I see a few problems with the images.
. The first one is either taken a very slow speed (so that the wind moved the grass) or there was a camera shake.
. The eagle heads are over exposed. Use centre weighed or spot metering in such cases.
Please try the following settings and take a number of shots.
. Use aperture priority
. Switch auto ISO off, set ISO to 100.
. Switch all extras off - distortion, noise etc.
. Shoot RAW.
. Use Center weighed metering.
. Use continuous Auto Focusing.
. Use single focus point.
Now set the aperture to F8, and choose the centre focusing point only. Half press the shutter button to get the focus, and check what exposure speed you are getting. If it is less than 1/250, increase the ISO. Shoot. Then decrease the aperture to say F5.6 and shoot. Once you get consistently sharp images, you can experiment with slower speeds or wider apertures.
With these settings unless the ISO is > 1600, you should get sharp and clear images. The best IQ is at ISO 100 and then the noise starts. With bright foreground and proper exposures ISO 400 and at times ISO 800 can give reasonably low noise shots (there is noise, but it is confined to shadows).
In case you find that your hand shakes and shots are getting blurred, increase the exposure speed, or use a flash if the objects are within its range. Check for proper camera holding technique on the net, that will decrease camera shake a lot. Secondly, while using a tripod extend it only as much as required, and that too with thicker legs first and thinner legs last. Ensure that the tripod is resting on firm ground and does not shake when you touch it.
