Ciao guys and welcome back, it's your friend Luca and in today's video we will have a look at the Voigtlander SL Ultra 40mm F2. An amazing, little and light weight lens that I love to use with my Lumix S5 and S1. These lens produce beautiful images with a great 3D pop typical from German lenses, like the Leica or Zeyes. But it's not playing in the same league because of few compromises to keep small, the size and weight of the lens. In reality the only reason why I like to use these lens is because I like the 40mm focal length and I like the size and weight. The lens has a fast aperture of F2 and it can be closed up to F22. The F-stops are closing by one stop when turning the ring. So there are not half or one third of a stop in between, like F3.5 for example. If you're planning to use the lens on a mirrorless camera, I recommend you buying the Nikon version of it. Because with the right adapter ring you will have a de-clicked lens. These lenses came focused as close as 0.38m for the version 1, the one that I have, and 0.25m for the version 2. Wide open at F2, the center sharpness is pretty good, but the corner sharpness is poor. And the lens suffer from strong chromatic aberrations. If we stop down the lens to F2.8, the center sharpness improves a lot and the corner sharpness starts to be ok. The chromatic aberrations get lower. The sharpest point of the lens is measured at F8 both for the center and for the corners. As we can see, the distortion is well controlled, but the heavy netting is pretty strong at F2. It's gonna get reduced by F2.8 and it will totally go away at F4. Regarding the transition from the defocused to the focused areas, I have to say that this lens is doing a great job in this aspect. The transition is pretty smooth and this can help a lot to give a very nice 3D pop in our pictures. The main issues you can have with these lens are the Longitudinal and the Asphetical Chromatic aberrations. We can see the Longitudinal chromatic aberrations from F2 to F4, but that is appear at F5.6. While the Asphetical Chromatic aberrations are visible at all the apertures, and because of this problem of chromatic aberrations, the bokeh is not always great, because with some strong source of light, we can see big onion rings going on in the bokeh balls. Regarding the focus breeding, I consider this lens pretty wild, as we can see at F11, the lens is sort of zooming in and out in a really evident way, so if you plan to use the lens for video work, I recommend you to frame your composition a bit wider in a way that you can crop and post. To hide the effect of the focus breeding coming out from these lenses, if you're planning to do focus racking. The sun stars with these lens are nothing special, like we are used to see with bokeh lender lenses for Lega and Mount, mostly because we have 9 curved aperture blades that are great for portraits, but not that great for landscape photography. The color rendition of the lens is okay, I consider that it has its own character in this aspect, because the colors have a sort of pastel effect, so there is not really a great color separation, and this can be a positive or a negative aspect of the lens, it mostly depends on what project you want to use this lens. I consider the lens flares of this bokeh lender 40mm F2 pretty unique. At F2, we can see a really strong red circle around the main source of light, but it will disappear at F4, and the included lens suit doesn't really help to reduce this lens flare. I consider this lens great for everyday shooting, but if I need supreme image quality for some photography projects, this lens is not coming with me, because of the many optical compromises. Anyway, I love the character of this lens with all its defects for video work, there is where the lens is shining. So this is it for today guys, I hope you enjoyed the video, thank you so much for watching and I'll see you next time. Ciao!