Canon EF 28-105mm f/4.0-5.6 USM

	Full frame sized image Lenses that create APS-C sized image are designed for digital only. They cannot be used on cameras that have image sensor larger than the APS-C format. These lenses are not suitable for film cameras either. Ultrasonic AF Lenses with ultrasonic focusing mechanism tend to be quiter and faster than traditionally focusing lenses. No stepping motor AF Lenses with stepping motor focusing mechanism are better for contrast based focusing, and are quiter and faster than traditionally focusing lenses. No Low Dispersion lens element is used Low Dispersion lens elements help to reduce chromatic aberration. Not stabilized Image stabilization helps to reduce blur caused by hand shake, especially at high focal length or in low light situations. Image stabilization can give 1 to 3 stop advantage over none stabilized lens, based on the reciprocal rule. Plastic mount Cheaper lenses are usually equipped with plastic mount, while more expensive, professional lenses have metal mount. In general, metal mounts are more durable, and a good thing to have when lenses are changed a lot. When a camera is used mainly with one lens, the material of the lens mount is not that important. Internal Focusing Internally focusing lenses don't change their size while setting focus. The front lens is fixed The fixed front lens is not rotating during zoom and/or focusing. This allows the photographer to use petal shaped lens hood. Fixed front lenses also make the use of polarization filters a lot easier. Not Sealed Weather sealed lenses are protected from dust and water. While they are not water proof, these lenses can be used in rain and other humid environments. Some sealings only provide protection against dust or water, not both. Sealing is only available when the lens is used on a similarly weather sealed camera body. No drop-in filter support Drop-in filters are used in those lenses where either the front lens is too large, or the field of view doesn't permit the use of traditional filters at the front of the lens. Usually bright tele and ultra-wide angle lenses support this filter type.
The EF 28-105mm f/4-5.6 USM uses an aspherical lens element to maintain a high image quality throughout the zoom range. All the lens elements are made from environmentally friendly lead-free glass. The small size of the lens is due, in part, to the use of a new type of AF drive actuator. The Micro USM II is a minute ultrasonic motor that retains a similar level of performance as previous Micro USMs, but has a total length - as well as weight - reduced by almost one half. The AF speed is the fastest in its class* when used with the EOS 300V but also faster all round performance is delivered when the lens is used with other EOS models. With inner focusing, the front lens does not rotate during focusing. Various accessories can therefore be attached to the front lens without being hindered by lens rotation or movement.

The EF 28-105mm f/4-5.6 USM uses an aspherical lens element to maintain a high image quality throughout the zoom range. All the lens elements are made from environmentally friendly lead-free glass. The small size of the lens is due, in part, to the use of a new type of AF drive actuator. The Micro USM II is a minute ultrasonic motor that retains a similar level of performance as previous Micro USMs, but has a total length - as well as weight - reduced by almost one half. The AF speed is the fastest in its class* when used with the EOS 300V but also faster all round performance is delivered when the lens is used with other EOS models. With inner focusing, the front lens does not rotate during focusing. Various accessories can therefore be attached to the front lens without being hindered by lens rotation or movement.

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Canon EF 28-105mm f/4.0-5.6 USM Specification

Canon EF 28-105mm f/4.0-5.6 USM Specification
Available mount(s)	Canon EF
Application(s)	Portrait, Landscape, Architecture
Category(s)	Standard zoom
Multiplier	1×
Stabilizer	no
Focal length	28 - 105 mm (3.8× zoom)
Lens construction	10 elements in 9 groups
Angle of view	35mm: N/A digital: 75-23.3°
Number of blades	6
Maximum aperture	wide: f/4 tele: f/5.6
Minimum aperture	wide: f/22 tele: f/32
Minimum focusing distance	48 cm
Magnification	0.19×
Filter size	58 mm
Size	∅ 67 × 68 mm
Weight	210 g
Notes	AF Actuator: Micro USM II Magnification: 0,19x at 105 mm
AF speed	N/A
AF sound
Internal focusing	yes
Internal zoom	N/A
Fix front lens	yes
Mount type	plastic
Weather sealed	no
Drop in filter	no
Ultrasonic AF	yes
Stepping motor AF	no
APS-C sized circle	no
Low dispersion lens element	no
Hard case	N/A
Soft case	LP814
Lens hood	EW-60B printable lens hood
Tripod adapter	N/A
Discontinued	yes

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Canon EF 28-105mm f/4.0-5.6 USM

Full frame sized image

Ultrasonic AF

No stepping motor AF

No Low Dispersion lens element is used

Not stabilized

Plastic mount

Internal Focusing

The front lens is fixed

Not Sealed

No drop-in filter support

Canon EF 28-105mm f/4.0-5.6 USM Specification

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