Samyang 45mm f/1.8 AF Ultra

A tiny, sharp 45mm that embarrasses lenses costing three times as much. Buy it, update the firmware, and go shoot.

Sharpness is the headline here, and it's legitimately surprising. Owners keep saying this thing holds its own against glass costing three times as much, and our optical data backs up the enthusiasm. The 7 elements in 6 groups with 2 aspherical elements do real work. Autofocus sits right around average for the category, which is fine for street work but won't blow anyone away for fast action. The f/1.8 aperture gives you solid low-light chops, though the bokeh quality lands in the bottom quarter of lenses we've tracked. Vignetting is noticeable wide open, but it's the kind of thing that clears up with one click in post.

The obvious comparison is the Sony FE 50mm f/1.8, and the Samyang wins on size and character while trading blows on autofocus. The Viltrox AF 35mm f/1.7 is another budget prime worth a look if you want something wider, but it's APS-C only and doesn't give you the full-frame flexibility. If you're cross-shopping the Sigma 18-50mm f/2.8 or Tamron 17-70mm f/2.8 zooms, you're making a different trade entirely: those give you versatility, this gives you a faster aperture and a much smaller footprint. For a dedicated walkaround prime, the Samyang is the more interesting buy.

At USD 269 to USD 299 across US listings, this lens is a steal. Amazon has it at the low end of that spread, and at that price you're getting sharpness that owners compare to lenses three times the cost. The EUR 336 to EUR 347 range in Europe is less exciting but still reasonable. For a full-frame autofocus prime that weighs less than a can of soda, this is one of the easiest value calls in the Sony E ecosystem.

The Samyang 45mm f/1.8 is the little prime that punches way above its price tag. It's tiny, sharp, and gives Sony E-mount shooters a genuinely useful walkaround focal length that splits the difference between a classic 50mm and a 35mm. The one thing to know: this is a budget lens that doesn't feel budget where it counts.

If you need weather sealing or shoot in rough conditions, this isn't your lens. Go grab something like the Sony FE 50mm f/1.8 if you want first-party reliability, or step up to a sealed prime if rain is part of your workflow. Also skip it if creamy bokeh is your whole personality, the 9-blade diaphragm is fine but the rendering won't make anyone swoon.

Buy it. The Samyang 45mm f/1.8 is the rare budget lens that doesn't make you apologize for anything that actually matters. Sharpness, color, and portability are all genuinely good, and the flaws are the kind you fix in post or forget about after a week. If you shoot Sony E-mount and want a small prime that lives on your camera, this is the one.