p.1 #2 · Nikon Z adapter for Sigma 14mm f/1.4 - Leica L or Sony?
No one makes an L-to-Z autofocus adapter. It should be possible, but I suspect that the relatively small universe of potential customers hinders development. E-mount to Z-mount is a different story, with many adapters available. The Megadap ETZ Pro+ is the nominal/current favorite.
However, be aware that when adapted to Nikon, fast ultra-wide e-mount lenses may show degraded sharpness on the image edges/corners unless stopped down significantly. This is due to the different sensor stacks on Nikons vs Sonys.
I don't have experience with that Sigma, but I tried a Sony 14mm GM for a while, and found the adapted performance was too compromised. You may want to try it/rent the Sigma before buying, to make sure the performance is what you expect.
p.1 #3 · Nikon Z adapter for Sigma 14mm f/1.4 - Leica L or Sony?
MikeEvangelist wrote:
However, be aware that when adapted to Nikon, fast ultra-wide e-mount lenses may show degraded sharpness on the image edges/corners unless stopped down significantly. This is due to the different sensor stacks on Nikons vs Sonys.
This was, until not long ago, widely believed to be the case. I certainly thought it was.
However, some of us have recently found that newer, slightly thicker adapters greatly improve the Sigma Art 14mm f/1.4's corners on Nikon bodies. I have found this to be the case on my Z8. See this thread. Now, I'm quite happy shooting this lens wide open for Milky Way nightscapes, even to the corners. I'm using a Fotodiox adapter (having found the earlier-than-current Megadap awful anywhere near the corners, and the newer Viltrox unworkable). Forum member DWOfPaul considers the current (and newest of this group) Megadap ETZ Pro + to be still better. I'll bet he's right. (I'm happy enough with the Fotodiox that I haven't checked, but likely will eventually.)
p.1 #4 · Nikon Z adapter for Sigma 14mm f/1.4 - Leica L or Sony?
Unfortunately, there is no L to Z smart adapter yet. I hope someone makes one because it would be awesome to use Sigma lenses + TCs on Nikon Z and not have to deal with Sony's TC limitations on third party lenses.
As Chris mentioned, I have been very happy with the Megadap ETZ Pro + and Sigma 14mm f1.4 E on Nikon Z. Take a look at that thread, as I shared some tips I found on how to get the best results: https://www.fredmiranda.com/forum/topic/1896885/1#16878227
p.1 #5 · Nikon Z adapter for Sigma 14mm f/1.4 - Leica L or Sony?
Chris S. wrote:
This was, until not long ago, widely believed to be the case. I certainly thought it was.
However, some of us have recently found that newer, slightly thicker adapters greatly improve the Sigma Art 14mm f/1.4's corners on Nikon bodies. I have found this to be the case on my Z8. Forum member DWOfPaul considers the current (and newest of this group) Megadap ETZ Pro + to be still better. I'll bet he's right. (I'm happy enough with the Fotodiox that I haven't checked, but likely will eventually.)
Could be that the differences in optical design of the Sigma 14mm allow it work better, but the Sony 14mm GM had very bad sides/corners when I tested it on the latest Megadap ETZ Pro+. I had to stop down to ƒ4 for them to be even acceptable.
p.1 #6 · Nikon Z adapter for Sigma 14mm f/1.4 - Leica L or Sony?
MikeEvangelist wrote:
. . .the Sony 14mm GM had very bad sides/corners when I tested it on the latest Megadap ETZ Pro+. I had to stop down to ƒ4 for them to be even acceptable.
Could it be that the 14mm GM requires additional correction in camera or post that Nikon bodies aren't programed to do or indicate in the raw images? I have a vague notion that at least some GM lenses lean this way, but don't know if it is correct.
p.1 #7 · Nikon Z adapter for Sigma 14mm f/1.4 - Leica L or Sony?
Chris S. wrote:
Could it be that the 14mm GM requires additional correction in camera or post that Nikon bodies aren't programed to do or indicate in the raw images? I have a vague notion that at least some GM lenses lean this way, but don't know if it is correct.
No, it's not about corrections; the edges/corners are simply not sharp at wide apertures. I was very disappointed, as the 14mm GM was one of the lenses I hoped to continue using when I went to Nikon.
