Archived posting to the Leica Users Group, 2010/08/28
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jim - My Canon wide lenses show awful chromatic aberrations. I hardly ever see them with Leica lenses. That's one reason I was so glad to get back to Leica. I still have to go back fix the CA every time I want to use a photo made with the Canon wides. This is what Alamy says about CA: "Chromatic aberration or ?coloured fringing? is shown as magenta/green or red/cyan fringing in areas of an image that have greater contrast. Poor quality optics and extreme wide-angle lenses tend to show Chromatic Aberration especially towards the edge of the frame. To remove this you can use the Chromatic Sliders in the Lens Correction Tool in Photoshop, most RAW conversion software has a similar tool. " They used to suggest an action that I use on the Canon photos using Guassian Blur (12 or higher) > Edit > Fade/Color and the history brush to brush out CA. I've never been able to get rid of it using the Chromatic Sliders. Unless you're trying to get photos past quality control for a stock agency, I wouldn't worry about it. Tina On Sat, Aug 28, 2010 at 2:03 PM, Jim Nichols <jhnichols at lighttube.net>wrote: > George, > > I decided to try the 35 Macro on the E-1, which causes me to change two > variables. First, no flash is involved. Second, the E-1 uses a Kodak > sensor. I see no signs of the chroma problem in this example, or others > that I examined. > > I now suspect that the fill flash, on the top of the camera, could > contribute to the top edge problem. But it sure allows me to get insect > images that I cannot get without it. :~(( > > http://gallery.leica-users.org/v/OldNick/Rose+of+Sharon.jpg.html > > Comments and critiques welcomed. > > Jim Nichols > Tullahoma, TN USA > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > > -- Tina Manley, ASMP www.tinamanley.com