How to choose a few scenes SLR camera lens - the concept

Choose lens,jvc bn-v20u battery it is absolutely all after buying back camera SLR user a difficult problem. Choose the brand, narrowing the lens choice scope, but there are still many problems to be solved. For example:

Zoom and fixed-focus how to choose?

Why poor level 1 aperture size can differ so far?

Aperture why floating and constant cent?

One machine to two lens or buy a tianya mirror?

Whether all buy directly buy camera lens better picture?

More questions for beginners, time really hard to digest. If you find nearby of friend give too much advice, as first look this paper, make clear the concept of few scenes in front of mirrors would be more got the picture.JVC BN-VF823U Battery

1. Quality preconditions - fixed-focus must be better than zoom?

If you asked friends comments, believe almost all people will tell you fixed-focus camera quality than zoom lens. This statement is largely right, but it is not absolute. Just zoom lens itself also runs several kinds, if will set of machine zoom lens and fixed-focus camera, this rather than to have unfair.

From the lens quantity measurement

Fixed-focus camera is recognized quality good, maybe you just proved simple namely beautiful truth. Nikon AF - S with NIKKOR 50 f / 1.4 G, for example, lens number 8 pieces; only If it is a certain quality zoom lens, like nikon AF - S NIKKOR 24-70mm f / 2.8 G ED, need 15 pieces lens. Because it can zoom, lens increase is undisputable. But the more the easier lenses are bring some problems, such as chromatism - due to the increased number of internal refraction of light scattering, the higher the optical axis deviation, make the opportunity arise when high-contrast of purple edge is easier to appear. In addition, sharpness will also because after multiple lens and constantly discounts. So should pursue graphics, fixed-focus camera is first selection.JVC BN-VF815 Battery

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Lenovo le Pad: tablet PC or laptop?

And any a hp pavilion dv1210us battery good magician is same, Yang yuanqing know how to manufacture suspense. In a visitor in front, his first show his new invention is how as a basic laptop ─ ─ to use looks just like a laptop computer. Of course there is more things, Yang yuanqing not disappoint. His instant took screen took down from base, take in the hand, become a refined, independent, fully running the tablet computer cabin operating system. As China's lenovo group CEO announcing that Yang yuanqing jolly, two systems, base is Windows screen is Android. This natural give his only an audience was impressed.

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Lenovo group CEO in China is expected to pursue music Pad tablet PC market will occupy 20 percent. This is the so-called "music association LePad)." (Pad The "Le" representative Lenovo, and representatives of English Lenovo Chinese characters "happy," "music". Yang yuanqing have high hopes to music Pad. He is expected to open in China to sell Taiwan recently the tablet computer hp pavilion dv5008ea battery will soon accounts for the tablet computer 10% of sales. Within two years, he says, could increase to 20% the share. Le Pad in other markets are also likely to be superheroes. According to the plan, this product will be released this summer in the American market appear.

Lenovo faces fierce competition. Over the past few months, there have been 60 rival about 100 types of tablet PCS, every family hope listed the dominance of apple iPad shaken. But if anyone who can high-profile land into the market, probably is the world's fourth-largest PC manufacturers ─ ─ lenovo.

In the personal computer hp pavilion dv5023ea battery market slackens, lenovo is still in expanding its domestic and international market share. It in the domestic market share finishing third. The past six quarters, lenovo every quarter of the world's top five individuals are among the fastest growing computer manufacturers, with the growth of a 16.3% covers the entire market rate of slow down 3.2%.

Lenovo adopt a "proving inconclusive" strategy, on the one hand, in the mature markets and the Chinese market, and increase profits in emerging markets relentlessly enlarge market share. This strategy is formulated in 2008 the Yang yuanqing, when lenovo in global economic downturns have lost a large market share.

Le Pad may lenovo "attack" side to play a leading role. This machine set laptops and tablet computer in one device not only functional diversity, the price also attractive, about $1,000 in the pricing in laptops hp pavilion dv5054ea battery, tablet function is intermediate level is free throw in. The pricing in China, developed countries and emerging markets of enterprise users should work. Emerging market conditions and other countries in different: in many parts of the world, tablet PC sales has impaired laptop sales, and in emerging markets, laptops still sell very much better than ever before.

Lenovo is not exclusive laptop/tablet computer market. Dell (Dell) has introduced a laptop/tablet computer in some important areas, but less joy Pad. In tablet mode, dell products very thick, screen folding to airframe, rather than from the fuselage, but no Android on separate operating system. The operating system by Google (Google) development, in touch screen electronic product performance, but have large application can use.

Digital media research firm Envisioneering Group's Doherty (Richard Doherty), said many consumers in laptops and tablet computer are torn between, in this case le Pad have a great chance of winning the world at apple tablet computer sales after the forefront of the position.

