Misunderstandings about photography

1. macro lenses can only take static objects

It is designed for shooting very close distances, but some people say that it may cause quality degradation or superstition to be used only for remake or macro shooting.
In fact, according to some optical tests, when shooting at or, the resolution of the macro lens has excellent performance in most aperture; in tests at or, the resolution is much higher than that of other non-micro-mirror headers with the same focal length. However, the biggest problem with the macro lens is that the focus design is designed for near distance. Therefore, the distance from dozens of centimeters to infinitely far may only need to rotate the focal ring less than 45o, which can be greatly reduced in accuracy, however, the current AF lens is very accurate or can be used to make up for this problem.
Therefore, shooting scenes at a normal distance from a macro lens and even portraits are perfectly normal. f/2.5 or f/2.8 aperture may not be used, because there are usually four corners of the light, this is inevitable, but the first-level aperture can be solved. On the contrary, when shooting the macro, the fine aperture is prone to diffraction, so f/8 to f/11 will be more suitable. But some micro-mirror users will know that the resolution of the micro-mirror is very high, and the picture looks like a bit hard, but each person has their own preferences, whatever you like.

2. Focal Length affects fluoroscopy

Some shooting friends often say that a 20mm lens is quite cool, and a 300mm camera is very compact, saying that all of these have different degrees of attention due to different focal lengths. In fact, there is no relationship between perspective and focal length, and perspective refers to the shrinking effect of light. If you use a wide angle mirror to photograph the whole building from the ground, the lines on both sides of the building will shrink upwards, it is not parallel.

In general, there are three main factors that affect perspective: constant distance. if the camera remains at the same position and angle, and the camera remains the same angle, but the camera will have different Field of View sizes when shooting the same subject at different focal lengths ), the subject has different magnification values, and a longer focal length may have larger magnification values. However, pivoting remains unchanged at all, if you do not believe that you can zoom in or out multiple photos taken with different focal lengths to the same magnification, the ratio of the subject to the background is very similar, that is, the perspective is similar.

Changing the distance between the camera and the subject perspective has nothing to do with the lens focal length, but if the same lens and the same focal length are taken from different subjects and cameras, different perspective effects will occur. Or, when multiple subjects with different focal lengths are shot at the same subject, the shooting distance is changed when the subjects of the same size are captured. As a result, more backgrounds are taken for the subjects of the same size, in contrast, 100mm may have a visual effect close to the human eye, while 200mm may have a photo of the background "COMPRESSED" or close to the subject. Another factor affecting the perspective of the camera and the subject is the camera angle at the time of the scene. If you use a wide angle mirror to take a portrait standing at a low angle, it looks like the upper body is short and the lower body is long, but when shooting from a high angle, it will have the opposite effect. If the camera is taken horizontally toward the subject, the deformation of the perspective will not appear. In the future, people will not misunderstand the above photography problems, but photography is always a very changing thing. There are still many things worth discussing.

3. Wipe lenses frequently

Color friends naturally love their own equipment, seeing a dust on the mirror has been stunned, eager to buy things to clean the camera. Some people may use a gas pump to sweep the dust or blow it away, or even wipe it with a mirror paper or a potion, but this is not very good, unless the stains on the mirror, such as the finger mold, are hard to clean, otherwise, do not rush to use something to wipe the lens surface, because this may make the flower mirror, may also make some film off, but today's film is quite stable, but this is always too dangerous. We recommend that you add a UV or IB skylight filter to the lens for protection. Even if it gets corrupted, you can wipe it at will, or even change it to a new one. How can it be much more cost-effective than making a lens of a floral lens. If you really need it, be careful when buying lens paper or lens cleanser to avoid using alcohol-based detergents, because this will damage the lens and do not drop the detergent on the mirror, if you stream into the lens or the lens edge, the lens will also be broken.
Therefore, the best way is to try to avoid contamination of the two sides of the mirror, if the dust Application Air Pump gently blow away, if the finger or oil stains can be high density cloth or polished leather wipe. If there is mold or moisture condensation (such as air-conditioning places) inside, it is best to return to the original factory Maintenance Center for processing.

4. The most reliable sealing and moisture-proof

When it comes to the rainy season, the mood of friends is the most sad, because the beloved equipment at any time under the tide reimbursement, some people crazy to buy all kinds of moisture-proof supplies, such as suction, dehumidifier and so on. If it rains, we would rather hide the camera lens and turn it into a humidity allergy. In this way, we may not be able to take even a few shots throughout the summer, but it is very sad. Honestly, Shanghai is "wet ". However, closing all the equipment may not be completely moisture-proof, and many people will have experience. The "Old Year" lens in the sealing box will not know how to solve the mold.

In fact, it is necessary to prevent the camera from being moldy. It should not be wet. To stop the camera from being moldy, the first thing to do is to understand why it is moldy. Both wet and dark are the love of mold. However, the bacteria are scattered in the air and cannot be prevented. if they are in a sealed moisture box, if there is a mold, if the moisture-resistant beads are added (usually USING silica gel), there will be a certain amount of moisture extraction effect (but it is not permanent, when saturated, the effect will be completely lost ), although the water absorption effect is obvious, I suggest you be careful to check whether the water is full or broken frequently, and avoid putting the water in a place where the temperature is too high, because water is the same as water, it may be swallowed up.

Therefore, many people prefer to take the camera out to play or use it. Seeing the light can greatly reduce the chance of being moldy. Generally, it is placed in air-conditioned rooms. As long as the air is circulating and the humidity is low, the opportunity for the camera to become moldy is very low. If you really want to hide the equipment for a long period of time, it is best to put the appropriate amount of moisture-proof materials in a low humidity environment, in a sealed box for loading, remember to clean the camera, to avoid bacterial growth. It is said that some electronic moisture prevention devices also play a role, but the price is very expensive.