Nikon Z 400mm f/4.5 VR S & TC-1.4x vs. 500mm f/5.6E PF VR & 400mm f/2.8G VR | Goodbye F-mount?

Can the new Nikon Z 400mm f/4.5 VR S replace my current wildlife lenses? It works amazingly well on my Nikon Z9, even with teleconverters, so it might be the end of f-mount for me after 18 years! Join me for some side-by-side tests of image quality, vibration reduction and autofocus speed... oh, and get a coffee, this is a long one ☕ Use these ‘chapter’ links to move to video sections and tests you’d most like to see: 00:00 Introduction 01:51 Nikon Z 400mm f/4.5 VR S First Impressions 04:57 Why did I buy this lens? 05:37 My current kit: Nikon 500mm f/5.6E PF VR 07:09 My current kit: Supertelephotos for low light 07:56 My current kit: Nikon 400mm f/2.8G VR 12:02 Why I am Interested in this Lens 13:35 Autofocus Tests 14:48 Autofocus Speed 16:05 Autofocus Subject Detection 17:52 Image Quality and Pixel Peeping 18:37 Test1 - Moving the camera for the same FoV 20:36 Test2 - Scaling for the same FoV 25:38 Test3 - Comparing uploaded images online 29:27 Vibration Reduction Test 32:33 My Thoughts and Conclusions 32:43 Do I keep the 400mm f/2.8G VR? 33:20 400mm f/4.5 VR S vs. 500mm f/5.6E PF VR... 36:40 My Ideal Wildlife Lens (and gold rings) 39:17 The end of f-mount for me? 40:23 Discalimer 42:10 Sample images and video My current wildlife lenses are the spectacular but somewhat slow Nikon 500mm f/5.6E PF VR, and the blazing fast but eye-wateringly heavy Nikon 400mm f/2.8G VR, and I use these on my Nikon Z9 (Z7 until recently) with an FTZ adapter. When...