Photography fisheye fisheye lens lets you capture wide-angle images with a very large field of vision. To do this, use a hemispherical shape, such as fish eyes, to capture a wide range of radius. In the images taken with fish-eye camera lens, looks normal, but outside the central elements of image distortion. The difference between the fisheye lens and wide angle lensImportant to understand the difference between the fisheye and ultra wide-angle lens or ordinary. The main difference is corrected wide-angle lens distortion correction elements, rather than a fish-eye camera lens. Pictures taken with a fisheye lens has an extreme point of 180 degree views and photographs marked "barrel distortion." Angle wide-angle lens, fisheye lens focal length less than the same. Fish-eye lens typeMake sure you choose the right type of fish-eye lens for your needs. There are two types of fisheye lens: the diagonal and circular. A diagonal fisheye lens is often preferred, because they map a 180-degree view of the "diagonal" in your frame sensor, the image area is full of pixels. This is why the diagonal are often called "full-frame fish-eye lens." A circular fisheye lens focal length is shorter than the diagonal to do, and create a circle in the center of the image on the screen of the camera. For the full-frame camera, you need a focal length range is 8 - 10 mm. If you are using a digital camera with APS - C sized sensor, the fish-eye lens, focal length range of 4 or 5 mm is required. Tips and techniques, use of fish-eye lens1. Buy the right lens, the correct sensor size. Most digital camera owners with APS - C sized sensor and crop factor of 1.5 times, 1.6 times as long. For example, if you buy a Canon 15 mm Canon 7D full frame diagonal to you, because you have to make some cool fish-eye image, you will be very disappointed, Canon fisheye. You end up with even a wide-angle lens, the effective focal length of 24mm. (15 mm x 24 mm = 1.6). In order to achieve the "fish-eye effect", you will need a lens with a focal length of 8 or 10mm. General rule of thumb is that if you shoot full frame camera, such as the Canon 5D Mark II or Nikon D700, you need a lens focal length 15 or 16mm. If you are using a camera with APS - C sized sensor, you need 8 after the property range from 11 mm. 2. Choose a scene that will enhance the ultimate fish-eye lens effect the image, such as construction drawings. You can get a real WOW, when produced to capture the interest of large buildings or areas. The use of isolation one in the crowd - it can look spectacular when shooting from above. 3. Is super creative. Large field of view means you can get a perspective that is very unusual for small spaces or inaccessible. Or use the fisheye lens to create a humorous effect, such as extreme close-up farm animals. 4. Think about the composition of your shot. Carefully consider the prospects you want to stand out and can be used to frame the background. One example is the focus of lavender flowers in the foreground of hills or mountains frame the background. 5. Note that each line of the scene, and to ensure straight lines concentrated in the frame. Remember, fish-eye lens distorts any center, so the only straight line are those in the middle of the picture. Away from the center of the tourist routes, the greater the distortion will be. 6. Reduced, improving circulation distorted image. In full extension, creating a circular fisheye images, graphics elements and pressing elements around the outer loop. 7. Reduce the focal length to use wide-angle fisheye lens. Shorter focal length, will reduce the distortion of the final image. When you zoom all the way, you can double-click fisheye wide-angle lens, barrel distortion, but be prepared to accept some of the edge of the image. Fish-eye lens, is not only versatile, you can have a lot of fun with it. So I went out to play!
