Archived posting to the Leica Users Group, 2020/03/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]A sample image of the corner of the 75mm image, taken at f/2, is shown at https://www.paulroark.com/75mm-Apo-Summicron-f2-corner.JPG . I've also posted a comparison shot of what Topaz Gigapixel AI does to improve the corner slightly. Paul www.PaulRoark.com On Wed, Mar 18, 2020 at 3:23 PM Paul Roark <roark.paul at gmail.com> wrote: > As we would all expect, the new Apo-Summicron is so good that the corners > even at f/2 are excellent. When files are opened in Photoshop with the > color fringing option activated, the image is nearly perfect. However, if > then processed with Gigapixel AI you get perfect sharpness corner to corner > even at f/2. (Gigapixel AI does sharpen it off axis, noticeable mostly on > the monitor at 200% magnification. The main thing the sharpening software > does is extend effective DOF a bit.) This lens deserves the Leica > "Apo" label without question. (I'm using it with a Sony a7r4, modified > with the KoloriVision Ultra Thin cover-glass.) > > The 28 and 75 are my traveling duo. (Anyone want an older 75 f/2.5 cheap?) > > FWIW, > > Paul > www.PaulRoark.com >