On this topic, the vignetting is rather severe. It robs the corners of all detail and exposure, although I do like how it looks. Again, it's the weird character of the lens which first drew me to it. This is not a "get it right in camera" kind of lens, post processing is a requirement.

How to use it properly

This isn't a lens that you can rush with, you get out what you put into it. To use this lens to its fullest, you need to slow down, take your time as you would with a film camera. Without focus confirmation that many of us are used to, it's easy to just assume something is in focus because it looks right in our minuscule little viewfinder. Even when using focus check, it's still hard to tell for certain if something is in focus. I find myself taking 2, 3, or even 4 of the same shots with the focus slightly changed. This is especially true for paid work, where I really can't afford to miss an important photo. It's something you really have to live with when using this lens, it forces you to slow down and be a more calculated photographer. This isn't a bad thing, but it may turn many away from this lens because of its niche status. It's not for everything, but when you realize that, it becomes a very powerful tool. There's no lens like it in Fuji's lineup.