Wide-angle lens is the subject of landscape photography. Zoom wide angle seems to be the modern standard in everyone's camera bag. Typically, when rendering a large landscape itself, the wide-angle lens is the first time, sometimes only to be used. See "out of the district, including all images" is one of the photos are more popular way. Those who like this style should be regarded as very wide outside, and trying to fish-eye lens.Strict sense of the concept of landscape photography and see the fish-eye lens ridiculous. After all, the extreme distortion and perspective, in fact, you can see more of a gimmick than a serious tool.While this may happen, the fish-eye lens is a tool, I found myself often looking to take contact. I usually wider than normal zoom, but I try to use a fish-eye lens. This may not always succeed, but it happens, the fish eye you can create a "wow" factor to make the image pop.What is clear is that the fish-eye lens, this view is very extensive. In fact, the "very broad" view is too cautious, freakishly large fish-eye lens, so the width of the image may be on their own feet on a regular basis! In view of ordinary people who want to see now how to reach far beyond the range of the growing popularity of 10 - 20mm lens in the sensor model of the emergence of 14 - 24 mm or 17--40 mm full frame. Fish-eye lens, the face of 180 degrees, what this means, you can see in front of you will be included in the picture.I bought a fisheye lens to my travel plans to mountain bromo (East Java). The fish-eye lens is a very different picture, in a narrow canyon. I was not disappointed. As the fish-eye lens, I can see the gaps, in different ways, including more important than ever to the picture. Waves and curves of the narrow canyon, slot is hidden, and even fish-eye distortion. These pictures are the extra things I see is different from other people first. Now the buttonhole of a score!I again used a fisheye lens to capture the entire curve produced another unique image.I started using. A sky full of clouds outstanding, star road, or in bamboo - I have been looking for useful holes. Now the lens is always with me.You have to be careful of your chosen theme and fish-eye lens. Under normal circumstances, this seems a bit close to the wide-angle lens, fish-eye lens is unusual; object 15 meters away, it seems to go up the hill, the distance may be very small picture.Fish-eye in a small space into their own, or when things are very close to the lens. If you want to display something in the vicinity, this is a lens that will be used to do. Fish-eye lens is good, in the woods, valleys, or learning the night sky.Depth of field is also a large fish-eye lens. At f / 8 or f/11 are basically nothing more than a few feet in front of you will be the focus. I usually set the focus to 8 feet, then f/11 camera lens, no focus, just write and shoot.Some of thinking how to use a fisheye lens the image can be distorted, especially at the edge. Tilt the lens up or folded down can actually make things. While this may work in some of the pictures are not. Therefore, even though I really like this lens is not the right tool for every image.I often try to frame the main body of the landscape, to reduce or eliminate distortion. Subjects closer to the center of the picture and away from the edge can help. Sometimes it works, but at other times refers to crop the image. However, I can see more with my fish eye lens, the image cut, because although I have seen usually far more than any other lens can do.You can create distortions in your work. With the right image, highlighting the work of the fisheye distortion, or at least excusable, because the picture. This can be a great way to bring some new life in place, often photographed.I also found a great way to show the location of the camp, I like to do photos, or make fun of the portrait. Distortion become part of what makes an image of the wing and out, in good working condition.If you find any distortion bothers you too much, trying to fix it in Photoshop software to solve many problems. You can work here as well.So, if you are a photographer who likes watching birds, have the opportunity to consider the possibility of holes, and explore how to build a wide-angle zoom lens the image of the outside area is normal. You may be surprised to find that it can generate enormous fun pictures.
