Canon EF 28-105mm lens

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. Currently every version of this lens is discontinued. Some versions of the lens may include the word macro or a flower icon which indicates macro capability, however due to the 1:5.2 image magnification ratio it cannot be considered as a true macro lens.

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. The lens uses internal focusing so the inner lens barrel does not rotate when focusing. This lens uses a "duo cam" type zoom barrel, this allows a more compact design, but still does not rotate while zooming.

This duo cam type zoom barrel is illustrated with the following two pictures:

• 

  Lens at 28 mm

• 

  Lens at 105 mm

There are three versions of this lens. The original lens has a five-blade diaphragm. The second version, with the flower icon having been replaced with the word "Macro," has a seven-blade aperture but no change to the name of the lens. The third version is named 28-105 3.5-4.5 II, and it has 7 blade diaphragm along with some minor physical changes.

EF 28-105mm f/4-5.6 USM

These are two inexpensive versions of the 28-105mm, cosmetically similar to the EF-S 18-55mm or the 90-300mm lenses which have the characteristic rubber grip on the barrel. While retailing for around $100 less, these lenses have a decreased f-stop range and cheaper build quality (with a chrome-plated ring). The first 4-5.6 version has a DC motor for autofocus, while the second version uses a micro-USM, instead of ring USM that the 3.5-4.5 models use.

Specifications

Attribute	f/4.0-5.6	f/3.5-4.5
Image
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/22-32	f/22-27
Max. magnification	1:5.2
Weight	0.46 lbs. / 210 g	0.83 lbs. / 372 g
Diameter	2.6" / 6.7 cm	2.8" / 7.2 cm
Length	2.7" / 6.8 cm	3" / 7.5 cm
Filter diameter	58 mm
Horizontal viewing angle	65° - 19° 20'
Diagonal viewing angle	75° - 23° 30'
Groups/elements	9/10	12/15
# of diaphragm blades	6	5 or 7
Closest focusing distance	1.57'	1.6'
MSRP $	$140	$230