The general colour scheme is black, white and orange. The AF-D lenses are almost always black bodied plastic construction. Canon changed its lens mount when introducing Autofocus lenses to the market. The older FD lenses are not compatible with newer cameras, and vice versa. The older type lens mount usually found on earlier FD lenses. The entire silver ring rotates to attach the lens, whist the body and glass of the lens remains stationary — rather than rotating the lens to attach it to the camera as most modern lenses do.
New FD is the later style Canon FD mount lenses, which changed the way of mounting lenses to the more standard approach — rotating the entire lens to attach it to the camera, with a locking button. Red dot to help locate the mounting position, both at the rear and on the barrel of the lens. The aperture cannot be moved or activated unless the lens is mounted to a camera. The easiest way to determine the mount is to look at the contacts — they always remain visually identical. The aperture cannot be activated or controlled at all by physical controls on the lens.
There is only a switch to control autofocus and maybe IS. The rear of the lens can be plastic, as in this example, or metal. Pentax began with the classic Spotmatic series of cameras, using the ever popular M42 screw mount. The mount is easy and cheap to produce, and present on many cameras, but lacks any advanced features. They later changed to their own Pentax K mount, which has several iterations — the most common being M, A, and their autofocus lenses, F and FA.
Nikon used the CRC system is used in fisheye lenses, wide-angle lenses, Micro macro lenses, and a few medium telephoto lenses starting in The profile of an aspherical element does not conform to the surface of a sphere. Aspherical elements are used to correct coma and various other types of lens aberrations but are costly and complex to manufacture.
Aspherical elements first began to appear in Nikon lenses in and some older lenses feature this designation externally. Modern-day lenses may feature the AS designation within the lens specifications, but it is not written externally on the lens anymore.
N lens elements are coated in nano-sized crystallized particles which dramatically reduce inter-element reflection within a lens and also help reduce ghosting and flare which can be problematic in wide-angle lenses in particular.
Not used in any modern Nikkor lenses and few older ones. In my research, I struggled to find any example of this kind of lens, although Nikon does still list it in their official acronym list. If you know of an RF lens, please leave a comment at the bottom! Capable of compensating for up to 3-stops of movement when shooting handheld or in tricky lighting conditions. VR is extremely useful in situations where a tripod would otherwise be required.
RD Lenses feature aperture blades designed to create a circular opening rather than the usual polygonal type. This alters the appearance of bokeh in an image, the lack of straight lines creating a soft-focus effect.
SIC lenses also show superior colour balance and reproduction. FL lenses feature elements manufactured from Fluorite, a monocrystal optical material. Fluorite is excellent at correcting chromatic aberration within the visible light spectrum and is also lighter than optical glass.
Fluorite-glass can however be brittle and temperature-sensitive. As part of the 1 Nikon camera lineup, Nikon released some full waterproof cameras that used the CX mount described at the beginning of the article in the mounts section. Along with these cameras came several fully waterproof lenses which carry the AW designation for All Weather. When mounted on a waterproof 1 Nikon camera, you can submerge the pair completely in water.
This technology uses a specially designed diffractive lens element to correct chromatic aberration, something which typical refractive lenses need several lens elements to do.
The diffractive element features a microscopically grooved rear element that forces light of different wavelengths to all converge on the same point see diagram above.
Knowledge Base. Contact Us. My Account. Welcome to Fotodiox, Inc. Login Create Account. Shopping Cart. These lenses have CPU contacts toward the top of the mount in addition to a meter coupling ridge. The aperture can be locked and controlled electronically, which enables shutter priority mode.
To lock a lens, the aperture will need to be set to the smallest aperture, which will be printed in orange. Backward compatibility to cameras without CPU contacts is maintained by the meter coupling ridge.
This is because of Nikon's decision to remove physical apertures from these and future Nikon lenses. At the time of the change, some photographers were upset because lenses would not be compatible with older cameras. Compatibility issues will exist with SLRs, reversing lenses, and adapting to non Z-mount camera bodies. There are many abbreviations that can appear on the barrel of a Nikon lens.
The ones most commonly seen on modern Nikon lenses are below. The Nikkor moniker is used on lenses that are made to Nikon's highest standard. That does not mean that the Nikon F-mount lenses lacking the Nikkor designation are bad. They are intended for use with DX camera bodies. The focal length of these lenses will be stated in what the equivalent focal length would be for a full frame lens.
Sensor size. FX bodies have an option to crop to fit a DX image circle. Some cameras have the option to automatically crop when a DX lens is attached. Cropping reduces the number of megapixels because the entire sensor is not used.
You can also choose not to crop a DX lens. Using a telephoto lens will likely result in a circular image. This is because the image circle projected by the lens is not large enough to cover the sensor. As an example, a D is a Without any cropping, files are x pixels.
Using the D with a DX lens in crop mode, files are x pixels. DX cameras will capture the image from the center of an FX lens.
0コメント