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Macro photograph of a common yellow dung fly ( Scathophaga stercoraria) made using a lens at its maximum 1:1 reproduction ratio, and an 18×24mm image sensor, the on-screen display of the photograph results in a greater than life-size image. Headshot of a dragonfly taken with a 100 mm macro lens coupled with a 50 mm lens in reverse at the end.
The lens has an EF mount and works with EOS film and digital cameras. The lens comes in two different versions: Canon EF 70–210mm f/4 AFD (1987–1990) Canon EF 70–210mm f/3.5–4.5 USM (introduced 1990) The variable-aperture USM model utilizes a rotating ring instead of a push-pull system for adjusting zoom. The lens was superseded by the ...
The Canon EF 28–70mm f/2.8L USM is an EF mount wide -to- normal zoom lens made by Canon from 1993 to 2002. It was replaced by the 24–70mm f/ 2.8L USM . Among standard zoom lenses, it is known for very good contrast and sharpness and for its extremely low chromatic aberration and barrel distortion. [1] It has a metal body and neutral color ...
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]
Canon EF 28-80mm f/3.5-5.6 USM. The EF 28–80mm f/3.5–5.6 is a zoom lens produced by Canon Inc. for their series of EOS single-lens reflex cameras. Canon produced eight iterations of the lens from 1989 to 1999. The other 28–80mm lens is the EF 28–80mm f/2.8–4L USM, which was an EF mount wide -to- normal zoom lens introduced by Canon in ...
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 ...
Canon EF 35–80mm lens. The EF 35-80mm f/4-5.6 USM lens is a family of EF mount wide -to- normal zoom lenses manufactured and sold by Canon. There were five versions made. One contained a piezoelectric motor, three contained a micro motor, and one contained a USM motor.
Tilt-lens photo of a model train. Note how the focus plane is along the train, and how the blurring of the background proceeds from left to right. Tilt–shift photography is the use of camera movements that change the orientation or position of the lens with respect to the film or image sensor on cameras .
The EF 100–300mm refers to three telephoto zoom lenses produced by Canon. They are of the EF lens mount that is compatible with the EOS line of cameras. The three versions are: f/ 5.6. f/ 5.6L. f/ 4.5–5.6 USM. The two 5.6 versions were contemporaries, launched at the beginning of the Canon EOS system. The L version had a different optical ...
The EF 24–105mm f/4L IS USM is an EF mount wide -to- telephoto zoom lens. It was introduced by Canon in 2005 to complement the well-regarded 17–40mm f/4L USM and 70–200mm f/4L USM . The EF 24–105mm f/4L IS USM lens is often compared to the other L series zoom of comparable range, the 24–70mm f/2.8L USM, losing one full stop but ...