In photography, fish-eye lens is a wide-angle lens, in an image, a broad panoramic and hemispherical. Originally developed using weather [1] study cloud formation and so-called "all-sky lens," fish-eye lens quickly became popular in the general photography with its unique appearance, distorted. The photographers often use their vast landscapes to show the curve of the earth. Hemispherical photography is used for many scientific purposes the study plant canopy geometry, and calculate the near-ground solar radiation. Fish-eye lens focal length depends on film format. For the popular 35 mm film format, typical focal length of the fish-eye lens is 8 mm and 10 mm image circle, 15-16 mm full-frame image. For digital cameras use a smaller electronic imaging, such as 1 / 4 "and 1 / 3" format CCD or CMOS sensor, the focal length of the "micro" fish-eye lens, can be as short as 1-2 mm. All ultra-wide-angle lens with a certain amount of barrel distortion. While this can be easily corrected quite a wide viewing angle, ultra wide-angle lens with a straight angle greater than 90 degrees, it is difficult to design. Fisheye lenses achieve extremely wide viewing angle and a straight line image abstinence, choosing instead to a special mapping (for example: angle equisolid), which appeared in the typical convex to the image.Panoramic rotating lens or stitching images (cylindrical perspective) is not a fisheye photo.Directory[Hide]
A type of fish-eye lens 1.1 cycle 1.2 Full screen 1.3 small fish-eye lens 2 Focus 3 Other Uses 4 fish-eye lens to a 35mm camera 4.1 Circular Fisheye 4.2 full-screen fish-eye lens 5 mapping 6 See also 7 References 8 External links [Edit] Types of fish-eye lens In a circular fisheye image circle is written in the film or sensor area, the full-frame fisheye image circle is limited to film or sensor area. In addition, different fisheye images distortions different, and how their distortion of the mapping function is called. A common type for consumer use perspective equisolid.[Edit] NoticeImages taken using a circular fish-eye lensImages taken with a circular fisheye. The first type of fish-eye lens, to the development of "circular fish-eye" - a camera, took place in 180 ° hemisphere and projected this as a circle in the movie screen. Some fish-eye circles in orthographic projection model scientific applications. It has a 180 ° vertical viewing angle, horizontal and diagonal viewing angle is 180 °. Most circular fisheye lens covers a smaller image circle than the straight shot, so the angle of the frame will be completely dark.[Edit] full screen Such as fisheye lenses gained popularity in general photography, camera companies began manufacturing the lens, fisheye image circle expanded to cover the entire 35mm film frame, which is a fish-eye type most frequently used photographers. Angle of the image produced by these lenses only measures 180 degrees when measured from end to end: it has a 180 ° diagonal angle, and horizontal and vertical angle will be smaller, because a wide-angle equisolid mm fish optical head 15, the horizontal field of view is 147 °, the vertical FOV is 94 °. [2] Full-frame fish-eye lens of the first mass-produced by the Nikon 16 mm lens in the early 1970s. Digital cameras and APS - C size sensor needs 10.5 mm lens to get the same effect as a 16mm lens on full frame sensor camera [3]. Because this type of digital technology, widely used, full-frame fish-eye effect can be the camera. The selected images can be digitally changed to become a full-frame fisheye images without the need for special lenses.
Bondi Beach, Sydney: a fish-eye lens of the camera-like results with Nikon D3100
15 mm fish-eye lens (type: equisolid angle), 35 mm film, to reduce the sliding frame
Nikkor 10.5 mm. A good example of a full-frame fish-eye lens used in a closed space
Fisheye Nikkor 10.5 mm (Type: equisolid angle), APS - C sized sensor, cropped to the rectangular
A full-frame lens, fish-eye lens 35mm camera.
A Peilun 8 mm f/3.5 lens. [Edit] miniature fish-eye lens Small fish-eye lens is designed for small-format CCD / CMOS imagers typically used in consumer cameras and security. [4] is a popular format, size 1 / 4 "(active area 3.6mmx2.7mm), 1 / 3" (active area 4.8mmx30.6 mm) and 1 / 2 "(6.6mmx4.8mm active area) according to active imaging area. the same lens, can form a circular image imager (such as 1 / 2 "), and the full-frame on the other (such as 1 / 4").[Edit] Focus Sigma currently makes the 4.5 mm fish-eye lens to capture 180-degree view of the physical plant [5]. Sunex5.6 mm fisheye lens makes shooting 185-degree field of view 1.5 times 1.6 times round the Nikon and Canon SLR cameras. Nikon produce 6 mm circular fisheye lens is originally designed for the Antarctic expedition. It features 220-degree field of vision to capture the entire sky and surrounding ground when pointed straight up. These lenses are no longer in production, Nikon, [6], is the use of interactive virtual reality images such as QuickTime VR and IPIX. As a wide field of view, very large, complex - Weight 5.2 kg (11 pounds), with a diameter of 236 mm (9.3 inches). It dwarfs a regular basis 35 mm SLR camera [7], has its own tripod mounting point, a feature usually present in large numbers, or telephoto lens focal length to reduce the tension, because the weight of the lens mount lenses than cameras.One pair for the 8mm fisheye lens, f/2.8 AIS Nikkor lens mounted on the Nikon F5 body.7.5 mm f/5.6 Fisheye-Nikkor installed in the body of the same year Nikon F.
