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Message: <blockquote data-quote="Clovishound" data-source="post: 830218" data-attributes="member: 50197">The only F mount I have is the 200-500. Like I said in my original post, I wouldn't mind upgrading that to the Z 180-600, but not sure it's worth the $. Most of the comparison reviews say, if you have the 200-500, just stick with that. I currently have the 24-70 F4 and 105 micro in Z mount. Both are S line lenses.Right now, my main frustration is with AF on moving subjects. My understanding is that the Z8 has the same AF system as the Z9, and it tracks birds and other animals extremely well. I'm not willing to spend the money on the Z8 and the 180-600. I could get one of the long Z primes, but I'm afraid I would still be spinning my wheels on a lot of shots because of the AF on the Z7ii. The Z long lens that I could justify the money on right now are:FYI, price comparisons are at current prices, some of which on currently on sale.A. 600mm F6.3 - This is about as expensive as I could feel comfortable with. It is probably a little sharper, and more robust than the 180-600, but gives me the same reach and no boost in aperture. Would be a boost in reach and a draw back in aperture from current. S lineB. 400mm F4.5 - A grand less than the 600. 1/2 stop gain in aperture, 100mm less reach than current.C. 100-400 F4.5-5.6 - $500 less than the 400. No gain in aperture, except at shorter end. More flexible on the short end, less reach on the long end than what I currently have. S lineD. 180-600 F5.6-F6.3 - $400 less than the 100-400. Lose 1/2 stop on long end, gain extra 100mm in reach from current. Internal focus and zoom, which may translate to better long term durability and internal cleanliness. Not an S line. Won't fit in my current bag. Unless I come into more money that I can foresee, I probably won't have the $ for something like the Z8 in the future, but would very likely be able to swing the 180-600. FYI, I am currently satisfied with my 200-500 performance. I wouldn't mind having an extreme wide angle lens, and something like a 70-200. I probably wouldn't use either that much, with the wide lens probably used more than the 70-200. If I get the Z8, I could put my long lens on it and leave it most of the time. I could then use my Z7ii dedicated to macro and leave it. Sensor resolution is basically the same between the two cameras, with the exception of low light noise, and I almost never use high ISOs on my macro shots.I know it sounds like I'm talking myself into the Z8, and perhaps I am, but this is my honest appraisal of where I am at, and what is in front of me.</blockquote>

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