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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 ...
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 allows the lens to always stay in focus, from visible light to infrared. [12]
In December 2014, Peter Lik reportedly sold a photograph titled Phantom to an anonymous bidder for $6.5 million, making it potentially the third highest price paid for a photograph. [33] [34] [35] Lik's claim has been greeted with much scepticism.
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 Canon EF 35-70mm f/3.5-4.5 is an EF mount wide -to- normal zoom lens. It is one of the first lenses in the Canon EF series. It has the same zoom system and 9 lenses in 8 groups layout as the Canon New FD 35-70mm f/3.5-4.5 [1] although it is unclear whether the actual optical design is identical. In October 1988, Canon announced the EF 35 ...
Ernst Abbe. Ernst Karl Abbe HonFRMS (23 January 1840 – 14 January 1905) was a German businessman, optical engineer, physicist, and social reformer. Together with Otto Schott and Carl Zeiss, he developed numerous optical instruments. He was also a co-owner of Carl Zeiss AG, a German manufacturer of scientific microscopes, astronomical ...
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.
Canon EOS 1300D. Canon EOS 1200D is an 18.1 megapixel digital single-lens reflex camera (DSLR) announced by Canon on 11 February 2014. [ 1] It is known as the EOS Kiss X70 in Japan, the EOS Rebel T5 in the Americas, and the EOS Hi in Korea. [ 2][ 3] The 1200D is an entry-level DSLR that introduces an 18 MP sensor from the 700D and 1080p HD ...
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