Nikon Ai-S 400mm f/2.8 review
5 months ago I bought this heavy, but amazing lens for wildlife videography. I use it adapted to Samsung NX1 (APS-C) through Kiwi adapter and sometimes with TC 301.
There are only a few stills or reviews of this lens on the internet, so I'll make some unprofessional.
First of all, there are some videos taken with this lens. All of them are shot wide open:
Every following picture is shot with different aperture. As you can see, it's very sharp wide open, only little less than stopped down. The sharpest is f/8.
Chromatic aberration also isn't as bad as I suspected, in fact this lens has much less purple fringing than most of nowadays cheaper lenses.
Some blue fringing can be seen in contrasting places on this inexpert test photo (f/2.8), but only very thin traces.
Some CA is also on this woodpecker's legs, tail and wings. Also shot at f/2.8, 100% crop.
Focusing is very easy and comfortable. When the camera has viewfinder and display in good resolution I even don't need any focus peaking or zooming. I always get the object in focus with no failure.
I highly recommend this lens to anyone, who does not mind manual focus and who wants to shoot WL, sports or anything else far away. There are still some well priced on eBay.
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