Review of the Steelsring Nikon F to Fujifilm GFX Smart Autofocus Adapter

After a long wait, the Steelsring Nikon F to Fujifilm GFX Smart Autofocus Adapter started to be available towards the end of 2019.

You can find it here on AmazonUS.

No Dylan published his review, which you can see below. Here are the main points:

  • it’s not the cheapest adapter
  • allows you to autofocus with the more modern Nikon G and E type lenses
  • good build quality
  • mounting on GFX mount does not sound quite as smooth as mounting a GFX lens on the body or a Laowa lens. On the other side, the Nikon mount part feels good
  • ability to control aperture
  • you have an aperture ring on the adapter for G type lenses, and you can set it to AUTO for E type lenses
  • E type lenses with magnetic aperture can be controlled electronically via the GFX body
  • G type lenses are not really fully supported. Aperture control is purely mechanical and the adapter doesn’t actually know which position it is in. Aperture value is not send to the camera. The lens can only communicate to the body what its widest aperture is, but if you stop down, it is unable to tell you who much it stopped down
  • loose aperture ring
  • aperture stops are very close together, hence not easy to be accurate
  • autofocus speed depends a lot on the lens.
  • you will see wobbeling of the contast AF detect system
  • GFX100 phase detection system is not supported
  • You won’t get Nikon level focus speed, because the GFX system is not capable of that
  • if you accept an autofocus speed a bit slower than native GFX lenses, then it can work for you
  • there is more or less strong vignetting depending on the lens
  • wide open, sharpness is not quite as high as on Nikon cameras, as the Nikon lenses where not designed to resolve over such a large sensor. If you stop down, things get much better
  • for more sharpness better use GFX lenses

This is the summary of the video below. But Dylan posted an article about it also on fstoppers, that you can read here.

  • Steelsring NK-F/GFX smart autofocus adapter: AmazonUS / eBay

Fujifilm GFX 100: B&H Photo, AmazonUS, Adorama, Focuscamera

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Steelsring Nikon to Fujifilm GFX Autofocus Smart Adapter Firmware 1.03 Released

Steelsring has released firmware 1.03 for their Nikon to Fujifilm GFX smart autofocus adapter.

  1. Bug fixes, improve Tamron and Sigma F-mount lens compatiability
  2. Improve AF lock accuracy

For Mac OS 10.7.5+ users only:

You have to disable Gatekeepr before start firmware updater, and remeber to enable it again when it’s done.
To disable it: sudo spctl –master-disable
To enable it: sudo spctl –master-enable
Please refer to http://osxdaily.com/2015/05/04/disable-gatekeeper-command-line-mac-osx/ for more d
etails

Here are the firmware download links for Windows and for Mac.

  • Steelsring NK-F/GFX smart autofocus adapter: AmazonUS / eBay

Fujifilm GFX 100: B&H Photo, AmazonUS, Adorama, Focuscamera

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Steelsring Nikon F to Fujifilm GFX Smart Autofocus Adapter Available

Steelsring NK-F to GFX Smart Adapter

Before we share the news about the Steelsring N/GFX autofocus smart adapter, it’s important to recap:

  • May 2018: Development announcement of Steelsring Nikon to GFX autofocus adapter
  • September 2018: Beta testing delayed
  • March 2019: Steelsring updates its website and says the adapter is coming soon

Since then, no more news.

However, all of a sudden, the Steelsring NK-F/GFX smart autofocus adapter now appeared for sale at AmazonUS here and at eBay here.

At the moment of this article ebay has 2 available and AmazonUS is selling via this retailer.

Also, on ebay the adapter shows the “Steelsring” brand printed on it, but it is sold as a Peipro NIK-F for Fujifilm GFX smart adapter.

And last but not least, on the official Steelsring website here, there is not mention of this adapter being finally available, and the last firmware is still marked as for beta testers only.

Fuji GFX group member Paul bought it, and here is what he wrote in this post:

I contacted the seller of this item as its been 2 full business days since my order. They have responded within minutes and told me that the developer wanted to make some final changes to the product so that it’s ‘perfect’ before shipping but that it should ship this week. So I said, fine, I’ll wait. Yours sincerely

With all that said, here is what the official specs listed on AmazonUS say:

  • NK-F GFX Adapter Ring auto focus,auto iris (G head).
  • Special D head diaphragm adjustment.
  • NK-F GFX Adapter Ring sure synchronize exif information and support firmware USB upgrade.
  • Chrome plating on pure copper,wear-resistant and non discolored.
  • The original standard size shall be strictly implemented,and there shall be no gap,looseness and jitter when the joint is in place.

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