Lens comparison
Sigma 56mm F1.4 DC DN vs Sony E 50mm F1.8 OSS
Side by side on the Sony a6400: the view each gives, the weight with the camera and their sizes to one scale. No winner: the numbers that differ are the choice.
Side views to one scale from the makers' published sizes, mount on the left.
| Lens | Sigma 56mm F1.4 DC DN Contemporary | Sony E 50mm F1.8 OSS |
|---|---|---|
| Focal length | 56 mm | 50 mm |
| View on the a6400 | 84 mm equiv. | 75 mm equiv. |
| Maximum aperture | f/1.4 | f/1.8 |
| Stabilised | No | Yes |
| Made forSame | APS-C | APS-C |
| Weight | 280 g | 202 g |
| With the a6400 | 683 g | 605 g |
| Length × diameter | 59.5 × 66.5 mm | 62 × 62 mm |
| Filter | 55 mm | 49 mm |
| Closest focus | 50 cm | 39 cm |
| Magnification | 0.14x | 0.16x |
| Weather sealing | Yes | No |
| Fit | Fits and works | Fits, with a maker condition |
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Questions
Which is lighter on the a6400?
Sony E 50mm F1.8 OSS: Sigma 56mm F1.4 DC DN 683 g against Sony E 50mm F1.8 OSS 605 g with the camera, battery and card.
Which one is sharper?
We do not test lenses, so we cannot say; read reviews from people who have used both. The table compares what the makers publish.
Facts checked 9 Oct 2026 against the makers' specification pages. How we check