Ad
related to: abbe values of lenses for canon photography for sale ebay auction sitesusa.canon.com has been visited by 10K+ users in the past month
Search results
Results from the WOW.Com Content Network
Abbe number. In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist ...
This is critical, e.g., in sports photography and wildlife photography. The shallow depth of field provided by a telephoto lens also allows the subject of the photography to stand out better against the background. [11] Infrared corrected special-low-dispersion glass also has benefits to CCTV cameras. The low chromatic aberration of SLD glass ...
An optical instrument is said to be diffraction-limited if it has reached this limit of resolution performance. Other factors may affect an optical system's performance, such as lens imperfections or aberrations, but these are caused by errors in the manufacture or calculation of a lens, whereas the diffraction limit is the maximum resolution ...
The Canon EF 14mm f/2.8L USM is an ultra wide angle prime lens. It is the widest prime lens in the Canon EF series. Because it is corrected for a rectilinear projection, the field of view is less than that of the Canon 15mm fisheye . The front element of the lens is so prominent that it does not allow use of filters on the front.
In optics, the Abbe sine condition is a condition that must be fulfilled by a lens or other optical system in order for it to produce sharp images of off-axis as well as on-axis objects. It was formulated by Ernst Abbe in the context of microscopes. [ 1] The Abbe sine condition says that. the sine of the object-space angle should be ...
The EF 200mm USM lens is an L-series prime telephoto lens made by Canon Inc. for the EOS line of cameras. Four 200 mm primes were made: f/ 1.8, two f/ 2.8, and the most recent f/ 2.0. The 200 mm f/ 1.8 USM lens, introduced in November 1988, is the fastest 200 mm ever produced. [1] It is a large off-white lens with rear drop-in filter tray.
The Canon EF 20 mm f / 2.8 USM lens is an ultra-wide-angle prime lens produced by Canon for the EF lens mount. It features an ultrasonic motor. On a camera with an APS-C sensor the focal length is equivalent to 32 mm, and it is classified as a wide-lens. It features a ring-type USM motor featuring full-time manual and a fixed front element.
The Canon EF 600mm is a super-telephoto lens made by Canon Inc. The lens has an EF mount to work with the EOS line of cameras. f / 4L USM lens was released in November 1988 (923,000 yen). [1] f / 4L IS USM lens was released in September 1999 (1,290,000 yen). [2] f / 4L IS II USM lens was announced in February 2011 (US$12,999 at release, now US ...
Ad
related to: abbe values of lenses for canon photography for sale ebay auction sitesusa.canon.com has been visited by 10K+ users in the past month