Computer Repairs and Maintenance

Macro film camera before, or use the macro lens

admin — Fri, 17 Feb 2012 01:50:23 +0000

Macro film camera before, or use the macro lens, or using large telephoto lenses, the difference in price is not cheap, but for digital cameras, even many low-end commercial-grade digital cameras, are equipped with a macro and even super macro function, although a professional macro photography can not be compared, but the macro will let you try the world’s beautiful.price of Dell Vostro 1000 battery If you have not tried to shoot macro, please come with me.

Macro is a beautiful world, because the macro can zoom in the microscopic world, visual access is that we do not see everyday things, so a more visual impact. Macro themes are broad, raised flower pots, kitchen vegetable plate was cut vegetables, home decorations, roof falling water drops, the grass downstairs in the insect world … …

Note the time of shooting:

If the shooting flowers and still life class, you can very carefully consider the light and shape. Large aperture can help you get great shallow depth of field, and has a large transmittance, the film is not easy to empty out, and can obtain aesthetic results. But since the microscopic world, the camera between the lens and the subject matter has been very close,battery for Dell Inspiron Mini 9 is likely to cover part of the light, so the secondary just indispensable. If indoors, use the power of household lamps and the like, as incandescent or fluorescent light is not important, because the DC comes with white balance adjustment, a big deal try several times. In addition, a white paper used to fill light is also good suggestions. In order to obtain a clear picture, the auxiliary frame the camera steady tripod, monopod is essential.

If the subject is afraid to disturb the small insects and fast action, high-speed shutter is the first element. There are three ways to get high-speed shutter, one using a large aperture, through the amount of light was enough for the shutter speed to be increased accordingly. Second, use high ISO, but the high ISO images will result in more rough, grainy strengthened, as the performance of the microscopic world must be some good detail, so unless the high ISO images can be fine enough (like Canon 300D can also be under the ISO800 the film to be transparent), or not recommended. The third is to use flash, for example, a feeling of depth to take a clear picture of locusts, and only through a small aperture to get, but the negative effect of a small aperture is the light and the shutter speed to reduce the amount of the reduction, while small animals do not act fast give you the opportunity to play supporting long out light, flash is the only option,CASIO np-60 Replacement battery and promptly. In order to avoid overexposure direct, please add the flash diffusers.

Need it tips:

1. The use of remote or cable release will help get a clear picture, or use the camera self-timer function.

2. Metering and spot metering focus mode do not have as much as possible, but when measured as measured in the focal point are not allowed. DC General’s consumer manual focus function is weak, and in the subject matter not easy to focus on smaller, you can watch at the same distance from the hand like a bigger object to aid focus.

3. Use the LCD viewfinder, because the macro itself must take the subject matter with very close, and then use the viewfinder is not only indecent posture, the key is not easy to end the camera steady. The use of LCD viewfinder, allowing the photographer to compose a very calm and easy to see the final effect of the shallow depth of field.

4. Note that the background. Although the macro can generally be a good virtual background, but it should also pay attention to the seams between the background object,HP Compaq Business Notebook NX6140 Replacement battery and sometimes believe it will undermine the overall effect.

5. Ingenious with different photographic equipment. Some colleagues in the successful use of E20P reverse with headers, then reverse the header to become a magnifying glass, you can get a better macro results, despite the imaging with a black circle, with large resolution can be cut the.

6. Properly try backlighting effect. Especially the thin edge of the plants through the flowers, leaves and the like, backlight will show a special beauty.

7. Tourist attractions, such as wind erosion of stone, rusty locks and the like, in the Macro shooting will show a strong texture.

Carry essential items:

Black cloth: artificial arrangements to facilitate the background, highlighting the principal photography.

White, white cardboard (with a certain hardness), a small clip: One can easily fill light,Compaq Presario v6000 Battery and second, to wind, to prevent the flowers sway in the wind.

Water, small watering can: when the film unique to plants, spray some water cause the picture to special aura, a simpler solution is to take mineral water, water spray mouth about the most convenient.

