Nikon Z 40mm f/2 SE Review: The Perfect Everyday Lens for the Zf?

I don’t see much point in using the Nikon Z 40mm f/2 SE on anything other than the Nikon Zf.

It isn’t Nikon’s sharpest lens. Autofocus is slower than the S-line primes, and wide open performance is average at best. If you’re chasing ultimate image quality, there are better options in the Z system.

But that’s not what this lens is about.

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Why This Lens Makes Sense on the Zf

At Christmas, despite having a Nikon Z8, a Z6III and several other cameras available, I chose to shoot the entire day with the Nikon Zf and the 40mm f/2 SE.

I wanted excellent image quality in poor indoor light. I needed something that could keep up with the kids opening presents and playing. But I didn’t want a large, heavy setup that felt intrusive or intimidating.

This is exactly the kind of situation where the 40mm f/2 SE makes sense.

It balances perfectly on the Zf. It’s small, light and easy to carry all day. It doesn’t get much of a reaction from the kids. And for general family photography, it delivers files that are more than good enough.

Image Quality: Is It Good Enough?

I own several 1.8 S-line primes, including the incredible 50mm f/1.8 S. So trusting our last family Christmas in the Philippines to the 40mm f/2 SE did feel like a small risk.

The 40mm f/2 is not in the same league as the S-line primes in terms of sharpness, autofocus speed or build quality. That’s obvious the moment you compare files side by side.

But for this kind of photography, it doesn’t really need to be.

The real question was simple: could it handle the day and give me decent photos?

Wide open at f/2, it isn’t clinically sharp. It’s noticeably softer than my 35mm or 50mm f/1.8 S lenses. Eyelashes aren’t defined to within an inch of their life. Fine detail doesn’t have the same bite.

But there’s a difference between clinically sharp and acceptably sharp.

The 40mm f/2 is acceptably sharp. It won’t impress you in the way the S-line primes do, but it’s sharp enough that it doesn’t detract from the images when viewed at normal size. If you zoom in and pixel peep, yes — it’s a little underwhelming. Viewed as photographs rather than test charts, it’s perfectly acceptable.

With a lens like the 40mm f/2 SE, I’m not expecting the sharpest photos available. I want images that are acceptably sharp and a rendering that doesn’t distract from the moment.

The bokeh is gentle and soft, which suits photos of people. It isn’t nervous or busy, and it doesn’t pull your eye away from the subject. For a lens like this, used in this way, that matters just as much as technical sharpness. Stopped down to f/2.8-5.6 the lens sharpens up noticeably.

There can be a little green fringing on high-contrast edges, particularly with strongly backlit subjects. It’s there if you look for it. But in normal family photography, it rarely becomes an issue, and it certainly didn’t ruin any of the images I cared about.

Autofocus and Build Quality

Autofocus on the 40mm f/2 SE is perfectly usable, but it isn’t on the same level as Nikon’s 1.8 S-line primes.

It’s a little slower and less decisive, and you don’t get quite the same snap into focus that you do with lenses like the 35mm or 85mm f/1.8 S. I did have a few occasions where focus missed by a fraction, particularly in lower indoor light.

That said, it was still competent overall. It kept up with the kids opening presents and moving around without stopping to pose. For this kind of family photography, it was more than capable of doing the job.

Build quality follows a similar pattern. It’s solid enough, but it doesn’t have the dense, premium feel of the S-line lenses. There’s more plastic in the construction, and it feels built to a price.

On the Zf, though, the size and weight are part of the appeal. It keeps the camera balanced, compact and easy to carry all day.

I do wish Nikon had included a proper aperture ring. For a lens styled specifically to match the Zf, that feels like a missed opportunity. It would have elevated the shooting experience and made the pairing feel even more intentional.

As it stands, the 40mm f/2 SE isn’t built to impress — it’s built to be light, simple and affordable. And within those expectations, it performs well enough.

Weather Sealing

Nikon claims the 40mm f/2 SE is weather sealed. On my copy, I can’t see a rubber gasket around the lens mount, and the mount itself — like much of the lens — is made from plastic.

That might be a cause for concern for some people. In practice, the lightweight plastic construction has the added benefit of not attracting or holding water in the same way metal can.

I’ve used the 40mm f/2 SE in light drizzle without any issues. If I get it out in proper Scottish rain, I’ll update this section accordingly, but based on how it feels and how I’ve used it so far, I’d expect it to be just fine for normal outdoor use.

Who Is It For?

In my opinion, the Nikon Z 40mm f/2 SE is a lens you buy with the Zf — or one you add later if you want a lightweight everyday lens that matches the body almost perfectly.

Anyone expecting S-line performance should avoid it. It simply isn’t at that level in terms of sharpness, autofocus speed or build quality.

But that’s not what it’s trying to be.

For a quietly competent lens that allows you to bring your camera with you when photography isn’t the main focus of your day, the 40mm works really well. It really comes down to what type of photographer you are and what you intend to do with it.

If your photography is more casual — family moments, days out, everyday life — and balance, size and weight matter because they determine whether you actually carry your camera, then this is a worthwhile lens at a very reasonable price for the Zf.

Would I buy it again?

Yes, in the same kit form I bought it with the Nikon Zf. It makes the Zf a genuinely easy-to-carry, compact package while still delivering beautiful full-frame files with reliable autofocus.

Nikon absolutely should have included an aperture ring. That would have elevated the experience and made the pairing feel even better, especially given the retro styling of both the lens and the Zf.

As it stands, though, the 40mm f/2 SE fills a clear role — and on the Zf, it makes a lot of sense.

Nikon Z 40mm f/2 SE FAQ