The Lenses
What do we mean by the term "fast lens"?Fast lens is the lens aperture, which has maximal (Maximum Aperture) and for a very wide focal length. For example, the standard lens (50 mm) aperture f1.2 lens is fast, and so on for a telephoto lens of 300 mm if the iris aperture f2.8 or wider.
What does the focal length of the lens (Focal length)?
Focal length of the lens - is the distance between the center of the lens and the point at which it formed a clear picture and sharp prominence to a very distant object (located at infinity). At this point, the cameras are located in the center level of the surface of the film.
What is the zoom lens (Zoom Lens)?
Is the lens focal length has to be capable of change within the scope of a specific and continuous (uninterrupted). And changing the focal length to a change in angle (field) vision.
What are the main disadvantages of the wide-angle lenses (Allowaad Angel)?
Wide-angle lenses have many advantages the most important of the wide depth of field and its ability to capture a wide area of the scene. However, the use of lenses Allowaad bigeye associated with some disadvantages also distort the most important perspective in the scene, where the subjects seem close to the camera than they actually are, and long threads - smaller than the reality.
What are the advantages of fish-eye lens (Fish-eye lens)?
Fish-eye lens specially designed to give the field of view (Angle of view) up to 180 °. This means that the lens recorded the entire hemisphere, which offset, from here should be drawn to the way in order to stop the photographer and his feet do not appear in the scene.
It is known that wide-angle lenses (Wide angle lenses) has many advantages the most important of the wide depth of field and its ability to capture a wide area of the scene.
http://www.foto-master.com/data/oasis/lenses/eq1.gif
However, the use of lenses Allowaad bigeye associated with some disadvantages, such as distorted perspective Perspective in the scene, where the subjects seem close to the camera than they actually are, and long threads - smaller than the reality.
It is more acute with the fish-eye lenses and as due to a very wide viewing angle (180 degrees) the degree of deformation and the curvature of straight lines is very high with the exception of lines of the themes that remain to maintain integrity. The real fish-eye lens gives a circular image on the surface of the film. However, there are some lenses like fish-eye lens Semi-fish eye lens, which gives a picture fill staff
http://www.foto-master.com/data/forums/image/eq2.jpgScene of a real fish eye lens
Remains to say that the areas of use of fish-eye lenses is very narrow and it is limited mostly to portray the huge installations for the purposes of advertising a property, and that this kind of expensive lenses greatly and often there is no reason to buy these lenses. And landscape photography and a very wide angle I would recommend the use of lenses into the fish-like being given a full cadre.
What is the focal length of the lens best suited for facial images (portrait photography)?
In general, the lens focal lengths ranging between 85 mm and 150 mm more suitable for portrait photography. As well as can be seen as 70-150 mm zoom lens is ideal for this type of photography, because they allow the identification of view without moving the camera, and this feature deserves appreciation when the camera is installed on the holder.
Why are surfaces of the lens color when we look at it?
This is because the lens surfaces are coated with a private working to reduce the amount of light reflected from its surface, or apostate, and thus increase the amount of light that reaches the film.
If you're going on a trip filming, and you can only carry three lenses. What is the best among Hoxyark lenses?
Profile is the following options: Wide Angle lens 24 mm, 35-70 mm zoom lens and 80-200 mm zoom lens.
I have heard that the zoom lens does not give rise unit (Sharpness) similar to what we get with the lenses with fixed focal length (Fixed lens). Is this true?
This was the case one hundred percent correct in the past, where the zoom lens was suffering from weakness in the unit's emergence as well as many other defects. But with the great development that took place in the last two decades on the manufacture of lenses, especially zoom lens, and the significant role played by computers in the design of the lenses became this problem is not noticeable, and can now say that the zoom lens of modern give the unit the emergence of very similar what we get with fixed lenses.
Is it worth it, pay more money in order to obtain maximal wider lens aperture?
We recall that the more the aperture Adhamiya (Maximum Aperture) wider, the greater the brightness of the image in the viewfinder, and thus be easier to adjust the focus and check the elements of staff. On the other hand, it is very rare to use a wide aperture such as f1.4 when capturing images. And the lens and the price varies greatly depending on the orifice Adhamiya. For example, the maximal aperture f1.2 lens is much more expensive than the same lens with a focal length but maximal aperture f2.0.
Is the lens converters (Converter Lenses) deserve recognition as a means to increase the focal length of the lens?
The converter lenses of good quality can be an effective way to increase the focal length of lenses with focal lengths ranging from 150-300 mm and significantly. However, these converters is less effective with lens focal lengths are short.
Note should be drawn with other transformers that increase the focal length twice (2X) works to reduce the opening rate of Adhamiya and Agaftin. And converters (1.4X) that increase the focal length by half, it works to reduce the aperture of Adhamiya by a one-stop, while the adapters (3X) increase the focal length by three times as Adhamiya three stops.
When using the lens adapters, it is best to narrow the lens by a pause or Agaftin to overcome some of the phenomena and defects that may arise.
Why note lens openings maximal (Maximum Aperture) different?
Zllk because the greater the complexity of the design of the lens, it has become difficult and very costly work and the maximal aperture wide. Also, the Adhamiya wider aperture lenses with long focal lengths require the use of larger quantities of glass. If we take into consideration that the lenses are made of glass high-purity and quality we can see that this leads to an increase in the cost of the lens is reflected in the price. From here we find that the manufacturers put the same lenses, but lenses of different maximal openings to fit these lenses with the budget of each buyer.
