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Nikon AF-S FISHEYE NIKKOR 10.5mm f/2.8G IF ED

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Lens design also had to assure that the image resolution performance would not be degraded even if the aspherical surface was imperfect. Aspherical lens mass production technology, while productivity was much lower than it is today, still existed. A model with excellent optical quality is essential in panoramic photography. Since you’re going to be working with a closed diaphragm to achieve maximum depth of field, you’ll experience diffraction effects and a slight loss in sharpness. Hence, make sure that the model you choose has excellent center sharpness. Pros and Cons of Fisheye Lenses

Fisheye lenses are of two types – circular fisheyes and full-field diagonal fisheyes. Diagonal fisheyes create an image circle that covers the image sensor completely, resulting in an image that has a full-sized, regular, rectangular shape.Due to its incredibly wide field of view, you can get down and up close to your subject to exaggerate the perspective. This results in a low angle that cannot be achieved with a normal lens, creating something truly bold and unique. Avoid Distortion With a Sharp Central Composition Nikon doesn’t have any dedicated Z-mount fisheyes yet. Presumably, you could use an FTZ mount adapter, but it’s not a combination I’ve experimented with personally. [ ↩]

A fisheye lens is an extreme wide-angle lens that makes the world appear in fun and creative ways. Also known as a super-wide lens, the model captures an incredibly wide image, usually around 180 degrees. The resulting images are highly distorted and have a more abstract, dynamic look. From September 1960 this system became available in our Japanese catalogues as the "Camera with Fisheye Nikkor". Note that there are limitations. This lens does not have a built-in autofocus motor and thus relies on the camera’s motor for autofocus. But not all Nikon camera bodies have that built-in. It mainly affects older models and lower models (such as the Nikon D3X00 and D5X000 series in the DX bodies.) The lens will work on those cameras, but it will have to be manually focused. [ ↩] Now let's look at the unique characteristics of this lens in terms of design. First, I think you'll notice that the structure of the entire optical system is incredibly simple. The first and second lens elements are concave to generate excessive negative distortion. This structure offers strong negative refractive power, while the use of only concave lens elements and adoption of the optimal meniscus shape ensures the proper passage of light through the lens and suppresses aberration generation. The doublet behind these provides compensation for spherical aberration, coma, and chromatic aberration. The aperture is inserted, and the structure of the rear group is also simple. With two sets of doublets, aberrations generated both on- and off-axis are suppressed for consistent rendering performance to the edges of the frame. Since years have passed since the lens was manufactured, colors are slightly yellowish, but as you can see from the samples, not severely. There should be no practical problems with used with reversal film.

Oct 4: If you shoot with a Ricoh GR camera, whether film or digital, Pentax/Ricoh have announced the 2023 GR Photo Festival 2023. You can find information about entering it here. Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens. In the age of rangefinder cameras, the refractive power arrangement of lenses utilized a "symmetrical lens" structure that was nearly symmetrical. This symmetrical lens structure provides better compensation for distortion and curvature of field than does the retrofocus structure. However, if we consider the common projection formula (y=f·tan θ) with fisheye lenses, excessive negative distortion is generated. Therefore, it can be said that the retrofocus structure is the optimal structure for fisheye lenses. The maximum aperture is f/5.6, which is a rather small aperture, but the image resolution is extremely sharp even to image corners. It has no focusing mechanism, and the focal length is a short 10mm, so there is no out-of-focus even with close objects. The image will be adequately sharp up through about 50cm (1.6 ft.) from the lens even at maximum aperture.

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