3389 port love machine into a “meat (birds)

admin — Thu, 16 Feb 2012 03:44:59 +0000

3389 port love machine into a “meat (birds)
MM’s computers have been hacked! Trojan invasion, the destruction of the virus, why control. Anti-virus software is not the police, the network firewall does not appear abnormal. In the end this is going on? The original of all all MM administrator account does not set a password and open a remote desktop to blame. How should we do? Not afraid, MM’s own hero to save, to see how our hero MM block this vulnerability is not “loophole”.
Current Hero: Cham hero Source: Nanning
3389 port is not easily open weekdays and I talk enthusiastically MM QQ, there are many, but the recent discovery of MM and my video is always a sudden discontinuity line, and really ruin my day! Finally flatter her connected to the video, but to a temporary disappearance, how can almost get antsy? It seems really want to ask her why she keeps up like this!
“How old are you suddenly shut QQ ah!” MM very reluctant to answer: “Recently, the computer will always be automatically written off, let me re-login system”. At this time I suddenly have a feeling MM computer should be as meat (bird)! On computer security Well, I understand the point, might be able to help the MM, at least in front of her remarkable show their skills! Without further ado, quickly asked MM to some problems. “You look at your 3389 port open?” 3389 port? “MM confused in the … hey! Do not be so much trouble, it appears that she did not understand my words. “You do so, move the mouse to ‘My Computer’, right → Properties → Remote to see if that allows users to connect remotely to this computer, the front is not playing the hook?” I want to say the that.
“When I first take a look.” After a while, MM ticked (pictured), I asked her to remove, and then point the application can be determined. However, the MM said,HP Probook 4720s battery this is the last man friends call me hook, hook, he can help me get the computer. Really seems MM effect, so to remind her, for use to check the “Allow users to connect remotely to this computer, after it’s happened to remove the hook, if open, that is to open the 3389 port.
Little knowledge of the: 3389 port is a Terminal Services, can be understood as the computer simulation into your computer for remote control and the use of a port. Under normal circumstances, the 3389 port is turned off, but if you want to use such as QQ remote control type of operation must open it. MM in computer security is relatively weak, if hacked, he can in the compromised computer on any action, such as formatting your hard drive, install a Trojan horse to steal your QQ number game account, install the gray pigeons future long-term invasion intend to do (if installed gray pigeons and other remote control software, also did not use even close 3389 port), peek at your diary., your computer makes any mercy. ” meat (bird) “. To remind MM, 3389 port can not be easily opened.
Channel of the intruder – 3389 port first of all they will use port scannadopt the default administrator account (Administrator) plus an empty password to keep trying,HP EliteBook 2760P battery failed computer, but according to this method to find an hour a conservative estimate can invade 1 to 2 computers. I have just introduced is the intrusion method is the easiest and most effective method for personal PC. This low-tech methods, as long as we give the Administrator account plus password.
MM Weapon treating the symptoms but also cure, I found that MM’s computer does not set a password to the Administrator account, she had to add a password. I suggest that MM have to give this account to set up a more complex password. The specific method is the Windows XP system, for example: Go to Control Panel → User Accounts → point “Administrator” → create a password, then I do not say, Follow the screen prompts did you.Dell Precision M90 battery
After setting your computer more secure!
Finally, once again remind the majority of MM, and usually do not open the 3389 port; to give the Administrator account with a more complex password. This can effectively prevent an intruder from the 3389 port to enter everyone’s system. 3389 port intrusion instance
First open WINNTAutoAttack, see the “IP Range Start IP and End IP Office to enter an IP segment, for example, fill in 219.159.159.0 to 219.159.168.255.
Machine for testing and then see the “Settings” tab, check the “only Ping check is successful”, 3 “test 3389 port” and “collect NetBios information”.
The last point of the “Start” button, so the software will begin a multi-threaded scanning.
Look, open the 3389 port of the computer quite a lot.
Then open with Windows XP Remote Desktop Connection (Start → All Programs → Accessories → Communications → Remote Desktop Connection can be found), enter the IP address, click “Connect” button.
Look at the connection on, and then enter the user name blank passwords. User name, enter the Administrator password below do not fill in the points below the “OK” button.

How to take photo with effects of the explosion

admin — Thu, 16 Feb 2012 01:50:17 +0000

How to take photo with effects of the explosion

SLR advantages compared to regular DC, in addition to better picture quality, but also has a fast zoom, fast focus feature, which makes shooting in addition to conventional SLR camera we can achieve creative shooting outside, the explosion effect is one.

Explosions are also other kinds of name for the screen with the impact, people’s attention to focus on objects, specifically through the zoom lens during the exposure achieved.

