differences

Reasons to consider the Sony E-Mount 16mm f/2.8

Auto focus Yes vs No
Help
Much smaller diameter 23 mm vs 74 mm
Help
3.2x smaller lens at the end
Slightly lighter 70 g vs 332 g
Help
4.7x lighter
Slightly shorter 62 mm vs 71 mm
Help
More than 10% shorter
Sony E-Mount 16mm f/2.8 Learn more about
the Sony E-Mount 16mm f/2.8

Reasons to consider the Sigma 15mm f/2.8 EX DG Pentax K

Fisheye lens Yes vs No
Help
Fisheye lenses take extremely wide 'circular' looking images
Slightly more magnification 1:3.8 (0.3) vs 1:13.7 (0.1)
Help
Take macro shots with subjects more than 3.5x larger in your photo
Sigma 15mm f/2.8 EX DG Pentax K Learn more about
the Sigma 15mm f/2.8 EX DG Pentax K

similarities

Compared to digital camera lenses

Common Strengths Common Weaknesses
Prime lens Fixed focal length prime lenses Help
Typically very sharp
Max focal length Poor telephoto Help
E-Mount 16mm f/2.816 mm
15mm f/2.8 EX DG Pentax K15 mm

competitors

Sony E-Mount 16mm f/2.8 Competitors

Sigma 19mm f/2.8 DN

Sigma 19mm f/2.8 DN

Lens

$169 - $299

Length Slightly shorter
Diameter Significantly larger diameter
Panasonic Lumix G  14mm f/2.5

Panasonic Lumix G 14mm f/2.5

Low light lens

$389

Length Shorter
Aperture Slightly wider aperture
Diameter Significantly larger diameter
Sony 20mm f/2.8

Sony 20mm f/2.8

Wide angle lens

$298

Length Shorter
Diameter Significantly larger diameter

Sigma 15mm f/2.8 EX DG Pentax K Competitors

discussion Which do you think is better?

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