Sigma 100-400mm f/5-6.3 DG DN OS Contemporary Lens (FUJIFILM X)

Well suited for bird, sports and wildlife photography, the combination of excellent optical performance and attractive features makes the new 100-400 f/5-6.3 DG DN OS |Contemporary Zoom easy to recommend. Old f/5 is the New f/2.8 As long 100-400mm class zooms go, f/5-f/6.3 is not slow.

The difference in price between the Sigma and the Fuji options will probably mean that there are plenty of people who would be willing to do deal with a few more autofocus frustrations to get a quality telephoto lens that they can afford.

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  Nice build quality including some weather sealing and premium materials, Slimmer and lighter than competing lenses, Fairly good tracking results for birding or fast action, Excellent image quality…particularly at the very important 400mm position, Nicer bokeh than many variable aperture zooms,...

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  Autofocus can be frustrating at times, Tripod collar a separate purchase, Variable aperture zoom reaches smaller apertures very quickly, No TC options available on Fuji

Sigma has beaten the competition in being the first third-party lens maker to offer a native, mirrorless-optimized full-frame super-telephoto zoom for Sony's E-mount, and at just $950 it is a very attractive alternative to its name-brand competitor.

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  Impressive image quality, High-quality build, Fast, reliable autofocus, Portable size (for the zoom range), Incredible overall value

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  Tripod collar/foot is an additional expense, Zoom & focus rings switched position, Vignetting correction not perfect, requires additional help & causes faint color shift

What does this mean ?

When you consider Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary lens' superior build quality, uncommon versatility, exceptional imaging performance, superb handling, built in 4-stop OS system, enhanced close-up capability, and excellent AF system there’s a lot to like about this lens, and its...

…for under a thousand bucks. The fact that Fuji’s own 100-400mm is getting a little long in the tooth won’t hurt, either, though there are still a couple of areas where the Fuji has the advantage (compatibility with teleconverters, for example).

A telezoom with plenty of reach, full-frame coverage, and a friendly price

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  High-quality build, Stabilized optics, Quick, quiet autofocus, Useful on-lens controls, Built-for-mirrorless design

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  Teleconverters not available for E-mount version, Not fully protected from dust and splashes, Struggles with high-resolution sensors

It's no secret that Sigma lenes don't perform as fast at AF on Panasonic cameras as Panasonics own leses. However I promise that with a littler patience and tinkering you will be capturing some stunning wildlife photos.

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  Great Features, Great Picture Quality

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  Bit of a learning curve, Not the fastest optics or AF

I photograph birds and then make drawings from the birds. I was using a 24 to 200 on my A7III but wasn't getting the shots I wanted. I tried the Sony 100 to 600 G but that is a seriously bulky lens for my old arthritic hands!

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  Fast focus, Great Picture Quality, Lightweight, Quiet, Simple Controls

I bought this e fit lens after using my old Canon fit 100-400 with a Sigma adapter which I was very happy with. So far the new lens is still good, but I'm not yet sure if it beats the old one?