8 mm fisheye lens, Nikon has made, it has been proven to be used for research purposes, because the equidistant projection (isometric), in which the distance along the radius of the image circle is proportional to the zenith.[Edit] Other usesPicture taken 16 mm full-frame lens fisheye, 35mm format digital SLR, the angle of the square before and after re-mapping tool with panoramic
With the right software, the image produced by the arc of fish-eye lens can be mapped to a traditional linear projection. Although this requires some loss of edge detail of the framework, this technique can produce images with a large field of view than the traditional linear lens. This is especially useful for creating panoramic images. Some planetariums use a fisheye lens to project images in the form of two-dimensional film of the night sky into the interior of the dome. The Navitar's HemiStar6.75 mm fisheye for dome projection. Flight simulator and combat simulator using visual effects, such as fish-eye lens Navitar's HemiStar, to create an immersive environment for pilots, air traffic control, or military training in. Similarly, IMAX ball (formerly "Sky") movement, through the photographic image formats include a circular fish-eye lens, and through the same projection into a hemispherical screen. Scientists and resource managers (for example, biologists, forestry, meteorology) using fisheye lens of hemispherical photography to calculate the index of plant canopy and near-ground solar radiation. Applications include assessment of forest health in winter king butterfly habitat characterization and management of vineyards. Photographers and videographers use fisheye lens, so that they can get a camera action shots as close as possible, but also to capture aspects such as the skateboard set, players still retain the image. Door peephole for a fisheye lens generally includes, providing a broad perspective. Security cameras often tend to have these lenses for the same reason. In computer graphics, the circular fisheye images can be used to create environment maps the physical world. A complete 180-degree wide angle fish-eye images will apply to half-space mapping algorithm, if there is an appropriate application cubic meters. Environment map can be used to create 3D objects and virtual panoramic scenes. [Edit] fish-eye lens to 35 mm camera[Edit] Circular Fisheye
Peleng 8 mm f/3.5 lens Canon FD f/5.6 7.5 mm (note: not the EF mount) (not supplied) Minolta ROKKOR -7.5 mm F4.0 Fisheye Nikkor 8 mm F / 8 lens (not supplied) 7.5 mm f/5.6 Nikkor lens (not supplied) A picture is taken from the entrance of the Louvre Museum 7.5 mm f/5.6 Fisheye-Nikkor lens
8 mm f/2.8 Nikkor lens (not supplied) Nikkor 6 mm f/2.8 lens (not supplied) Sigma EX DG8 mm f/3.5 lens (Sigma 8 mm instead of F / 4 EX DG) Sigma 4.5 mm f/2.8 EX DC HSM lens circular fisheye APS - C sensor Sunex [8] 185 degrees SuperFisheye [9] 5.6 毫米 f/5.6 SLR Vemar12 mm f/5.6 fish eye / ultra-wide angle round the image full frame camera 135 if the points cover in place, 160 degree panorama. Usually as the installation of cameras in the range of T2, but no longer in production. 8-( 15 mm f/4L Canon EF lenses can be used either as a circular fisheye and full-frame fish-eye lens camera, 35mm full-frame) [Edit] full-screen fish-eye lens
AF DX Fisheye 10.5mm f/2.8G-Nikkor ED (full frame on a DX sensor, nearly circular, the FX sensor is essential, if the hood is removed [10] - image circle slightly larger than the frame and There are some planting) at the top and bottom. [11] MC Zenitar16 mm f/2.8 lens (model to choose from: MC Zenitar - K - Pentax Mount; MC Zenitar - M - M42 screwmount; MC Zenitar - H - Nikon mouth) [12] Sigma EX DG15 mm f/2.8 diagonal fisheye lens [13] Sigma 10 mm f/2.8 EX DC HSM lens fish-eye lens APS - C sensor. Tokina 10-17 mm zoom lens f/3.5-4.5 fisheye APS - C sensor Canon EF15 mm f/2.8 lens Canon EF15 mm 8 - F / 4 USM zoom fisheye Minolta / Sony AF16 mm f/2.8 fisheye lens Olympus ZUIKO DIGITAL ED8 mm f/3.5 fisheye lens] of the Four Thirds camera [14] Pentax DA 10 -17 mm f/3.5-4.5 Lens ED (IF) - full-frame image of APS - C sensor K-mount cameras Sanyo optical 8 mm f/3.5 fisheye lens with CS APS - C sensor - Powell is also sold as, polar, Falcon, the same as the Vectra Rokinon 7mm and 6.5 mm lens Opteka. This manual focus lens, and report using three-dimensional projection [15] [16] 8-( 15 mm f/4L Canon EF lenses can be used either as a complete framework and a fish-eye fish-eye camera on the circle, 35mm full-frame, but only as a full-frame EOS Digital SLR cameras on the fish-eye head and APS - C / H size sensor) [Edit] Function Mapping Mapping the location of the object sideways displacement leading to the center of picture image. This conversion is a way of mapping function. From the center of the picture "R" is dependent on the focal length f of the optical system, and optical axis angle '? '.Illustration of the importance of the concept R, F, and variables? In the standard use of the mapping function.
