How do you find the best aperture lens
Sometimes the picture looks very clear after amplification is very hazy, www.photocanvasonline.com.au do you also feel anguish for the details in the images fuzzy? In fact, this is the lens sharpness at work. Today we come to you to answer, what is at the root of such a result, and how to avoid the occurrence of this phenomenon, to help you avoid detours, to break through this problem!
Before discussing this issue, we decided to understand what a photograph is perfect reason? There are for two, one focusing accuracy, the second is the picture sharpness. Sharpness, sometimes also called ‘clarity’, which is an indication of the degree of image clarity and sharpness of image edges. If you increase the sharpness, detail of the image contrast is also higher, it seems clearer. For example, in the case of high sharpness, not only the picture of the human face wrinkles, spots clearer, and facial muscles bulged or recessed will show to life.
According to the physical structure of the lens, if you want to produce the picture is very clear, very sharp feeling, it is necessary to narrow the appropriate aperture, such as the right F / 9, pointer and dial chiseled edge edge timepiece flowers contrast with the background also clear; left F / 3.5, though capable of forming a pocket effect, but you will find that the dial have lost their sharp sense of making the pointer and the dial seems stuck together. This shows that the lens aperture can affect the sharpness of the picture, which is very important, we will continue to the next instructions.
Know Your Lens
In order to facilitate beginners to understand, we used an entry-level zoom lens as an example. Engine identified as Canon 18-55mm zoom lens, the maximum aperture of the lens in front of the description of this lens due to the different focal lengths and changes in the scope of change between F / 3.5 to F / 5.6. When we try to find the best aperture of this lens (aperture means in this footage to achieve optimal sharpness), we can follow a domestic law, first find the maximum aperture of this lens, then narrow two left and right, F / 7 is perhaps the best aperture of this lens.
This is because aberrations with increasing pore size increased dramatically, so the image quality deteriorates. In addition, the small aperture will produce diffraction image so that the image quality is lowered. Therefore, the optimal aperture value is to avoid the emergence of these two is like a balance, that is one to two low maximum aperture value.
However, the best aperture is not an absolute value, but a range, from the best aperture to small aperture than the two branches are likely to capture the sharpest images, so the best example of this lens aperture In fact, the range is F / 7 to F / 10. According to the results out of the experience obtained is not necessarily accurate, so you can simply test it, but as you want to test, you need right to use the aperture priority mode.
In order to facilitate the novice’s learning, we briefly explain the use of aperture priority mode, and veterans who can ignore this section.
The camera switches to aperture priority mode, just need to dial to Av (A or file), by adjusting the dial, you can adjust the aperture value set on the camera.
Using the Aperture Priority mode
Aperture priority mode enables you to take the initiative to set the aperture size through this adjustment, you can more intuitively grasp the relationship between sharpness and aperture size. Also, because the aperture priority mode according to your chosen aperture to adjust the appropriate ISO and shutter speed, so it is also quite simple to use.
Myth: You may have heard a saying – when the smallest aperture lens (such as F / 16 or F / 22) would be the clearest picture. In fact, this is a misunderstanding, not only because of the size of the aperture determines the sharpness of the picture, it also determines the depth of field of the screen, just above this sentence proves the smaller the aperture deeper depth of field (focal length constant case), that is, so that each part of the screen are correct focus, so it looks more clear.
Focusing accuracy does not mean sharpness high, although both can inspire people with rich visual experience, but only select the appropriate aperture to be able to make your picture more sharp.
We carefully observe the needles and cast off the shadow of pine trees, you will find the edge of the edge F / 22 lower than under F / 9 more viscous, blurred. This description is not smaller the aperture, the picture will be sharper.
Find the best aperture lens
We started testing the optimum aperture value of the lens, in order to exclude blur caused by camera shake, use a tripod. First, adjust your camera to aperture priority mode, fixed on a tripod, and then identify a suitable target (preferably has a foreground and background), in decreasing order of aperture size shooting.
Finally, upload your photos to the computer with the display magnification observation, this is the case, you will be able to quickly find the difference between singular sharpness under the aperture.
This is a little bit girl in natural light shooting conditions, just find the best aperture lens, even in low light conditions we can still get nice sharp picture.
Do not over
Through some of the above explanation, I believe that you have managed to find their own best aperture of the lens. However, we must remember that the sharpness is not the higher the better. If the sharpness too high, will appear in the dark edge of the screen white trim, image distortion and glare look, you can see the picture sharpness can be improved optical clarity, but over-sharpening will make photo-aliasing.
The key is to find the right sharpness effect to the picture, I hope we can in their personal shooting gradually mastered it!
How do you find the best aperture lens