Seeking guidance re: lenses for wildlife photography (birding, etal) on my Nikon d500.
I have the option to pick up, locally, a Nikkor 300mm/f4 AF-S for $450, or the Nikkor 200-500/f5.6 for $600; alternatively, can order a Sigma 150-600 HSM for <$900 new (Amazon, B&H, etc).
The 300 +1.4v2 tele is what I'm leaning towards specifically for the weight, but appreciate any thoughts/recommendations, thanks!
I do have the 300mm f4 AF-S and the Sigma 150-600mm C and I have used them on the D500 and the D810. I've also had the chance to shoot with multiple samples of the 200-500mm f5.6. My experience with them has been as follows:
(the TLDR version): if there is nothing wrong with the used Nikkor 200-500 f5.6 you should buy it. At 600 $ it is a steal.
The long version:
AF speed (from best to worst): Nikon 300mm f4, Nikon 200-500 f5.6, Nikon 300mm f4 with 1.4xTC, Sigma 150-600mm (and quite far behind the Sigma and the f6.3 long end doesn't help it, even on a D500).
Sharpness wide open (from best to worst): Nikon 300mm f4(by a mile), Nikon 200-500 f5.6 (best sample I've encountered), Sigma 150-600mm (no replacement for displacement), Nikon 300mm f4 with TC1.4x, Nikon 200-500 f5.6 (worst sample I've encountered).
Versatility (from best to worst): Sigma 150-600mm, Nikon 200-500mm f5.6, Nikon 300mm f4 + TC.
Two notes on versatility:
1) For me and the way I shoot, the 300mm f4 is top of the list as there isn't much between 500mm and 420mm at closer ranges due to the Nikon's focus breathing and the close-up abilities of the 300mm make it a brilliant lens for shooting medium and large insects without making them run away. Also, if the subject is friendly enough, 300mm f4 is brilliant on it's own.
2) I rank the Sigma zoom as more versatile than the Nikon due to the larger zoom range, the better handling (center of mass is placed better, zoom ring is a bit better) and the large amount of configuration options via dock (e.g: custom focus limiter).
Quirks (in no particular order):
The Nikon 300mm f4 AF-S motor is prone to failure. If it squeaks, it is on it's way out and it can't be repaired. Also, it's aperture blades are exposed at the back and can get gunk on them and seize up.
The sample variation I've seen in the 200-500mm f5.6 is much larger than I've seen with the Sigma 150-600mm.
The Sigma 150-600mm O.I.S system is the worst of the bunch and has strange interactions with the D500's 10fps (depending on the settings, you can end up with every other shot blurry when using the Sigma due to the OIS being slow to reset). I don't get this on the D810 at 6 fps...