Mon 07-Oct-13 12:13 AM | edited Mon 07-Oct-13 12:15 AM by stormpeak
Hello, all. I was recently out in the Everglades with my brother-in-law trying out his new D800 (he's trying to get me to buy one). When we looked at some of the shots closely, we found a faint border or outline around the subjects. I've attached a couple of good examples of this problem. The shots may not be the best, but I think they illustrate well what we've noted. Can anyone give me some insight on why this would happen? Is it due to the camera? Poor technique? Lens issue?
If you were looking at the image on the LCD screen, you would be seeing the embedded jpg, which would reveal any oversharpening. I would check the camera control setting to see what sharpening value is set. I agree with the other posters that the images look oversharpened.
If the same effect is visible on the RAW files in camera then two possibilities : 1) there is a filter on the front of the lens. Tele zooms don't like filters. 2) In camera sharpening is set quite high. this should not affect the RAW data but will affect the jpeg that is embedded within it for viewing purposes.
there are also options for edge noise reduction and automatic CA removal and so on that could be having an effect. I don't use them so wouldn't know what they look like.
On the CA removal thing...Shooting twigs against a bright overcast sky would be a good recipe for strong CA so a CA removal tool might end up creating artefacts such as these - pure speculation on my part as I don't have that lens and have not used one.
Thanks for your invaluable feedback. If you have any other ideas, please toss them my way.
For now, I'll just blame my brother-in-law for using bad settings. Seriously, we're going to work on those settings and he may replace his filter. We'll take several more test shots soon. Hopefully we can get the issue fixed before our Yellowstone trip in a couple of weeks so he can use his D800 with confidence.
I will probably take my D7000 unless he finally convinces me to upgrade.
Try taking similar pics with and without to confirm if the filter is the culprit. A better filter may not solve the problem. Long zooms tend not to play nicely with filters. By all means keep the filter fitted to protect the lens in storage and transport but remove when shooting.
It looks like a sharpening halo to me. With the resolution of the D800, you can see detail if you look very closely tha tmight not be visible otherwise.
What are your camera picture control settings?
How are you handling RAW conversion and post processing?
Are these cropped images?
While sharpening can create this type of artifact, contrast and other tools can also create similar effects. The in-camera and View NX2 sharpening setting (as well as Quick Fix in Capture NX2) for sharpening use a relatively large radius - which is what you have here. I use a light touch on sharpening to prevent halos and artifacts if I need to crop severely.
Normally the sharpening for D800 images can be a little more aggressive since 4 pixels for the radius is small relative to an image 7000 pixels wide. But I find the in camera sharpening to be rather crude.
I've had outings along the lake Michigan shore where sand got through my jeans and lodged in my socks. 60 knot breezes will do that. That's when I use a UV filter on the lens and a rain sleeve on the camera. Otherwise, the only filter I use anymore is a circular polarizer.
"Beauty is in the eye of the beholder and it may be necessary from time to time to give a stupid or misinformed beholder a black eye." Miss Piggy
Eric, as usual, nailed it. Too agressive sharpening with too wide of radius. Try 0.6 for radius and 60-100% if using Lightroom. There are not crisply focused also with a strong backlight. Yes, get a D800. Make everyone envious;>). When used with care it is better than we are! Stan St Petersburg Russia