What do we mean by the term "fast lens"?Fast lens is the lens aperture, which has maximal (Maximum Aperture) and for a very wide focal length. For example, the standard lens (50 mm) aperture f1.2 lens is fast, and so on for a telephoto lens of 300 mm if the iris aperture f2.8 or wider.
What does the focal length of the lens (Focal length)?
Focal length of the lens - is the distance between the center of the lens and the point at which it formed a clear picture and sharp prominence to a very distant object (located at infinity). At this point, the cameras are located in the center level of the surface of the film.
What is the zoom lens (Zoom Lens)?
Is the lens focal length has to be capable of change within the scope of a specific and continuous (uninterrupted). And changing the focal length to a change in angle (field) vision.
What are the main disadvantages of the wide-angle lenses (Allowaad Angel)?
Wide-angle lenses have many advantages the most important of the wide depth of field and its ability to capture a wide area of the scene. However, the use of lenses Allowaad bigeye associated with some disadvantages also distort the most important perspective in the scene, where the subjects seem close to the camera than they actually are, and long threads - smaller than the reality.
What are the advantages of fish-eye lens (Fish-eye lens)?
Fish-eye lens specially designed to give the field of view (Angle of view) up to 180 °. This means that the lens recorded the entire hemisphere, which offset, from here should be drawn to the way in order to stop the photographer and his feet do not appear in the scene.
It is known that wide-angle lenses (Wide angle lenses) has many advantages the most important of the wide depth of field and its ability to capture a wide area of the scene.
http://www.foto-master.com/data/oasis/lenses/eq1.gif
However, the use of lenses Allowaad bigeye associated with some disadvantages, such as distorted perspective Perspective in the scene, where the subjects seem close to the camera than they actually are, and long threads - smaller than the reality.
It is more acute with the fish-eye lenses and as due to a very wide viewing angle (180 degrees) the degree of deformation and the curvature of straight lines is very high with the exception of lines of the themes that remain to maintain integrity. The real fish-eye lens gives a circular image on the surface of the film. However, there are some lenses like fish-eye lens Semi-fish eye lens, which gives a picture fill staff
http://www.foto-master.com/data/forums/image/eq2.jpgScene of a real fish eye lens
Remains to say that the areas of use of fish-eye lenses is very narrow and it is limited mostly to portray the huge installations for the purposes of advertising a property, and that this kind of expensive lenses greatly and often there is no reason to buy these lenses. And landscape photography and a very wide angle I would recommend the use of lenses into the fish-like being given a full cadre.
What is the focal length of the lens best suited for facial images (portrait photography)?
In general, the lens focal lengths ranging between 85 mm and 150 mm more suitable for portrait photography. As well as can be seen as 70-150 mm zoom lens is ideal for this type of photography, because they allow the identification of view without moving the camera, and this feature deserves appreciation when the camera is installed on the holder.
Why are surfaces of the lens color when we look at it?
This is because the lens surfaces are coated with a private working to reduce the amount of light reflected from its surface, or apostate, and thus increase the amount of light that reaches the film.
If you're going on a trip filming, and you can only carry three lenses. What is the best among Hoxyark lenses?
Profile is the following options: Wide Angle lens 24 mm, 35-70 mm zoom lens and 80-200 mm zoom lens.
I have heard that the zoom lens does not give rise unit (Sharpness) similar to what we get with the lenses with fixed focal length (Fixed lens). Is this true?
This was the case one hundred percent correct in the past, where the zoom lens was suffering from weakness in the unit's emergence as well as many other defects. But with the great development that took place in the last two decades on the manufacture of lenses, especially zoom lens, and the significant role played by computers in the design of the lenses became this problem is not noticeable, and can now say that the zoom lens of modern give the unit the emergence of very similar what we get with fixed lenses.
Is it worth it, pay more money in order to obtain maximal wider lens aperture?
We recall that the more the aperture Adhamiya (Maximum Aperture) wider, the greater the brightness of the image in the viewfinder, and thus be easier to adjust the focus and check the elements of staff. On the other hand, it is very rare to use a wide aperture such as f1.4 when capturing images. And the lens and the price varies greatly depending on the orifice Adhamiya. For example, the maximal aperture f1.2 lens is much more expensive than the same lens with a focal length but maximal aperture f2.0.
Is the lens converters (Converter Lenses) deserve recognition as a means to increase the focal length of the lens?
The converter lenses of good quality can be an effective way to increase the focal length of lenses with focal lengths ranging from 150-300 mm and significantly. However, these converters is less effective with lens focal lengths are short.
Note should be drawn with other transformers that increase the focal length twice (2X) works to reduce the opening rate of Adhamiya and Agaftin. And converters (1.4X) that increase the focal length by half, it works to reduce the aperture of Adhamiya by a one-stop, while the adapters (3X) increase the focal length by three times as Adhamiya three stops.
When using the lens adapters, it is best to narrow the lens by a pause or Agaftin to overcome some of the phenomena and defects that may arise.
Why note lens openings maximal (Maximum Aperture) different?
Zllk because the greater the complexity of the design of the lens, it has become difficult and very costly work and the maximal aperture wide. Also, the Adhamiya wider aperture lenses with long focal lengths require the use of larger quantities of glass. If we take into consideration that the lenses are made of glass high-purity and quality we can see that this leads to an increase in the cost of the lens is reflected in the price. From here we find that the manufacturers put the same lenses, but lenses of different maximal openings to fit these lenses with the budget of each buyer.
No comments:
Post a Comment