Vermont Landscape - Sharpness Concern

[clicknlearn]

Hello All,
When taking landscape pictures, I've observed that none of the pics have great sharpness at 100% zoom. For e.g. in the below pic if you zoom it 100% and then look at the point where the trees and the mountain meet, you can see that the content there became very soft/blurry. Can you suggest on how I cam improve the sharpness? Also, I would appreciate if you guys can comment on the rest of the pics as well:

EXIF:
Canon Rebel XSi
Shutter Speed: 1/30 s
ISO : 100
Aperture : f/7.1
Focal Length: 21 mm


Regards,
SV

[Sterling]

I'll take your word for it. I don't see any obvious bluriness but I'm not pixel-peeping at 100% either. The only thing I can suggest is that at 1/30 sec., you are right in the zone of introducing blur from camera shake or blur from subject movement. Increase your shutter speed and check again. But don't expect razor sharpness when viewing at 100%.

[clicknlearn]

Thank you Sterling. I agree, close to the zone that can cause blur. I've tried various settings as well. If you look at other images in the following link you can notice that that sharpness still doesn't exist at 100%. May be as you said, I shouldn't expect razor sharpness.
EXIF:
1/100s
ISO: 100
Aperture: f/8
Focal Length: 30mm
I would appreciate if you can comment on the other pics as well, regarding composition.

[Krusty79]

I have a Canon XS also and have noticed the same problem at times. So, I bought a tripod and recently purchased a wired remote (the XS won't take the wireless one). Are you using the 18-55 kit lens like I am? Have you tried using the self-timer or remote shutter?