Best Pick

Sigma EX DC HSM 4.5mm f/2.8 5mm

53.7 Street Score
4mmf/2.8Nikon F
Why we recommend this

The fast f/2.8 aperture and 180-degree circular projection on APS-C sensors make this a specialized tool for low-light scenarios like astrophotography. Its equisolid angle projection method provides quantifiable data for scientific use, while the HSM motor enables quiet autofocus with full-time manual override. This lens is best for aurora photographers and researchers needing precise solid angle measurements of sky or vegetation distribution.

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Great Alternatives

These options also score highly and may better suit your specific needs

Sigma Art 50mm f/1.4 DG HSM 50mm

52.8 Street Score
50mmf/16Nikon FWeather Sealed
Why we recommend this

The 14-element optical design with three ED and one aspherical element delivers exceptional sharpness and suppresses aberrations even at its bright f/1.4 maximum aperture. Its robust, weather-sealed metal build and smooth, ring-type HSM autofocus system offer a premium handling experience that belies its price point. This lens is best for portrait and studio photographers using Nikon F-mount DSLRs who demand critical image quality and shallow depth of field control without the cost of first-party optics.

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Sigma Art 50mm f/1.4 DG HSM 50mm lens
Price CA$1,248