Shooting explosions, is essential for a zoom lens, with zoom lens to create a picture with the impact, but the main lens or the light, so fast rotation schedule be effective enough to make the picture,compaq presario v3000 Replacement battery 400D of the sets have a good lens can make the explosive effects.

Second best to stabilize the camera using a tripod to ensure the focus does not shift, or even had a blast effect, it tends to lead off the central focus of the focus, of course, use a tripod, mobility is greatly reduced. Manual exposure, aperture and shutter control the value, the main parameters to set the shutter, generally 1 / 10 second exposure time is to show the effect of the explosion, with the shutter aperture value is set, if the fear left the zoom speed not fast enough shutter speed can be reduced, slow shutter better performance results.

Wide-angle zoom raised before the end of framing, after the completion of composition transferred to the appropriate telephoto position, half-press the shutter focus to complete the focus, the right-hand man to tie his right hand while pressing the shutter, zoom, rotate left quickly ring, raised from the wide-angle end of the telephoto end, rotation speed as even as possible,HP EliteBook 6930p laptop battery so that effects of the explosion shot out of a lot better.

How to shoot silhouette

Usually we take a picture, always ask for exposure accuracy, the main correct exposure, adjust the screen light ratio, not backlit shooting. But sometimes there will be backlit but not the same as shooting great. This is the silhouette. Lack of exposure by having the subject, highlighting the main outline, then the need for a larger environment of light, very easy to shoot the sky’s the silhouette effect, but often we always want to shoot pictures when the subject clear, taken the initiative to give the silhouette photo.

Silhouette shooting photos, demand is not high, choose a good background is key, the main structure of the outline and needs known, if the subject is a human, you need to design a good action. Subject and background light to produce high contrast, backlit film is a good choice.

Shooting method is simple to use manual exposure or aperture priority M file A file,NIKON en-el5 battery or even exposure of P file program can do a good silhouette. Set the camera’s metering mode to Evaluative metering, the metering value is the average of entire frame range, the higher the background light, even if the exposure is to achieve normal silhouette.

In order not to make too much of the main details of the reservation, we can press the exposure compensation button, lower 1/3-2/3 of the exposure value, so the main outline more clearly demonstrated.

It is noteworthy that silhouette is usually taken in backlit environments, there will have the possibility of glare, the figure which appeared glare proof, which is to be avoided, effective way is to avoid shooting a point source, plus loaded hood is a good choice, of course, not all conditions are effective to avoid the glare is a more common practice.

How to shoot outside and focus blur effect

1, focus, shooting skills

When we were shooting all the time usually required picture clarity, focus accuracy, sharpness enough, but the fact of-focus photography Aspect also has its own unique, especially the urban night,TOSHIBA PA3399U-1BAS Replacement battery mottled light if used in the focus, but it is gorgeous . And coke, shooting less demanding, can easily be done using the 400D.

Focus outside shooting landscapes, we only need to set the lens to manual focus, aperture opening as large as possible can make the light source into a round, as is the focus, the hand to bring the fuzzy sense of vibration can be ignored, so the slower the shutter it does not matter to handheld shooting, there is a need to better support the use of a tripod, shooting at night, using the M-speed manual exposure, set the shutter for the aperture value.

2, the blur effect of shooting tips

For moving objects, when we do not need the words of the principal coagulation time, increase the blur deliberately make pictures more interesting, highlighting the speed of the object, when shooting night scenes, more prominent left by the traffic coming and going light path.

Like this picture, we only need to use the M file, according to the speed of moving objects to speculate how much exposure time, for example, set the shutter speed above 1 / 10 second, relatively fast-moving subway, 1 / 10 seconds have already moved 1,2 m, leaving a light can be dragged out of the blur.

Issue Summary:

Canon 400D has been delisted as a camera, has a broad user base, although when compared with the new SLR cameras, features and performance are lacking, but as the SLR, you can still create a good work.

