This Nikon AF-S Nikkor 300mm f/4E PF ED VR lens review for birding is by Willy Alfaro Cervantes:
In mid October I lead a bird watching trip, 10 days around Costa Rica, photographing birds. I used a Nikon D7200 with the Nikkor 300mm E PF ED VR and a Nikkor TC-14E III. All pictures were taken handheld
The camera
The Nikon D7200 has 24.2 megapixels in DX crop and native ISO 100-25600, very convenient for the challenging light in the Tropical forests. It also has a 1.3x crop that allows you to shoot 7 fps, which turns your lens 2 times “longer”, so roughly the lens with the TC that are 420mm end up being equivalent to 840mm at 15.4 megapixels (the D810 in DX is 15.4 megapixels).
Barred Antshrike – Nikon D7200 with Nikkor 300mm f/4 PF + TC-14E III, 1/500s, f/5.6, ISO 3200