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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
TS-E 135 mm f / 4L MACRO; Maker: Canon: Technical data; Type: Tilt-shift lens: Focal length: 135 mm: Crop factor: 1.0: Aperture (max/min) f / 4 – f / 45: Close focus distance: 0.49 m (19 in) Max. magnification: 0.5×, 0.77× with Extension Tube EF 25 II: Diaphragm blades: 9: Construction: 11 elements in 7 groups: Features; Ultrasonic motor No ...
EF-S 60mm Macro USM; Maker: Canon: Technical data; Type: Prime: Focus drive: Ultrasonic motor: Focal length: 60mm: Crop factor: APS-C: Aperture (max/min) f / 2.8 – f / 32: Close focus distance: 0.20 m (7.9 in) Max. magnification: 1:1: Diaphragm blades: 7: Construction: 12 elements in 8 groups: Features; Short back focus Yes: Lens-based ...
Canon currently offers five lenses with tilt and shift functions: the TS-E 17 mm f / 4, the TS-E 24 mm f / 3.5L II, the TS-E 50mm f/2.8L MACRO, the TS-E 90 mm f / 2.8L MACRO, and the TS-E 135 mm f/4L MACRO. The lenses are supplied with the tilt and shift movements at right angles to each other; they can be modified so that the movements operate ...
Discontinuation. 2021 [2] Retail info. MSRP. $1200 USD. The Canon EF 180/3.5L Macro USM lens is the longest macro lens made by Canon in the EF mount, and is one of Canon's L series range of professional camera lenses. The lens is compatible with the Canon Extender EF teleconverters. Canon discontinued manufacture of the lens in 2021.
The SP AF 90mm f/2.8 Di 1:1 Macro lens is a macro lens produced by Tamron. It comes in the Canon EF-mount, Nikon F-mount, Pentax K-mount, and Sony A-mount. The lens was released in 1997. It received the European "Lens of the Year: 1997-1998" award. [1] It was mechanically and cosmetically upgraded in February 2000. [1]
The lens at 2x magnification, mounted on its tripod collar. The MP-E65mm f/2.8 1-5x Macro Photo is a photographic lens that was released in September 1999 and was discontinued in 2023. It was manufactured by Canon for use on the EOS photographic system. It is a manual focus lens for the EF mount and is specifically designed for macro ...
The Canon EF-M 28mm f/3.5 Macro IS STM the first wide angle Macro lens in the Canon lineup. It has an integrated ring light, which is useful for macro photography. It can be use as ring light or as left / right light. The macro light is hidden if the lens hood is in place. The minimum focus distance is 97 mm and 93 mm at the super macro mode (1 ...
Where appropriate, prismatic correction can be used, either temporarily or permanently, to relieve symptoms of double vision. In specific cases, and primarily in adult patients, botulinum toxin can be used either as a permanent therapeutic approach, or as a temporary measure to prevent contracture of muscles prior to surgery
The Sigma 18-50mm f/2.8 EX DC Macro is a wide to normal angle, zoom lens made by the Sigma Corporation . The lens is produced in Canon EF mount, Four Thirds System, Nikon F-mount, Pentax K mount, the SA mount, and the Sony/Minolta AF Mount varieties, all have the same optical formula. The lens is designed for digital crop DSLR with an APS-C ...