Tamron SP 45mm f/1.8 Di VC USD 45mm

A portrait specialist with dreamy bokeh that's hamstrung by weak optics and useless stabilization. Get it for the look, not the specs.

The autofocus is a mixed bag. It's dead-center average, which means it's fine for posed portraits but you'll feel the hesitation if you're trying to track a kid running around a backyard. The real surprise, though, is the lack of stabilization. For a lens with "VC" right in the name, our data shows it's actually a weak spot, falling well behind most of the market. You'll want to keep your shutter speed up, especially in low light, which kind of defeats the purpose of that bright f/1.8 aperture.

The Sigma 18-50mm f/2.8 is the obvious elephant in the room. It's a zoom, so it's way more versatile, and Sigma's contemporary line has a much better reputation for build and optical quality. You'd lose a stop of light and some of that unique bokeh, but you'd gain a lens you can actually use for more than just headshots. The Nikon Z 17-28mm f/2.8 is another strong alternative if you're on the Z mount, offering wide-angle versatility that makes this Tamron look like a one-trick pony. For a pure portrait prime, this Tamron has a specific look, but the competition is just more practical.

At $595, this is a tough sell if you're just buying the lens. The optical performance is disappointing for a prime in this price range. But, you're getting a whole kit with filters, a monopod, and a case. If you need all that stuff, the value proposition shifts. If you don't, your money is better spent on a sharper piece of glass.

The Tamron SP 45mm f/1.8 is a weird, wonderful lens that refuses to fit neatly into any box. It's a prime that acts like a standard normal, but the 45mm focal length gives you just a touch more compression than a typical 50mm, which is fantastic for portraits. The real headline here is the image quality. The bokeh is creamy and the f/1.8 aperture is a standout, putting it in the top tier for subject isolation. Just don't expect it to be a do-it-all workhorse. This is a specialist's tool for making people look good, and it stumbles hard if you point it at a mountain range.

Landscape and street photographers should run the other way. This lens is optically weak for detailed scenic work and the focal length is awkward for capturing dynamic street scenes. If you need a sharp, versatile walk-around lens, grab the Sigma 18-50mm f/2.8 instead. You'll lose a stop of light but gain a tool that's actually useful for more than one thing.

Buy this lens for one reason and one reason only: you want that specific, beautiful bokeh for portraits and you're getting a great deal on the bundle. For everyone else, this is a pass. The weak optical score, poor stabilization, and limited use case make it a specialty item that most photographers will find frustrating. It's a character lens, not a workhorse, and you have to really love that character to live with its flaws.