Just as any other product with lenovo lenovo's joy Pad, in the company customer base may have the greatest success. Lenovo in large companies and public institutions used laptops occupies the first, partly because ThinkPad series laptops, this is the international business machines (IBM) brand, company has been favorite laptop hp pavilion dv1029ap-pn888pa battery computer. Large companies still in the middle of 2009 after the so-called 7 launch Windows PC renewal cycle; Pursue this cycle, and that will be over a year or two. Lenovo will also attract smaller firms. Research firm international data information limited (IDC) David Daoud) said Sweeney (, this week, lenovo began in Best Buy (Best personal computer crashes, sales due to Best Buy for the sales of personal computers, lenovo one-third of a wise move one step.

At present, lenovo's operation profit margins lower than most rivals ─ ─ 2.2%, dell for the overall for 7.3%. This for some investors is a heart. However, lenovo's development speed, as more than very much quick moving Yang yuanqing said, profitability started well enhanced. China's margins already is relatively high above 5%.

He said, we in Western Europe and North America will resume. There we profit margins is good, and China's very close. Nowadays, lenovo must improve the situation; in emerging markets Lenovo market share in emerging markets, pushing the effort caused a loss.

Lenovo's shares look may be high, prospective p/e ratio is (according to the coming year for 22 times earnings). However, if not consider 32 billion dollars, with a price-earnings ratio of will fall to net only 6.7 times. In addition, lenovo's revenue has grown steadily; The expected in fiscal year ending march for earnings per share, this year for $0.027 0.038 dollars.

The personage thinks, like lenovo lenovo share price could surge 43% per share, Hong Kong dollars ($6.50 to $0.84. Lenovo also in the United States to depository receipt form trading, code for LNVGY.

Guinness Atkinson mainland China and Hong Kong China & Guinness Atkinson Fund (Kong Fund) manager if James vergne Weir) said, (if lenovo can maintain market share in China, the company completed, lenovo updating cycle is worth buying shares will. For investors, lenovo is probably a let them joy up LeWinner). The winner HP Laptop Battery

Photography basic knowledge - shadow use

As British photographer sony np-fm50 battery frank Hector holt said: "everything in life, no more than is light and shadow, and when you see a beam of light from the window. You must instantly shot into the shadows, both thought not exist;"

Now that photography is "light" and a light ray paint, the shadow is not necessarily an important aspect of painting process. Although in photography often overlook the creation of the people the role of shadow, even intentionally avoided shadow, but it is still many photographic works of a vivid elements, the photographer with slight thinking, can's creative use of shadow; Improved photography.sony np-fh70 battery

Learn to use shadow first step was to try to enhance the consciousness, attention shadow until become a habit, and learn to distinguish could become part of the interesting work that would be a shadow and scattered the audience attention, undermining a picture of a good photo of the shadow. Photography, we usually eyes often only pay attention to main interest points, and ignore the shadow exist. In addition, the extent of human feelings light intensity than any film can feel much larger amplitude, therefore, when exposed to normal, pictures of shadow than the actual shadow commonly appear more black, but also can appear what you don't notice of the shadow. So, learn to prior aware of subjects and their effects on the shadow, is very important.sony np-fh50 battery

Shadow nature of light line nature. Overcast light scattering, this formed when diffuse light produced very downy light shadow, it is not obvious, sometimes even hard to become aware, therefore, often make the foreground subject given by the absence of shadows stereo feeling and space.

By contrast, direct light (including direct sunlight, flash or tengsten lamp direct injection of light) are produced by rigid, edge obvious Ming shadow, it and the foreground subject of the bright contrast sharply. In this case, can often gain beautiful modelling or otherwise. Experienced photographers know the importance of using this shadow. They usually use a light source the light and shadow to obtain, thus in works to create and pleasing to the eye, vivid feeling of depth and realism. However, photographer also warned the beginner, be careful to use this technique, otherwise will lead to sag of the eye socket and ugly nose projection.sony bp-l90 battery

Generally speaking, morning and evening shadow the longest, if in this time shooting, can often gain the effect of exaggeration and distortion. Filming find a higher perspective, the effect will be better. Sunshine is stronger, the dark shadows, its effect also is stronger. Black shadow due to the lack of a person to distracting, and can produce details the strongest, the most distinct picture form.

Should pay attention to selecting those concise, distinct and neat shape shadow as the main body, that will be filmed the most vivid, clear, interesting picture. Can also select the contour of the object shadow as clear picture composition. Be like likely, can also according to your intentions to furnish them to obtain the picture. But take note, sometimes the background on the shadow of subject terribly distracting the attention of audiences. It wants to avoid shadows become an illegible dark block appear, because it will not only distracting, and does not provide any useful content. Filming slightly move against light carefully select the brains, the Angle and unobtrusive camera, can the position of the body by the shadows to principals backgrounds add new idea.

Thick, has certain direction, if YangYing as balanced picture or enhance perspective structure elements, will be in a picture composition played a major role. Especially to notice the intersect in within the frame figures, buildings, trees and plants, they may help emphasize shadows within the frame space, perhaps will draw and divided into several parts. These shadows of the obvious cross-court may interwoven in the picture, cause bright abstract design.