“Seven” led to the Internet cafe business failure

admin — Wed, 15 Feb 2012 03:33:39 +0000

“Seven” led to the Internet cafe business failure
Batch after batch of Internet cafes construction, opening, batch after batch of Internet cafes recession, shut down.
Some thriving, some of the setting sun. The beginning of an ambitious, the outcome was very different.
Summarize the successful experience of the Internet cafe operators is not an easy task, because the winners of Internet cafes have different business management, Internet cafes, a loser, but with many similar, is summed up in “led to the seven deadly sins of Internet cafe business failure.” Not Abide by the Rules
Business Internet cafes do not abide by regulations like carries a time bomb, at any time can lead to the demise of the Internet cafes. Pull lines, buy a few computers, I started cafes, no matter what business administration, no matter what the security risks … the fire as “Lan Ji Su” Internet cafes in Beijing, all foam seems to have disappeared, followed by the Management Ordinance of the Internet service business premises, after more stringent regulations for Internet cafe management throughout the file are also springing up, like the promulgation, Internet has become the focus of regulation. Some Internet cafes operate in order to seek temporary interests, in violation of regulations, such as non-compliance with restrictions on business hours,Compaq TC4200 battery allow minors to enter, browse pornographic websites and information outside the specified time, the fire safety there are significant risks, etc., these will incur a fine or even revoke the license processing, the responsible person may be held criminally responsible.
Mismanagement regardless of cafes size, whether the chain and its management are extremely important, and some small cafes Although there is no large cafes magnificent, but still operating in good order, business is booming, this is the management in place results. Management of Internet cafes to cover the store management, advertising, customer service, billing charges, equipment maintenance, safety and health rules and regulations, social relations, a number of aspects, regardless of which out of the normal development of the flaws will affect the business activities.
The popular “meticulous management, cafe management also needs to implement this idea. Some employees of the cafes, the boss is conscientious, and the boss is not Shique so-so, in staff management. Do not look at the management of Internet cafes, Internet cafe owners have affinity and leadership, not only to unite the clerk, but also to attract customers. The success of management means lower costs, expansion of business volume growth, revenues and profits. In an increasingly competitive Internet market,HP G65 battery the management of poor make Internet cafes operating gradually downhill, and ultimately to avoid the fate of not closed.
Operates in a single foreign Internet cafe operators have already embarked on the road of diversification, many domestic Internet cafes are also successful transformation, the increasingly rich business content, a simple Internet access charges account for the proportion of total income of the cafes is becoming less and less. If you run Internet cafes still rely on internet access to hard to support you need for serious thought about the whole thing.
Exploration of some Internet cafes diversification from the chief to sell mineral water and instant noodles began, and later gradually to provide a variety of game cards sales, DVD and other services. Large-scale foreign cafes and some Internet cafes in from the outset to provide a wealth of diversified services. Service of computer peripherals including printing,Dell XPS M170 Replacement battery copying, scanning, CD burning, etc.; catering services, including coffee, fast food, etc.; game industry cooperative ventures, including the sale of game cards, new game promotions, games and competitions; network technology services including computer systems upgrade system reinstall, viruses, and mounting hardware. The single operation of Internet cafes can adhere to today, it is not easy, but to face the pressure of the diversification of Internet cafes bring What are the advantages of a single operator?
The high cost of revenue – cost = profit “in the most simple accounting formula, we see very clearly, only the maximum to reduce costs in order to maximize profit.
Costs do not only need to consider the establishment of Internet cafes in the beginning, it runs through the Internet cafe operators always. Order to reduce costs, the choice of low price, poor quality, poor after-sales service of equipment, it will only increase operating costs, purchase of hardware to consider price, performance and service, can not simply choose the low-priced products. For example, in the choice of mouse, keyboard, headphones and other consumables, durable, long warranty, the principle of a good product, price difference twice use three times the difference between products, The purchase cost is high means that the use of lower costs, and total costs will fall. Some Internet cafes one-sided pursuit of lower costs of fixed assets, billing charges and rely on labor, resulting in revenue “leakage” of these losses add up to even more than buy a complete set of billing charges system, which is typical disguised costs are too high. Similar problems are endemic, in order to save money has led to the high cost of Internet cafe operators, this has become a major threat to the cafes survival.
Utterly been to the friends of the European and American Internet cafes have a feeling that Europe and the United States cafes regardless of size, is full of flavor, not only clean, warm, and there are strong themes and characteristics, culture.Compaq NX9010 battery Foreign owners are paying more attention to the environment of Internet cafes, Internet cafes, the environment has become cafe owners manifestation of personality and assertive, especially a variety of image design and logo design.
Some big cities in the Internet cafe from the very beginning there are obvious features, has a strong feature of business philosophy this way, a happy thing, because the cafe operators is not simply the management of Internet cafes, but to operate an idea, a culture, a characteristic. Most medium and small cafes or an Internet service establishments, middle and low Internet cafes are generally located in the vicinity of schools, their target customers are primarily students with lower level of consumption, these cafes lack the elaborately decorated, and some can only be described as humble to , no features to speak of. Characteristics, culture, cafes, and also be able to survive long? Some small cafes are facing a “characteristic” crisis, we do not catch up, survival and development will be restricted.
Backward “, the most heard word in the Internet cafe operators, but is capable of caring services, heart services, all from the user perspective, cafes, how much? I had been to a foreign cafe, the cafe for the convenience of travelers, providing free luggage storage, parcel collection of mail service, very thoughtful consideration to attract a large number of tourists to the internet cafe.
Internet cafes abroad, regardless of their size, generally will have a dedicated website. Marked the cafes location map on the site has, and describes the reach Internet cafes can take the vehicle or subway, and also Internet cafes offer a variety of services, hours of operation, the prices are on the website. Although some foreign Internet cafe website is very simple, but very practical in Taiwan to work in this area is a little negligence, we are not doing enough to be seen on the level of awareness of customer service. Quality service is absolutely not a slogan, but the real action, the owners of Internet cafes can ask yourself a few questions: We give foreign tourists What services are provided? We can give to families with children access to the Internet what services?
Quality service brought more than just customer convenience and satisfaction, but also have more repeat customers and revenue.Toshiba PA3465U-1BRS replacement battery Lack of innovation
In the Internet cafe business, we often enter a vicious circle, or wandering the old established ideas repeatedly, or followed the ideas of others learn while ignoring the self-innovation. Free Internet cafe in a foreign country, but the profits are very generous. Contradiction? Is not contradictory. There is such a community cafe, in the United States and operators to provide free Internet service to the people of the community. These Internet cafes will also engage in game play for children to engage in the training of online shopping for housewives, these activities appear to be the public good, can get the sponsorship of the game makers and the sponsorship of the shopping sites, such “free” business model will not only be able to attract a large number of community online, but also to Internet cafes to become an important place for community gatherings.
Free Internet access, hot phenomenon, commercial sponsorship followed, revenue and profit naturally not be a problem. This is to operate a typical example of the innovation. Innovative means to reduce costs, create wealth and do not know how innovative business only in a backward position in the Internet cafe competition. The seven deadly sins of these is the Internet cafe business failure, it is worth careful consideration of each Internet cafe owners should now strive to avoid the seven aspects of the problem. This knowledge of the Internet cafe operators will become more profound in the actual operation of the Internet cafe business failure, this tragic outcome will be away from you.

