Sigma Sigma 50mm f/1.4 EX DG HSM Lens for Nikon Digital Review

So you're looking at the Sigma 50mm f/1.4 EX DG HSM for Nikon. This is a classic fast prime lens that's been around for a while, and it's built a solid reputation for being a budget-friendly way to get that f/1.4 aperture. It's a 50mm lens, which on a full-frame Nikon body gives you that natural 'nifty fifty' field of view that's great for portraits, street photography, and low-light situations. On a Nikon APS-C camera, it acts more like a 75mm lens, which is actually a really nice focal length for tighter portraits. The big question people usually have is: is this older Sigma lens still a good buy, especially when you can find it used for around $280? Let's break it down.

This lens is all about two things: autofocus and that wide aperture. The autofocus is surprisingly quick and quiet thanks to its ring-type ultrasonic motor, landing it in the 99th percentile for AF performance. That means it'll keep up with most portrait and casual shooting without a fuss. The f/1.4 aperture is its other party trick, sitting in the 88th percentile. That lets you shoot in dim light and get that nice, shallow depth of field to make your subject pop. Just know that wide open at f/1.4, the image sharpness can be a bit soft in the corners. Stopping down to around f/2 or f/2.8 sharpens things up nicely. The bokeh quality is decent, scoring in the 81st percentile, so out-of-focus backgrounds are generally smooth and pleasing.

At its original price, this lens had stiff competition. But on the used market around $280, it becomes a much more interesting proposition. You're getting a genuine f/1.4 aperture and pro-level autofocus for the price of many slower f/1.8 lenses. The main trade-off is the size, weight, and the fact that it's an older optical design. If your priority is pure speed and bokeh on a budget, it delivers. If you want a lighter, sharper, more modern lens, you'll need to spend more.

Let's talk alternatives. The obvious one is the Nikon 50mm f/1.8G. It's sharper, lighter, and often cheaper, but you lose that extra stop of light from f/1.4 to f/1.8. For APS-C shooters, the Viltrox 35mm f/1.7 for Fuji X mount is a sharp, tiny, and cheap alternative that gives a similar field of view. If you're on a Nikon Z mirrorless system, adapting this Sigma is an option, but you should really look at native lenses like the Nikon Z 40mm f/2 or the much sharper (and pricier) Nikon Z 50mm f/1.8 S. The Sigma wins on aperture speed for the money, but loses on portability and modern optical corrections.

So, should you buy the Sigma 50mm f/1.4? It's a specific tool for a specific need. If you shoot with a Nikon DSLR (FX or DX) and you absolutely need an f/1.4 aperture for low-light work or creamy bokeh, and you're on a tight budget, this used Sigma is a solid pick. The autofocus is fantastic. But, if you value a lightweight kit, ultimate sharpness wide open, or weather sealing, you'll probably be happier with a newer Nikon 50mm f/1.8G or saving up for a native Z-mount lens. It's not a do-everything travel lens (its 27/100 travel score proves that), but as a dedicated portrait or low-light lens, it still gets the job done.