Canon EF 28-105mm lens

From Wikipedia, the free encyclopedia

The Canon EF 28-105 mm f/4-5.6 is an inexpensive zoom lens often included as a kit lens with Canon 35 mm single-lens reflex cameras. 28-105 mm is a standard wide to telephoto zoom range. The Canon EF 28-105 mm f/3.5-4.5 USM is a higher quality zoom lens with a better build quality.

[edit] EF 28-105mm f/3.5-4.5 USM

This lens is a well-regarded consumer-grade lens. Its focus motor is ring USM, resulting in quick and quiet autofocus operation; this motor also allows the lens to offer full-time manual focusing.

There are three versions of this lens. The original lens has a five-blade diaphragm. Partway through its production run, this was replaced with a seven-blade diaphragm; however, contrary to normal Canon practice, the name of the lens was not changed. The third version, the EF 28-105mm f/3.5-4.5 USM II, is a cosmetic change. Apart from the diaphragm, all three versions have identical optics and mechanics.

[edit] EF 28-105mm f/4-5.6 USM

This is an inexpensive version of the 28-105mm, cosmetically similar to the 18-55mm or the 90-300mm lenses which have the characteristic rubber grip on the barrel. While retailing for around $100 less, this make has a decreased f-stop range, cheaper build quality, and uses a micro-USM instead of ring USM.

[edit] Specifications

Attribute	4.0-5.6	3.5-4.5
Image stabilizer	No
Ultrasonic Motor	Yes
L-series	No
Diffractive Optics	No
Macro	No
Maximum aperture	f/4.0-5.6	f/3.5-4.5
Minimum aperture	f/22
Weight	210g	372g
Diameter	2.6"	2.8"
Length
Filter diameter	58 mm
Horizontal viewing angle
Diagonal viewing angle
Groups/elements	9/10	12/15
# of diaphragm blades	6	7
Closest focusing distance	1.57'	1.6'
MSRP $	$140	$230