Just a little update here. After using the 300mm f/4D with and without my 1.4x TC for a couple weeks, I decided to return it to
KEH. I didn't like using a lens at that long of a focal length without VR. When I did get good shots, they were sharp, and the 300 definitely lives up to its reputation. However, I'd much rather have VR to make hand-holding an easier task when I can't or don't want to carry a tripod/monopod around with me.
After some more thought and research, I ended up with a mint condition Nikon 70-200mm f/2.8 VR I. While it obviously won't have the reach of a longer lens, Thom Hogan gave it a great review, especially for use on DX cameras. In addition, and probably most importantly, he noted its stellar performance with teleconverters, saying...
"Performance with the TC-14E teleconverter is nothing short of astonishing. How good is it? Well, I can't see any differences between the 70-200mm at 200mm with a TC-14E and the highly regarded 300mm f/4 AF-S! That's both unexpected and unprecedented. In other words, if you need a 300mm f/4 AF-S, just get the 70-200mm and a TC-14E. You'll get a more versatile lens and lose no sharpness.
With the TC-20E teleconverter, the results are still good, but sharpness is slightly compromised in the corners. I would characterize the results as being a "better-than-adequate" 400mm f/5.6. You might be able to do better with a dedicated 400mm or the 300mm f/4 AF-S with a TC-14E, but the 70-200mm and TC-20E combination will get you by if you don't have one."
Those statements were enough for me to pick one up, and I'm glad I did. It's fantastic on its own, and works very well with my 1.4 TC. I'm going to pick up a 2x TC as well for those times I really need to reach out far. I know there's a general loss of IQ when using TCs, but since I'm not selling my shots to National Geographic, that fact is not a deal-breaker for me. With the two TCs, I have a pretty nice focal length combo after crop factor is taken into consideration:
- 105-300mm f/2.8
- 147-420mm f/4 (1.4x TC)
- 210-600mm f/5.6 (2x TC)
I know that at f/5.6 it almost certainly won't be as sharp as the Nikon 200-500mm, but this is a much more versatile solution for me. I did look into getting a 70-200 VR II, but they're about $400-500 more than the VR I and I don't like the focus breathing it does at the minimum focus distance, becoming more like a 135mm as opposed to 200mm at distances under 10 feet.
I'm really happy with this lens so far, and thanks to the build quality and sharpness, can see myself enjoying it for years to come.