Archived posting to the Leica Users Group, 2010/08/28
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks for your comments and the quote, Tina. Since my photos are for my own pleasure and "show and tell" on the LUG and a couple of other sites, I won't worry too much. I really hadn't noticed the case that George spotted until he called my attention to it. Jim Nichols Tullahoma, TN USA ----- Original Message ----- From: "Tina Manley" <images at comporium.net> To: "Leica Users Group" <lug at leica-users.org> Sent: Saturday, August 28, 2010 1:18 PM Subject: Re: [Leica] IMG: Eliminating Chroma > 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 > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > >