Viltrox AF 40mm f/2.5 Z Review

The Viltrox 40mm f/2.5 is a weird little lens, and I kind of love it. It's not the fastest, sharpest, or most versatile prime you can buy, but it nails one thing perfectly: being a tiny, affordable, and surprisingly well-built companion for your Nikon Z camera. The one thing to know? This is a 'character' lens for street and casual shooting, not a technical masterpiece.

Honestly, the autofocus surprised me, and not in a good way. It's fine for static subjects in decent light, but it's in the 48th percentile for a reason. It hunts a bit in low light, and the STM motor isn't the quietest. The optical performance is decent for the price, landing in the 58th percentile, but don't expect corner-to-corner clinical sharpness wide open. It's got a pleasant, slightly vintage look.

For $168, it's absolutely worth it if you want a tiny, fun lens to leave on your camera for daily carry. You're paying for the form factor and build, not cutting-edge optics or speed. It's a steal for that specific use case.

Your main decision is between this and the Viltrox 35mm f/1.7 Z. The 35mm gives you a wider, more standard field of view and a much brighter f/1.7 aperture for low light, but it's bigger. If you need speed, get the 35mm f/1.7. If you prioritize the smallest possible package and a unique focal length, this 40mm f/2.5 is your pick. The Meike 55mm f/1.8 is another option, offering more background blur, but it's a tighter portrait focal length.

Get the Viltrox 40mm f/2.5 if you want the smallest, most discreet full-frame AF lens for your Nikon Z and you're on a tight budget. It's a perfect 'walkaround' lens. But if you shoot in low light often, need faster autofocus, or want more subject separation, spend a bit more for the Viltrox 35mm f/1.7 or look at the Meike 55mm f/1.8.