use has often used a long focal length is up to, and some even treat it as a fixed lens Telephoto view. In fact, when you try to use the other focal length to obtain distinct images, the zoom lens will be found as a variable framing tools, with considerable potential.
3. Familiar with the operation of zoom lens
Early zoom lens, the Dell Inspiron 1520 adapter zoom and focus are adjusted separately Ring. Most zoom lenses are now to single-loop control, which is characterized by lens focal length before and after the push to change, so rotate to focus. So, just buy a new lens for photography lovers, be familiar with and keep in mind before and after the zoom and focus the direction of the left and right position, to avoid sharp focus a little after the turn due to micro-adjust the zoom ring to affect clarity. This is also a lot more “conservative” photographers prefer to use the old double-loop zoom lens causes.
4. Appropriate use of supports
When using a focal length of 200mm or longer focal length zoom lens, the lens should be fixed on a tripod and other supports to ensure stability when shooting.
5. Choose the right hood
Than other types of zoom lenses are more prone to flare, so a suitable hood is indispensable. Block in the hood sometimes caused by a single lens reflex camera viewfinder screen point of view does not come out, but the film is displayed. This small aperture when shooting using the most obvious, is often also fall into the depth of field will range hood. In addition, some hood in the long end of the effective focal length, but the short focal length zoom to the end use, will make the photo have not come out of the viewfinder screen point of view due to occlusion caused by vignetting phenomena. Thus, in order to select the appropriate lens hood and rational use is essential.
6. Plus teleconverter
Need to use very long focal length in the case, for very little money to buy a 2x teleconverter, you can free your 70-210mm lens now becomes 140-420mm super-telephoto zoom lens, a 3X teleconverter more up to 210 – 630mm, the lens of your telescope immediately among the ranks. However, the price will damage the aperture was taken a photo series and clarity. For example, an F4 zoom lens with 2x teleconverter, the aperture will lose two and become F8; plus 3 times the Teleconverter, the maximum aperture becomes F11. As you know, to play the best resolution for the lens power should be selected smaller than the maximum aperture closing the aperture to shoot two. Therefore, when added with teleconverters must be considered when the selection of high-speed film and a tripod, while still subject to the appropriate.
7. Caution filter
Unless absolutely necessary, usually not added to the lens filter. Salt water at the beach or the environment, does require a protective lens. To change the color temperature to create special effects, for example, to deepen the color of the sky and the elimination of reflection, to be added with the polarizer. In addition, plus some optional filters, will only increase the already vexing problem of reflection of light within the lens.
8. Control the depth of the screen
Away from the subject using a zoom lens with 60mm focal length 1.5 meters shot, and at 7.5 m distance from the subject taken with a 300mm focal length, images from the photo’s subject is the same size, the difference is two photo frame different depths. Photographs with a 60mm focal length, depth and sense of space the background; and 300mm focal length shot, giving the impression that the SONY np-fs22 battery scene is compressed, the subject and the scene seems to be “closer to” the.
9. Distance, to prevent deformation
Using wide-angle zoom lens when shooting at one end, and subject to pay attention to maintain an appropriate distance from the subject to avoid distortion. Must remember shooting distance is the main factor affecting the effect of perspective, rather than the focal length.
10. Control depth of field trick
Can do an experiment, using the same aperture, respectively, at the same distance 25mm and 50mm focal length two shots, then use the 25mm focal length magnification photographs, the picture of a subject video and 50mm in the same size. Compare two photos of the background will find enlarged photographs of the background is not as if the first photo in the dim, in fact, been more useful depth of field. This method is applied to fixed-focus wide-angle lens to be effective.
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