I purchased this lens for wildlife photography and have been delighted with its performance. I use it with a Fuji X-H2s which together make a great combination. The lens is quite big for some of Fuji cameras so will really benefit a battery grip to balance and make handling easier. The only fault I would mention is that the tripod foot which although is a beautifully made part of the lens, unfortunately causes a balancing problem when using on a gimbal. This is due to the Arca Swiss machining of the foot not extending through the length of the foot, which means you have to use an additional Arca Swiss mounting plate to balance the camera and battery grip. This may be a small gripe but if you intend using this lens frequently as I do on a gimbal it's annoying in ... MoreI purchased this lens for wildlife photography and have been delighted with its performance. I use it with a Fuji X-H2s which together make a great combination. The lens is quite big for some of Fuji cameras so will really benefit a battery grip to balance and make handling easier. The only fault I would mention is that the tripod foot which although is a beautifully made part of the lens, unfortunately causes a balancing problem when using on a gimbal. This is due to the Arca Swiss machining of the foot not extending through the length of the foot, which means you have to use an additional Arca Swiss mounting plate to balance the camera and battery grip. This may be a small gripe but if you intend using this lens frequently as I do on a gimbal it's annoying in having to remember the additional plate before leaving home.

So far I've only shot locally with the 150-600 lens, for two days, and not with my full tripod rig; only with the excellent 3LT monopod with Wimberley head (on the XT-4). I was worried about its extra weight and length compared to the 100-400, but in practice I found those differences trivial. This combination makes for aterrific birding assembly, for weight, portability, and image quality alike. IQ so far is intermittently extremely good (subject to the vagaries of such a handholding/partialsupport setup). The f8 limit at the long end requires (and rewards) pretty good light and extra care. For that reason I haven't tried it yet with the 1.4 extender. But I shot an egret with the kit above at about 75-100 yards andcaptured outstanding feather detail, and, as ... MoreSo far I've only shot locally with the 150-600 lens, for two days, and not with my full tripod rig; only with the excellent 3LT monopod with Wimberley head (on the XT-4). I was worried about its extra weight and length compared to the 100-400, but in practice I found those differences trivial. This combination makes for aterrific birding assembly, for weight, portability, and image quality alike. IQ so far is intermittently extremely good (subject to the vagaries of such a handholding/partialsupport setup). The f8 limit at the long end requires (and rewards) pretty good light and extra care. For that reason I haven't tried it yet with the 1.4 extender. But I shot an egret with the kit above at about 75-100 yards andcaptured outstanding feather detail, and, as an unexpected proof-of-quality, a damselflyin clear view on a reed a few feet off center from the bird.After reading reviews I originally bought this lens expecting to return it after comparisonwith the 100-400. I'm no longer sure about the fate of the shorter lens, but I will absolutely keep the 150-600. For me it won hands down.

Since I already had a 100-400 lens, I purchased this lens for the reach. And it was the 400-600 range that I was most interested in. I initially started comparing them with the idea that I might return this lens or keep it and sell my 100-400. However I have decided to keep both of them.My only issue with the lens is that I have a hard time focusing it. Initially this led me to worry that the lens might not be sharp. However after some careful and methodical experimentation I decided the difficulty was with me and not the lens. I did the following to check it.1. put it on a tripod.2. put it on manual focus.3. turn off image stabilization.4. take images at various focal settings.I also compared this to my 100-400 and 50-140 lenses and with and without a ... MoreSince I already had a 100-400 lens, I purchased this lens for the reach. And it was the 400-600 range that I was most interested in. I initially started comparing them with the idea that I might return this lens or keep it and sell my 100-400. However I have decided to keep both of them.My only issue with the lens is that I have a hard time focusing it. Initially this led me to worry that the lens might not be sharp. However after some careful and methodical experimentation I decided the difficulty was with me and not the lens. I did the following to check it.1. put it on a tripod.2. put it on manual focus.3. turn off image stabilization.4. take images at various focal settings.I also compared this to my 100-400 and 50-140 lenses and with and without a 2x extender.My conclusion was that it is difficult to focus if the scene is cluttered. Using auto focus it almost never picked the thing I wanted it to focus on. But that is no doubt the fault of the scene and the fact that most of it would be out of focus.The picuture is at 600mm and the focus is on the water falling down from the infinity pool. It is not focused on infinity