Steelsring Canon EF to Fujifilm GFX Autofocus Adapter Test
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guest post by Peter Sills – www.digitalfocus.net
Several months ago, I first read about adapters that would allow me to mount my Canon lenses to my new Fujifilm GFX 50S. Interested, I reached out to the various companies mentioned inquiring about their availability and acquiring one for potential testing. Of these, only one, Steelsring, got back to me. After some conversation, we agreed that I would test the unit and write an article as to my findings. Several months later, in December of 2017, I received my adapter.
I was intrigued. When first released, the Steelsring EF>GFX adapter was reported as being the only adapter of its kind which would also property report the Lens EXIF information to the camera and turn off the automatic lens correction (for the Fuji 63mm lens) in the process. Having this ability allows you to create your own special “Lens Profiles” for the camera/lens/adapter combination – something I find quite useful and important.
When the unit arrived, it came in a very attractive wood and aluminum case. It was extremely well packaged and after careful examination appeared to be well constructed as well.
Of course, how these adapters operate is that on one side of the adapter is the Native Mount (Fuji) side, and on the opposing side is the Lens Mount (Canon side). Most adapters are “passive” so there are no contact pins. The Steelsring adapter is of a new generation of mounts that allow a camera to actually obtain accurate focus using “non-native” lenses. In this case Canon lenses.
So, the next step was to mount this to my Fuji GFX and begin testing.
I found the fit to be quite tight and secure, both on the Fuji side and on the Canon side. I would say even more so on the Fuji side. Many of the Canon lenses I found “clicked” right in to place. A few required a little adjustment of the lens release button to ensure they were indeed “locked-in”. Once this was properly engaged, the connection was tight, with no looseness or “wobble” at all.
My objectives were quite simple.
- Determine if a lens adapter, in this case an auto-focus lens adapter, could provide usable AF accuracy and speed using my existing Canon lenses.
- Determine if the “vignetting” of these lenses would be significant enough to render them useless or usable for my testing.
Alright, so how to begin?
