This MedLibrary.org supplementary page on Canon EF 50mm f/2.5 Compact Macro lens is provided directly from the open source Wikipedia as a service to our readers. Please see the note below on authorship of this content, as well as the Wikipedia usage guidelines. To search for other content from our encyclopedia supplement, please use the form below:
Related Sponsors
The EF 50mm lenses are a group of normal prime lenses made by Canon that share the same focal length.
These lenses have an EF type mount, that fits the Canon EOS line of cameras.
When used on a digital EOS body with a field of view compensation factor of 1.6x, such as the Canon EOS 400D, it provides a narrower field of view, equivalent to an 80mm lens mounted on a 35mm frame body. With a 1.3x body such as the Canon EOS-1D Mark III It provides a less narrow field of view, equivalent to an 65mm lens mounted on a 35mm frame body.
Six EF 50mm lenses have been developed and sold. Two of are L series lenses and three have Ultrasonic motors.
Since the f/1.2L, f/1.4 and f/1.8 lenses can provide very similar wide-aperture shots but have very different price tags, they have naturally been the subject of many in depth comparisons.
- f/1.0L USM1 (discontinued, replaced by f/1.2L)
- f/1.2L USM2
- f/1.4 USM3
- f/1.84 (discontinued, replaced by f/1.8 II)
- f/1.8 II5
- f/2.5 Compact Macro6
Contents |
EF 50mm f/1.0L USM
The discontinued EF 50mm f/1.0L USM is a professional L series autofocus lens. It sells for as much as double the original retail value.citation needed It is the fastest lens that Canon made for the EF mount, making this a collector's piece.citation needed This lens has a metal body and mount, and plastic extremities. It also features a wide rubber focus ring that is damped, a distance window with infrared index, and the ability to set the focus range from 0.6m to infinity, or 1m to infinity. The 8-blades and maximum aperture of f/1.0 gives this lens the ability to create extremely shallow depth of field effects and to support low light situations. The optical construction of this lens contains 11 lens elements, including two ground and polished aspherical lens elements. This lens uses a floating front extension focusing system, powered by a ring-type USM motor. The front of the lens does not rotate, but does extend when focusing.
EF 50mm f/1.2L USM
The EF 50mm f/1.2L USM is a professional L series lens, it was designed to replace the EF 50mm f/1.0L USM. It is the shorter of the only two f/1.2 lenses Canon makes, the other being the EF 85mm f//1.2L USM. It is constructed with a metal body and mount, and plastic extremities. This lens features a wide rubber focusing ring that is damped, a distance window with infrared index, and is weather-sealed. A circular, 8-blade, maximum aperture of f/1.2 gives this lens the ability to create very shallow depth of field effects. The optical construction of this lens contains 8 lens elements, including one ground and polished aspherical lens element. This lens uses a floating front extension focusing system, powered by a ring-type USM motor. The front of the lens does not rotate, but does extend when focusing.
EF 50mm f/1.4 USM
The EF 50mm f/1.4 USM is a consumer-level lens. It is constructed with a plastic body and a metal mount. This lens features a distance window with infrared index. An 8-blade, maximum aperture of f/1.4 gives this lens the ability to create shallow depth of field effects. The optical construction of this lens contains 7 lens elements, without any special lens elements. This lens uses a front extension focusing system, powered by a micro USM motor. Even though this lens uses a micro USM motor, it still has FTM (full-time manual focus) available. Auto focus speed of this lens is fast, but not as quick as most ring-USM-based lenses. The front of the lens does not rotate, but does extend when focusing.
EF 50mm f/1.8
The EF 50mm f/1.8 is an economy level lens (discontinued in 1990), which has been replaced by the EF 50mm f/1.8 II. It is constructed with a plastic body and a metal mount, and features a distance window with infrared index. A 5 blade maximum aperture of f/1.8 gives this lens the ability to create depth of field effects.
The optical construction of this lens contains 6 lens elements, with no special elements. This lens uses a front extension focusing system, powered by an AFD motor, Front of the lens does not rotate when focusing, making it compatible with circular polarisers.
Auto focus speed, despite the AFD motor, is moderately fast although audible.
EF 50mm f/1.8 II
The EF 50mm f/1.8 II replaced the EF 50mm f/1.8 in 1991. Because of its low price but relatively high optical quality, this lens has excellent value. It is constructed with a plastic body and mount and has a very simple design with no features.
Changes compared to the mk I model are the plastic mount, the absence of a distance window and a micro motor instead of an arc-form drive. Optically, this lens is almost identical to the first version.
The focus ring on this lens is even smaller than the one on the mk I model and placed on the front of the outer barrel. Also unlike the earlier model, it isn't decoupled in AF-mode, so accidentally turning it can cause damage to the autofocus mechanism.citation needed
EF 50mm f/2.5 Compact Macro
The EF 50mm f/2.5 Compact Macro is a consumer-level macro lens. It is constructed with a plastic body and metal mount. This lens features a distance window with infrared index, and magnification markings on the extending lens barrel. A 6-blade, maximum aperture of f/2.5 means this lens is not suited for depth of field effects, except at short focus distances. The optical construction of this lens contains 9 lens elements, without any special lens elements. This lens uses a front extension focusing system, powered by a micro motor. Auto focus speed of this lens is moderate, and does make sound. The front of the lens does not rotate when focusing, but it does extend considerably.