Fireworks can be described as more difficult to shoot subjects in a class,

admin — Wed, 15 Feb 2012 02:37:17 +0000

Fireworks can be described as more difficult to shoot subjects in a class, first it is dynamic, which requires us to take into account the exposure time and the second will

affect the surrounding environment, the observability of the photo, there are also such factors as weather the effect of the shooting.
With the general night shooting of fireworks is very difficult to photograph satisfactorily, and needs to take into account the height, size, speed settings, aperture, shutter

speed and so on, if the lack of experience, all good grasp.IBM ThinkPad R60 laptop battery Comprehensive test of the photographer’s technology, opportunities to see nature and composition. Because fireworks

are dynamic and irregular, and give a simple example: a site launched with two of the same species of fireworks will not bloom at the same height and position, even not the

same size, there is randomness. Beautiful fireworks fleeting, when you rush, when the fireworks have disappeared in the night sky brightness under a different shape and

duration of the fireworks turn to the. You never know how the next kind of fireworks.
If you have some skills in making fireworks, it touches help to reduce the waste film shooting rate.
First, we must clearly understand that the shutter the camera will record the time at the track all the lighting, and set in a photograph, while the shooting range in the

strength of the various positions of different intensity of light throughout the contrast for photo appear bright or dim, and our eyes see is not the same. The principle of

photographic experience in general people will know.price of ACER Aspire 5738G battery Then we can learn the skills of shooting fireworks.
First, the preparatory work: tripod, cable release, black cardboard, location, wind direction and wind.
Sufficient battery power, tripod and remote shutter cable release or to bring the best, because it is low-light shooting, need a long shutter exposure time. If necessary and

then put on a black cardboard, its role in the following description of the fourth point again.
Then, shoot fireworks site is selected, if the big scene to shoot the fireworks, the best height, while nearby buildings had to play the role of the fireworks set off even more

interesting, because from the simple principle of composition, there are reference more vivid contrast to the picture, if only shooting fireworks, you can not make the audience

know how the fireworks, with the buildings contrast,Dell Inspiron 1420 battery it will become even more spectacular fireworks. When shooting landscapes to mean that we need to put some people sometimes

shoot into the same. If the best qualified proposal to step on point during the day.
Also note that the weather that day, pay attention to wind direction and wind, windy weather is a good day for shooting fireworks. Air humidity and high visibility is also

conducive to the shooting of fireworks. However, if the wind is not enough or no wind you will have trouble shooting it, because there will be fireworks and the release of

smoke have finished, the smoke will be dispersed as soon as possible if you do not reduce or even cut off the next fireworks effect. I have encountered in Zhanjiang, a

fireworks show, there was no wind, fireworks and put too close,JVC bn-v114 laptop battery the result can only see the foggy all the fireworks exploded the moment the bright spot, but do not see the

fireworks and open process, do not that shot. So the weather event of such plans or cancel the shoot it, then it would have to shoot a few fireworks to seize the top.
Also try not to shoot at the upwind and downwind location of the fireworks, if wind-borne smoke will affect your line of sight to the wind, then the white smoke after the

fireworks into the background, the bright light of fireworks.
Second, the shooting parameter settings: focus, white balance, sensitivity, shutter speed, aperture, metering techniques
Find a good location, good tripod stand, connected to the shutter release, the next parameter is the default shooting.
Let me talk about some of the more fixed parameters, the focal length manual focus mode is set to infinity; This is because you do not know the location at which the fireworks

will be open, you can not know in advance the focus. White balance settings for machine-specific, because different brands and models of machines may have some differences. If

a digital machine can wait for the fireworks show the process of trying to pre-model or warm fluorescent light shooting mode to try two, and then compare them more to behold

your appetite Zhang is still not satisfied,Dell INSPIRON 2500 Replacement battery then you can further fine-tuning, the general digital SLR will have white balance fine-tuning the machine functions.
Camera sensitivity (ISO) setting is not too high and too low, too high will generate noise and affect the photo quality, low shutter speed shooting the impact or lead to

underexposure. In the author’s experience, sensitivity is set between ISO 200 to ISO 400 would be more appropriate.
Exposure of the remaining portfolio is most difficult to control: the aperture and shutter settings. We seize the most important point: that the planning of the fireworks

display with a certain regularity, not all of a sudden blossom, while a rise to explosions of fireworks from time to disappear usually takes five to six seconds, and the most

beautiful time should be 2,3 seconds before the time. Therefore, we control the shutter time like this time, of course, the fireworks have different different exceptions, short

observation is important, if we want to take a full fireworks, but can not let the fireworks of the next screen, then To open the shutter when the fireworks up the next

fireworks fireworks occurs even before it disappeared in the closed shutter.
So how to set the exposure combination of it? This describes a technique for the novice, before the fireworks display began on the surrounding environment with the camera

metering, if there is a bright neon lights as a reference better, shooting mode,battery for Dell Inspiron 9400 first hit the shutter priority mode “S”, the shutter transferred to 2 to 3 seconds, then you

get the aperture value, such as F8, but this is not shooting fireworks aperture used, since the brightness of the fireworks when the outbreak of the environment you would

surely be high, so good, we look for imaginary the brightness of the fireworks in the aperture on the further increase to transferred to F11. Well, experience tells us that if

the smaller the aperture value, then the requirements of the shutter time will be smaller, meaning that the shutter with adjustable rate will be. But if you have neon lights

from the buildings close to the location, then the fireworks will be relatively dark sky, then you need to adjust the aperture a little bit, there is no need to be too much,

because then the performance might not be the object of fireworks.
Well, then we can hit the manual shooting mode “M”, set above the aperture F11, shutter doors open to the B (if B does not have the door to the longest exposure time used in

that file) and wait fireworks appear. When taken to the first films, if not satisfied, you can immediately adjust the aperture value.