Upload & Sell: Off
Daan B wrote:
I did sharpen the output in LR (for web). But it isn't so much sharpness that is bothering me, because that seems fine, but rather the glowing effect on high contrast areas. It reduces (micro) contrast considerably IMO. I only showed the 200% image to make it visible. But viewing at normal sizes you can see a distinct difference between f/2.8 and f/4 for example. And I find it strange that this glowing on high contrast areas doesn't appear at 16mm f/2.8 and 35mm f/2.8.
The type of sharpening I suggested (which, if you use Photoshop, would be done using USM) works to enhance edge contrast across some pixels and will lessen precisely the effect you are concerned about.
I'm not a LR user, so I'm afraid I cannot give you an idea of how to do this in that program, but a general sort of sharpening that I apply in Photoshop uses:
1. A "smart sharpen" operation with a small radius (between .5 and 1.0 in general) and a fairly large amount (starting at around 150). The effect of this is to sharpen small details and fine edges. There are other options that do something similar. For example, a few years back I heard that Canon was recommending something like amount:300 and radius:.3. I might use that or something like it for a very finely detailed image.
2. An unsharp mask (or USM) layer to generally increase contrast near edges such as those you are concerned with. If you have a dark area against a light area, this slightly darkens the already dark side of the border and slightly lightens the light side. (E.g. - it would make the upper edge of your cup lighter and darken the area right above that edge where you see your "glow.") My starting point for this is to go to the USM option and use a relatively large radius of 50 with a relatively small amount of 12. Again, there are numerous variations on these values depending upon the nature of the image and what lens you use and so forth, but these can be a good starting point.
I often see that "sharpness issues" can be resolved by using more effective sharpening operations in post.
If you can do this, it is worth a try. If you started with a raw image, I think it is more or less necessary.