Archived posting to the Leica Users Group, 2000/08/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Dan Cardish wrote: > > Check out the last row of images (it will be obvious which ones apply) in > the portfolio link at http://www.photoartworld.com/leica/. Try and > identify Photos A, B, C, and D. Hi Dan. In this resolution its really hard to find some differences. And in Addition it seems like you made the pictures with different apertures. Also the corners of the pictures look fuzzy in all of them, due to out of focus blur. The only obvious difference is the cool color balance in picture B, but it's not clear if this is the result of the lens or of changing lighting conditions or film processing. If this color cast is due to the lens I would suppose it's the Nikkor. I suggest a better test picture (yes I know, test pictures are stupid and boring). My favorite is a tree bark fully in focus on one side of the picture (distance to camera ~1m) and leafs with out of focus highlights on the other side. A tree has lots of fine structures to judge the sharpness. Its important that the tree structure reaches to the corner of the picture because sharpness in the center is usually equally good with all lenses, differences show up better at the corners. The out of focus highlights on the other side show the bokeh of the lens and, to some degree, might be able to reveal coma and chromatic aberrations. And because optical performance is more critical at large apertures (at f/8 performance of all lenses should be equal) you should shoot with the largest aperture available on all lenses, in this case f/2. Regards, Axel