AF adapters are less than perfect so it is no surprise that the initial availability of the SteelsRing GFX Nikon AF on Amazon has had a mixed reception due to limited lens compatibility, but that should get better soon with firmware updates. There is an interesting statement on the website now though.
BTW: A high AF performace FW update will be available in Q1,2020 for FUJIFILM cameras , especailly for GFX 100s and latest FX cameras.
It’s hard to tell if SteelsRing is strictly talking about in relation to their products with the above statement, but performance improvements are always welcome.
FEATURES:
1) Contrast based AF support to F-mount compatible type G, E and AF-P lenses
2) Auto aperture control for type E lens
3) Manual aperture lever for type G lens, real-time aperture control , nonadjustable from camera body, only the current max aperture is displayed in camera.
4) Full EXIF recording for supported lenses
5) Type D lens is not supported, AF is impossible with this adapter,EXIF is recorded.
6) Lens VR/OIS support
7) Support 35mm format mode of GFX
8) F-mount lenses AF performs better than EF lenses on GFX due to different AF driving mode.
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