Sigma 50mm f/2.8 EX DG Macro Lens For Nikon

 
Specs:
Sigma 50mm F2.8 EX DG Macro
Principal specifications
Lens type
Prime lens
Max Format size
35mm FF
Focal length
50 mm
Image stabilisation
No
Lens mount
Canon EF, Pentax KAF, Sony Alpha, Sigma SA, Nikon F (FX)
Aperture
Maximum aperture
F2.8  
Minimum aperture
F32.0
Aperture ring
No
Number of diaphragm blades
7
Aperture notes 
Minimum aperture on Canon, Sigma, and Sony Alpha versions is F45
Optics
Elements
10
Groups
9
Focus
Minimum focus
0.19 m (7.44″)
Maximum magnification
1×
Autofocus
Yes
Motor type
Micromotor 
Full time manual
No
Focus method
Extending front
Focus notes
Floating focus mechanism. Screw drive on Nikon, Pentax and Alpha mount versions.
Distance scale
Yes
DoF scale
Yes
Focus distance limiter
Yes
Physical
Weight
320 g (0.71 lb)
Diameter
71 mm (2.81″) 
Length
67 mm (2.62″)
Materials
metal mount
Colour
Black
Filter thread
55 mm
Filter notes
Does not rotate on focus
Hood supplied
Yes
Tripod collar
No