macwalter
Well-known member
I have had the z 100-400mm for a couple weeks now and have tested it on BIF and also small birds in by backyard. I have used it with a 1.4TC as well. The basic lens without the TC works great for BIF. I’m talking small fast birds like shore birds, terns,peeps, willets etc, not just bigger birds like herons etc. with the z8 the AF is super, I’m still adjusting to mirrorless vs my old D850. I have several AF settings programmed into the camera and a button to turn subject detection on and off. I don’t use 3d much in these situations. With the 1.4tc it stil works quite well for BIF but will sometimes fail to keep up with faster birds coming in close. The image quality and quick AF with the TC was better than I expected. I also have the 500pf and with a 1.4tc on the z8 it works very well. This lens is tack sharp. Personally I love the 500pf but having a lens that can close focus to around 4 feet for insects etc and with the TC go to 560mm is pretty darn useful I find. I am very picky about detail and so far I find there is enough for me. I mainly handhold as I walk long distances and Im not as interested in super long glass as I can’t hand hold anything longer than what I have. I’m sure the 180-600 will be just fine and probably better than the 100-400mm with a TC, but by how much I wonder. As for bokeh, I can deal with that in post. But the 180-600 is heavier and I suspect the AF won’t be as fast as the 100-400. If your a tripod shooter than the 180-600 makes more sense to me. The other thing, I’ve heard that it doesn’t have a manual focus ring on it. If so this is a deal breaker for me. Mirrorless cameras seem to need more help getting on point in certain situations and the focus ring on the 100-400 is perfect and the fact you can adjust the throw is great. I guess it also depends on where you photograph but I try to avoid situations where I have to photograph birds from more than say 50 yards for smaller stuff and maybe a 100 yards for bigger stuff. Not always possible of course.