The original channel was photographed, the camera's exterior wall to the left and center.
Gnomonical or perspective: R = Ftan (?). Like a pinhole camera. Lines remain straight (distortion free). "T" must be less than 90 °. Gaged symmetrical with the optical axis and opening angle must be less than 180 °. Large opening angle is difficult to design and lead to higher prices. Fish-eye lens can have many different mapping functions:
Linear scale (equidistant): R = F \ CDOT \ THETA Where? In radians. Practical point of measurement, for example, star maps. Panotools so use this type. Orthography: R = FSIN (?). It looks like a ball and lying on the environment <maximum. 180 ° opening angle. The same area (equisolid angle): R = 2fsin (? / 2). Each pixel subtends the same solid angle, or the same region-wide unit. It looks like a mirror ball, best special effects (high distance), for comparison area (cloud level determined). This type of popular, but it is the object of margin compression. The high price of the lens, but not extreme. Three-dimensional (right): R = 2ftan (? / 2). The map is ideal for photographers, because it does not compress as much as the edge of the object. Sanyo is the only manufacturer not make such a fish-eye lens. These lenses can be based on different brandnames. Mapping software is easy to achieve. Other mapping functions (such as adjustment of the lens distortion) [17] may also improve off-axis resolution fish-eye lens. All types of fisheye lens bend straight lines. Opening angle 180 ° or more may be only a lot of barrel distortion.[Edit] See also
Map projection [Edit] References
^ Hill, R. 1924. A camera shot of the entire sky. Royal Meteorological Society Quarterly 50:227-235. ^ The formula is \ {FOV text} = 4 \ CDOT \ arcsin \ left (\ frac {\ text box the size of the} {} {4 \ CDOT \ text {focus}} \ right) from the reverse mapping function; Dyxum , Gustavo Orensztajn ^ AF DX Fisheye-Nikkor 10.5 mm f/2.8G ED Lens Specifications ^ Miniature fish-eye lens ^ HTTP: / / www.sigma-photo.com/lenses/lenses_all_details.asp?id=3336&navigator=64.5 mm F2.8 EX DC HSM Fisheye notice ^ "Additional information 6 mm f/2.8 Fisheye-Nikkor lens." Malaysia network resources. Access 2008-11-11. ^ "Additional information 6 mm f/2.8 Fisheye-Nikkor lenses: 70 over." Malaysia network resources. Access 2008-11-11. ^ Sunex ^ SuperFisheye ^ [1] ^ AF DX Fisheye 10.5mm ED f/2.8G-Nikkor ^ MC Zenitar ^ Sigma EX DG15 mm f/2.8 diagonal fisheye Olympus ZUIKO DIGITAL ED8 mm f/3.5 fisheye lens ^ ^ "Sanyo 8 mm f/3.5 lens Aspherical IF MC Fish-eye." lenstip.com. Retrieved 14/08/2009. ^ Sanyo 8 mm f/3.5 fisheye lens CS ^ To adjust the lens distortion [Edit] External links Fish-eye image categories:
Fish-eye projection theory Fisheye List Glimpse of the fish-eye distortion effect Fisheye camera
