Originally posted by luftfluss Oh, I have little doubt that the Pentax could match or maybe even edge the Nikkor in terms of optical quality. Beyond that, it becomes features vs features, with both sides scoring points. But currently the Pentax is $800 more expensive.
If I were in the OP's position and mindset, I'd seriously consider a Nikon body + 200-500 or Sigma/Tamron 150-600 as my wildlife rig, and Pentax for everything else.
Please notice how I didn't put the price difference on quality alone, specifically mentioning other factors.
Actually the 200-500 is amazingly inexpensive; no 100-400 would go as low (let's not mention the new Sony
). What's the catch?
Yes, a D500 + 200-500 looks like an amazing combination for wildlife; mostly because of the camera. Then there are the third-party options not available for Pentax, which might give you some extra reach for cheap.
As a hardcore wildlife kit, this would be my recommendation (with a caveat: I didn't test it myself. That's why I'm not in a hurry to actually recommend it
).
Otherwise, Pentax is far from incapable - I guess we both agree; and a "dedicated wildlife lens" (the 150-450) keeps them in the game.