choose 4 factors of the lens
First, choose the lens focal length
the first to note is namely the lens focal length, focal length is actually outlooking angle, focal length is differ in different perspectives . Another consumer have to be explicit, I purchased the lens main objective? Is to shoot landscapes or shoot people and so on. As we all understand, shoot wide-angle lens is fitting scenery, and character is applicable to shoot telephoto lens, it have to first be determined according to the intention of his own photography to buy the lens focal length.
best scenery photography namely the wide-angle focal lengths focal lengths 24mm, telephoto focal lengths of 200mm (35mm size are standard, the same beneath). When a standard zoom lens focal lengths from 28mm wide-angle apt 24mm after the evolution of larger perspective, the scene can be merged apt broaden the range considerably. Generally speaking, the maximum aperture of the lens shooting outlook no too high. If you effectively shoot landscapes, then select the zoom lens,
GHD, 24mm wide-angle focal length namely basically enough to use. As for the telephoto focal lengths, at fewest obtain a 200mm, 300mm, or if the 400mm telephoto focal lengths is even more ideal, and emancipation will be greatly improved. Traditional telephoto zoom lens focal length is extra than 300mm,
GHD Hair, accustom in digital SLR is 450mm, focal length extended along 1.5 periods, with them makes one feel extra elated, this is the worth of the digital SLR. Now produced digital special ultra-wide angle lens wide-angle focal lengths generally to 12mm, equivalent to 35mm size 18mm, 28mm focal length than 35mm size inflated almost 1.5 periods,
GHD Straighteners, so the shooting scope much wider landscape approximately the scene.
photographing folk the best focal length is 85mm. To 35mm size standards, in order to capture the elementary characters to choose as the standard 85mm focal length lens. 85mm focal length is close to the film's portrait of the movie middle format camera picture efficacy, not merely the right sense of distance, and the characters face is very natural, the camera and the subject distance among the basic symbol can be retained at normal speaking distance. 85mm focal lengths to mist the background can be very prominent figure. To get a nice blur effects,
GHD Red Butterfly 2011, should select a great maximum aperture of the lens. 85mm focal length ashore a digital SLR is approximately 135mm, although the sense of distance seems a little shade shot a mini languid, merely the basic is OKAY, so shoot human at least in the lens focal length of about 85mm.
flowers on the traditional SLR film has a 100mm macro lens is ample. 100mm macro lens and other times photography,
GHD IV Salon Straighteners, flowers, looks great can, however, when other times and other times close to photography or photography, the focal length as the depth of view, prone to move, so to consider stabilization fathom taken. From this point of view, 50mm macro lens with digital SLR is easier to use.
Second, the maximum aperture
maximum aperture of the true value of the rendition in low light locations boost the sum of light, so as to achieve optimal exposure combination. Requirements generally do not shoot landscapes of the virtual camera capabilities,
GHD Straighteners NZ, in addition, unless otherwise dingy location appearance the lens aperture is generally not too claiming. However, when the 70-200mm zoom lens, 2x teleconverter leaving the installation into a 400mm telephoto focal length and auto-focus with AF, the best choice for the maximum aperture is F2.8 lens. Large aperture in dark conditions favorable to exactly focus. Large-diameter lens with people even in low light can also use natural light handheld shooting. In addition, a large maximum aperture of the lens can bring a faster curtain speed, so the sports photography requires large-diameter lens.
requires a large lens aperture, distinct cause is to free to blur the background, but too to ensure blur quality. Maximum aperture F1.4 lens when the aperture is stopped down to F2, whether it is image quality or the quality of background blur are stronger than the maximum aperture of F2 lens. Therefore, large-diameter lens aperture to restricted a document with a large value, whichever photographer should be good to use the camera this trait.
three, close-up ability
lens close-up ability is second only to the focal length, maximum aperture of an choice focus. This is either for wide-angle lens, standard lens or a telephoto lens are the same. So, close-up ability in the end how much it would be appropriate?
said 1st shooting landscapes with wide-angle lens, wide angle lens for close-up ability is almost nought, but when shooting landscapes with a broad background of the flowers, landscape, it is often needful to photograph flowers larger, wide-angle lens in similar circumstances the close-up ability becomes very important.
existing 50mm standard lens close-up ability in 45cm hardly ever, basically encounter the use. However, the use of large aperture standard lens in the shortest shooting distance, for the lens is extended, often there is a huge aberration, which led to low quality, purchase and use of this point should be mentally prepared.
telephoto lens for shooting landscapes, then if, for close-up does not have much capacity requirements. However, if used to shoot people or flowers, the lens close-up ability is very essential.
four expressive
selected lens is a lot of people first memorandum how the image sharpness of this lens. Photos uses determines what variety of lens sharpness. High-quality lens for vocational photographers use the main, if only the common photography, there is no need to cost a lot of money to purchase valuable high-quality lens. In addition, the lens aperture size image sharpness and also has a direct relationship, when a narrow maximum aperture of the lens from the image sharpness after a two steps will greatly amend.
perversion caused by the lens optical properties of one optical phenomenon, every lens distortion can not not exist, manufacturers are entire in the creation of lens perversion has been rectified, and aspire to distortion to a minimum. Generally there are 3 main lens distortion: wide-angle zoom lens barrel end is prone to distortion, pincushion at tele prone to distortion and barrel distortion wide-angle end to a revised type of distortion produced by the caps. On the current status of the lens, the maximum prominent problem is the wide-angle end of the barrel distortion, as distant as feasible choose to purchase a small tub style distortion.
photography blur beyond the capabilities of the people eye, it aroused large amuse. Inherent quality of a virtual problem, there is the difference between clean and filthy. Blur the background was pretty, the image appears soft; blur was polluted, the light will be dispersed to the four turns of the screen, but some blur was not a beautiful circular, is a solemn manner of twice virtual state. Ideal lens, the light will be scattered to form a very natural blur state.
lens blur on the background and the competence of the lens aperture also has a relationship. Many narrow a lens aperture from the 2 tranches of the largest image now after agreeable sharp, but relatively lower virtual capabilities. Ideal lens with maximum aperture making very sharp images, and blur effects are also very good.
backlit photography due to the muscular brightness or other strong light reflection in the mirror anew to form on the screen will glow and fan. The formation of halos and flares will not only this small part of the light image on the screen, but also the formation of haphazard reflection in the mirror and lower quality. To prevent this phenomenon, backlit photographic hood must be used. Good lens to take in the fabrication process of a thorough process to prevent flare and flare, even when shooting in backlit is also very good compare.
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