Spesification

Tamron 17-50mm f/2.8

Principal specifications

Lens type

Zoom lens 

Max Format size

APS-C / DX

Focal length

17–50 mm

Image stabilisation

No 

Lens mount

Canon EF, Pentax KAF, Sony Alpha, Nikon F (DX) 

Aperture

Maximum aperture

F2.8 

Minimum aperture

F32.0 

Aperture ring

No 

Number of diaphragm blades

7 

Aperture notes

circular aperture 

Optics

Elements

16

Groups

13 

Special elements / coatings

2 hybrid aspherical elements 1 LD (Low Dispersion) glass element 1 XR (Extra Refractive) element 

Focus

Minimum focus

0.27 m (10.63″) 

Maximum magnification

0.22 x

Autofocus

Yes 

Motor type

Micromotor 

Full time manual

Unknown 

Focus method

Internal 

Distance scale

Yes 

DoF scale

Yes

Physical

Weight

430 g (0.95 lb) 

Diameter

74 mm (2.91″) 

Length

82 mm (3.22″) 

Colour

Black 

Zoom method

Rotary (extending) 

Zoom lock

Yes 

Filter thread

67 mm

Hood supplied

Yes 

Hood product code

flower shaped hood

Tripod collar

No