I everyone. After giving up on Olympus body cap 9 mm (I found on samples that the soft corners were visible even in websize images), I finally bought the Samyang 7.5 mm. I was not a great fan of fisheye lenses... but: affordable price + good IQ reputation + no other wide prime + I think I'll have the use for it on my next trip... all this made the decision. I'm learning to use it properly. Never had neither a fisheye nor a MF-only lens before. The focus scale is not very helpful (very long from 0.09 to 0.25 meters, and then very short to infinity) and it's too bad there's no automatic zoom/focus peaking when using the focus ring. However, I like the "stiffness" of the ring: it will not turn easily against your will. I seem to get better results in setting the focus ring just before infinity, and aperture around f/8 or just a little wider. So far, I've been pretty impressed with the images produced by this lens. When defishing the lens with Lightroom, the corners are a little weird, but considering the ultra wide angle of view (it seems to be wider than a rectilinear 7.5 mm), if you reframe a little, it's totally usable. I don't plan to defish all my images, but it can be useful sometimes (and you can also use lower percentages if you want to lower the "fisheye" look a little) Anyway, as I'm just starting with this lens, I wondered if some more experienced users had some tips/hints about how to get the best of this lens. (how to use the lens, or the body with this lens, what mistakes to avoid when using it, etc... etc...) Thanks in advance for your answers.