Nikon 100-400 compared to Sigma 100-400?

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z2122 Senior Member • Posts: 1,977
Nikon 100-400 compared to Sigma 100-400?

Since 1 year I have the Sigma 100-400 and I am using it on a Z6. So far the IQ is good, also compared to a 70-200f4G and to a 24-200Z . The center sharpness is the same , the 70-200f4G is a little bit sharper on the edges compared to the Sigma 100-400.

Now I ordered the Sigma 1401 TC and tested it. There is a very light improvement when I compare the pictures with or without TC at the same size ( object have the same size on my monitor) but this improvement is hardly noticeable in real life images. So it's easier to crop (and maybe upscale in LR) if I need more reach, than to mount the TC and I will not loose another stop of light and get quite high ISOs, because I need also to stop down the Sigma 100-400 by one stop to f8 when using the TC .. so I end up with f11. I will send the TC back.

Now my questions and maybe you can help:

  • Is the IQ difference of the Nikon 100-400 noticeable compared to the Sigma 100-400 (mainly at 400mm on a Z6)?
  • is the Sigma too "weak" for a Z7 sensor (Maybe i will upgrade in the future) and could this be a reason to get the Nikon 100-400?
  • Is it worth to get the Nikon 1.4 Z TC when I have the Nikon 100-400 , or is the effect on the IQ low when compared to a cropped picture?
  • Can I use the Nikon 100-400 with a TC wide open at 400mm and do I still get good results?

I thiught also about the new 400 4.5, but ai need the flexibility of a zoom.

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 z2122's gear list:z2122's gear list
Nikon Z6 Nikon AF-S Nikkor 70-200mm F4G ED VR Nikon Z 24-70mm F4 Nikon Z 35mm F1.8 Nikon Z 85mm F1.8 +11 more
Nikon Z 100-400mm Nikon Z6 Nikon Z7
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