Picture area of the shadow, sometimes produce unexpected charm. U.S. photographer E · weston experience shows that: "the traditional photography rules, is when the pictures into consideration on the shadow parts exposure, and to take part. I practice of light in the opposite direction: the main consideration of light exposure, part to take Ming shadow parts." The method proved weston works successes, because in his writings, large areas of Yin shadow be processed fairly unique. When shooting the very real prospect of mixed and disorderly and hard to avoid, using the scenery is very clear shadow area fruitful. Sometimes a three-story just completed for the filming of the building, but suddenly found piled haphazardly foreground area of construction machinery, removal of old scaffolding and other sundry, right now he can choose buildings are strong sunlight irradiation, and prospects the dark shadows but at the moment to film. This kind of Ming shadow help subduction all distracts details. Exposure to remember to get a accurate from the light area, such, shadow exposure readings in details could because of insufficient to display exposure. Whether by early or late in the sky, fairly low direct sunlight generate modelling, the architecture photography is very favorable. This light shadows, not only can show building shape, but the texture can behave buildings. When the sky light and shade in Ning no shadow, architectural photographer usually but not to take, because they know that now make pictures must be simple and boring;

Shadow of except available as composition of - 'outside, and its elements of value. Sometimes, if you look carefully, will cover in the area by shadow, found in direct sunlight impossible to obtain the abnormal subtle and often is beautiful downy colour. In the bright sunlight filming a portrait of the texture and characters of the hair skin texture may appear not beautiful, however, with a little make subjects into the shaded area, and acoordingly adjusted exposure, you'll find dazzling things disappear, but generation up is a series of subtle charm is tonal, increasing the portrait.

In the use of film, U.S. photographer John sea odd division thinks, use reversal often can better shadow; the colour While colour negative with greater tolerance, can maintain a certain level, thus makes the shadow effect weakens. The sea odd secco also cautioned the photographer, beware of the Ming shadow intake themselves picture. If pictures, then back to sun light projected out of their own shadow, it is very possible the appear in pictures, and during filming should pay special attention to. Sometimes, of course, with his shadow photographers purposely to represent himself in the field, that's another... Going on. Camcorder Battery

Bright summer colors shooting images of the sea

Summer sea, the canon nb-6l battery sun is stronger, so the sky and the sea should be much brighter than the figures, in which case automatic metering of the camera shooting pictures of the characters would be more darker, and this is the reason because the background is too bright. The camera's metering system metering allowed, when using spot metering would be much better.

This time, the camera canon nb-5l battery can be used in conjunction with exposure compensation, if the exposure +1 EV compensation, will be bright pictures are many. After recording the effect of this will become too bright, especially in the summer, but some girls do not care what your pictures have been exposed in the sky or lost levels, they only care about their own white shot just fine. If not easy choices, depends on customer requirements, and through communication, I believe the photographer and the customer can be satisfied with the results.

Beautiful seaside shooting portraits, mainly to create a fresh, bright, pleasant atmosphere, so the technique can also be taken along with the larger degree of freedom, the use of Virtual and approach, can take the fun and mystery photos.canon nb-4l battery

Line and the direction, the composition of contrast

During filming sony np-fm50 battery you will find that, when you will photograph objects placed on interest points, or rules on the intersection of the other side of the picture can have a lot of blank. In that case, must not thinking about the character's back into center position, can turn people a little closer to center position.

No matter which face on the characters sony np-fh70 battery of direction, in front of him (she) should be set aside some space. For example, the characters toward the left picture, then face to the left of the frame space should be more than the right, give a person a kind of visual sense of direction. Even if is the character looking straight at the camera, will side leave some space will increase picture form sense.

Life, we see that everything has its line, such as building vertical line, winding, level of drivers horizon and the direction of the moving objects, and many lines, etc, such as the line inscribed the wrist of the curves and limbs, by many points constitute line etc. Lines used in picture composition, plays a coordinating role of viewer view guided.

S form lines in picture composition, is often used in very beautiful female beautiful figure curve performance, shooting a woman, noticed her each body part curvaceous, such as the abdomen, brachial ministry and head various contour line, especially the curve of the lips, such as the curve neck and limbs all sorts of line combined body shape and characters, and environment the eye-gaze some of the concrete and abstract S form lines, thus can be well show the beauty of female human body.

Horizontal line let a person quiet, vertical line gives a person with stable, strength feeling, slash give a person with move feeling. But pay attention not to line from the center of the picture, it will truncate across the past two pictures, composition, should will line on screen 1/3 place.

Music has high bass fluctuation of and rhythm changes, photography modelling differs also exquisite contrast, without big does not show the small, no black just does not show the white, no real just does not show the virtual etc, using every difference, thus produce contrast aesthetic tastes. Common contrast methods are compared, the density contrast, size comparison and contrast, action unionizing color contrast of changes, etc.sony np-fh50 battery

Use bright clothes and subjects of expressions of excitement, intense, direct light contrast, exaggerated body movement, can add photos of vigor.Camcorder Battery