Review: The K&F Nikon F to Fujifilm X Adapter

K&F ( offers adapters for several brands. In my case, I needed a Nikon F mount to Fujifilm X mount adapter. I spend some time on the internet and found some really cheapo adapters and some really expensive ones. The one that got my interest was the Metabones Fuji X adapter but I think it is a little to expensive.  After some more research I run into the K&F Fuji X adapter. For 20USD and 6 USD shipping you can’t go wrong, 🙂 

My legacy Sigma 28-80mm Minizoom (Nikon F Mount) with K&F Nikon F to Fuji X adapter
The K&F Concept Fujifilm X mount adapter.

I cleaned up the closets and found some old Sigma lenses with Nikon F mount. The lenses are in excellent condition and I was thinking if there was a way to use them on my Fujifilm X gear. And with so many adapters around that shouldn’t be a problem. 🙂  The lenses are Sigma 28-80mm F4-5.6,  70-210mm F4-5.6, 35-135mm F4-5.6 and 1 Nikkor 35-80mm F4-5.6. As you see really old lenses but in good shape. All lenses are AF/MF, have aperture rings and offer a focus scale. Quite handy 🙂

Legacy Sigma Zooms. Nikon F mount

When you use the adapter you LOOSE the AF. You also LOOSE Aperture control. That’s why it’s handy if your lenses have aperture control rings. If your lens doesn’t have aperture control rings you need to get a different adapter from K&F, the one WITH an aperture control ring.  

Now, all these lenses are Full Frame Lenses. The K&F Fuji X adapter doesn’t offer a multiplier so you will get a different field of view. For example: the 28-80mm will become a 42-120mm. 

Tested with:

Fujifilm X-M1

Sigma 28-80mm F3.5-5.6 Nikon F mount

Sigma 70-210mm F4-5.6 Nikon F mount

Nikkor 35-80mm F4-5.6 Nikon F mount

K&F  Fuji X adapter (Nikon F to Fuji X)

Rollei Travel Tripod

The Test Gear: Fuji X-M1, K&F Concept Adapter and some Nikon F mount lenses
The set up with the Nikkor 35-80mm

The adapter

The adapter very well built. For that money it exceeded my expectations. 🙂  The build is outstanding. Materials like aluminium and brass but still light weight and strong. It feels solid. 

The K&F adapter attached to the Fujifilm X-M1

What to do on your camera

When you start using this adapter you have to change some settings in the menu. 1 Press ‘Menu’ to access the menu. 2 Scroll down until you come to settings 3 and choose the option ‘shoot without lens’. 3 Activate this option and exit the menu. 

Camera settings
View from the camera. Camera is in A mode. You will see that the F value stays on 0. You have to change the F number with the Aperture ring on the lens.

In the image above you can see that the F number (camera is in A-mode) stays on 0. This stays this way as the camera gets no Aperture info. To change the Aperture, rotate the aperture ring on the lens. My lenses have a click ring and a scale. Meaning that each click is 1 aperture value higher or lower. 

Test Images

Shot with the Nikkor 35-80mm
Shot with the 70-210mm. See how narrow that field of view is ! I focussed on the 10.


Shot with the 28-80mm Travel zoom
Shot with the 28-80mm Travelzoom



This is an easy one ! Highly recommended. For that money, such quality and ease to use, the K&F Fuji X adapter is highly recommended. You just can’t go wrong with this one !

Extra Images

Aperture open
Aperture closed
View with the Nikkor 35-80mm
Great Combo
You need to use a tripod if you want to use a set up like this.


Author: Admin

Hi... I am Ryan Nigel Scheemaker and I am a travel and landscape photographer.