The EF 50mm f/2.5 Compact Macro can produce maximum magnification of 1:2, not the 1:1 of other Canon macro lenses. The optional Life-Size Converter EF7 will allow this lens to produce a maximum magnification of 1:1. Attaching the converter costs the lens aperture size to f/3.5, as well as a reduced focus range. This converter is propriety to the EF 50mm f/2.5 Compact Macro, and cannot be used with any other EF lens.
Specifications of the EF 50mm lenses
| Attribute | f/1.0L USM | f/1.2L USM | f/1.4 USM | f/1.8 | f/1.8 II | f/2.5 Compact Macro |
|---|---|---|---|---|---|---|
| Image |  |
 |
 |
 |
 |
 |
| Key features | ||||||
| Full-frame compatible |  Yes |
|||||
| Image stabilizer |  No |
|||||
| Ultrasonic Motor | Yes |
No |
||||
| L-series | Yes |
No |
||||
| Diffractive Optics | No |
|||||
| Macro | No |
Yes (1:2) |
||||
| Technical data | ||||||
| Aperture (max-min) | f/1.0-f/16 | f/1.2-f/16 | f/1.4-f/22 | f/1.8-f/22 | f/1.8-f/22 | f/2.5-f/32 |
| Construction | 9 groups / 11 elements | 6 groups / 8 elements | 6 groups / 7 elements | 5 groups / 6 elements | 8 groups / 9 elements | |
| # of diaphragm blades | 8 | 5 | 6 | |||
| Closest focusing distance | 2ft / 0.6m | 1.5ft / 0.45m | 0.7ft / 0.2m | |||
| Max. magnification | 0.15x (1:6.6) | 0.50x (1:2) | ||||
| Horizontal viewing angle | 40° | |||||
| Diagonal viewing angle | 46° | |||||
| Vertical viewing angle | 27° | |||||
| Physical data | ||||||
| Weight | 2.2lb / 985g | 1.2lb / 545g | 0.6lb / 290g | 0.4lb / 190g | 0.3lb / 130g | 0.6lb / 280g |
| Maximum diameter | 3.6in / 91.5mm | 3.6in / 85.4mm | 2.9in / 73.8mm | 2.6in / 67.4mm | 2.6in / 68.2mm | 2.7in / 67.6mm |
| Length | 3.2in / 81.5mm | 2.6in / 65.5mm | 2.0in / 50.5mm | 1.7in / 42.5mm | 1.6in / 41mm | 2.5in / 63mm |
| Filter diameter | 72mm | 58mm | 52mm | |||
| Accessories | ||||||
| Lens hood | ES-79II | ES-78 | ES-71II | ES-65 | ES-62AD | n/a |
| Case | LP1216 | LP1214 | LP1014 | LP814 | ||
| Retail information | ||||||
| Release date | September 1989 | August 2006 | June 1993 | March 1987 | December 1990 | December 1987 |
| Currently in production? | No |
Yes |
No |
Yes |
||
| MSRP $ | $4210 | $1599 | $520 | $130 | ||
| Street Price $ | $2500 | $1599 | $315 | $80 | $230 | |
Reviews
50mm f/1.0L USM
50mm f/1.2L USM
50mm f/1.4 USM
50mm f/1.8 II
- Aper(cul)ture
- photodo (MTF)
- photozone.de
- SLRgear.com
- The-Digital-Picture (includes comparison of 50mm lenses)
- photo.net
50mm f/2.5 Compact Macro
Life-Size Converter for 50mm f/2.5 Compact Macro
Comparisons
References
- ^ Canon Inc.. "EF 50mm f/1.0L USM". Canon Camera Museum. Retrieved on 2007-08-06.
- ^ Canon Inc.. "EF 50mm f/1.2L USM". Canon Camera Museum. Retrieved on 2007-08-06.
- ^ Canon Inc.. "EF 50mm f/1.4 USM". Canon Camera Museum. Retrieved on 2007-08-06.
- ^ Canon Inc.. "EF 50mm f/1.8". Canon Camera Museum. Retrieved on 2007-08-06.
- ^ Canon Inc.. "EF 50mm f/1.8 II". Canon Camera Museum. Retrieved on 2007-08-06.
- ^ Canon Inc.. "EF 50mm f/2.5 Compact Macro". Canon Camera Museum. Retrieved on 2007-08-06.
- ^ Canon Inc.. "Life-Size Converter EF". Canon USA. Retrieved on 2007-10-15.
|
|||||||||||||||||||||||||||||||||||||||||
Wikipedia content modification information:
- This page was last modified on 8 January 2009, at 09:37.
Wikipedia Authorship and Review
Wikipedia content provided here is not reviewed directly by MedLibrary.org. Wikipedia content is authored by an open community of volunteers and is not produced by or in any way affiliated with MedLibrary.org.
Wikipedia Usage Guidelines
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article on "Canon EF 50mm f/2.5 Compact Macro lens".
The URL for this specific entry is:
All Wikipedia text is available under the terms of the GNU Free Documentation License. (See Copyrights for details). Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc.