Karen: I have never owned or used the 600pf, so I can’t speak to that. I do own and use the 180-600 on my Z8. I think it is a great lens. I really like its versatility. In Steve’s post of his shots of the wild horses in Theodore Roosevelt NP, I commented to Steve that I notice that he used the 180-600 in three of his five posted shots, and that I really liked the 180-600 for its versatility. In his reply back to me Steve stated “The zoom was essential for these-they are always moving and being able to adjust the crop on the fly is really helpful.” I took this shot of the Barn Owl, at 180 on the 180-600. If I had had a 600 prime on the Z8 at the time, I would not have been able to get this shot.I'm considering a 180-600 or a 600mm pf. I see a lot of BOTH lenses for sale used. Any idea why?
I think some people’s disappointment with the 180-600 may just be an expectations issue. It is a great lens, but it is (was) a $1,699 lens, and it is never going to compare to a much more expensive prime especially at 600. There may be greater copy variation in the 180-600 than in the more expensive lenses. I know that was an issue with the 200-500. I had an exceptionally sharp copy of that lens, but when my wife purchased a 200-500 it was clearly not as sharp, even on the same D850 body.
I also think a lot of people shooting a long lens on a high MP count camera (like the Z8/Z9) are experiencing camera shake which translates into less than sharp shots. If they increased their shutter speed considerably I think that would help them get sharper shots.
If you think you would benefit from the versatility of the 180-600 range, I would not hesitate to buy one. Ken
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