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TTArtisan AF 40mm f/2 vs Sigma 40mm f/1.4 DG HSM Art

Both are Leica L prime lenses for full frame. Here is what actually differs.

Pick the TTArtisan AF 40mm f/2 if

  • You shoot video: STM autofocus is smooth and quiet (the Sigma 40mm f/1.4 DG HSM Art uses HSM)

Pick the Sigma 40mm f/1.4 DG HSM Art if

  • You need 1 stop more light for low light or background blur (f/1.4 vs f/2)
  • You care about the shape of out-of-focus highlights: 9 aperture blades vs 7

Spec differences

11 differences
Specifications that differ between the TTArtisan AF 40mm f/2 and the Sigma 40mm f/1.4 DG HSM Art
TTArtisan AF 40mm f/2 Sigma 40mm f/1.4 DG HSM Art
Brand
TTArtisan
Sigma
Max aperture
f/2
f/1.4 1 stop faster
Weight
not listed
1295 g
Length
not listed
155 mm
Diameter
not listed
87.8 mm
Filter thread
52 mm
82 mm
Max magnification
not listed
0.15×
Aperture blades
7
9 more blades
Optical design
9 elements / 6 groups
16 elements / 12 groups
Autofocus motor
STM
HSM
Weather sealing
not listed
Yes
6 identical specs hidden: mount, type, format, focal length, min focus distance, image stabilization. Show all
Mount
Leica L both
Type
Prime both
Format
Full frame both
Focal length
40mm both
Min focus distance
0.4 m both
Image stabilization
No both

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