I am trying to get my photos accepted at stock houses, the only problem that I'm having is, when they magnify the photos at 100%, my photos are rejected because of blurr.

I have a Canon Rebel xsi, I know that it is a great camera, and capable of shooting crisp photos, however, not mine. I'm inclined to believe it is me, and I don't know what exactly I'm doing wrong.

The photos look fine until magnified. I'm a beginner and getting a bit frustrated. I have read the owners manual a couple of times, I also have a Canon trining video, but, I seem to be missing something.:confused:

It would really help to see one of these photos.

The Rebel XSI is not a pro level camera, and if you are using it with the kit lens that isn't a pro level lens. Your images will never be any better than the glass (lens) used to gather the light and focus it at the sensor.

In addition, a lot depends on the filters you use (or don't use), the focusing methods, the lighting, the exposure, if you are using a tripod, etc.

Are you shooting in jpeg or raw modes?

What are you doing in your post processing?

Finally, what sharpening settings are you using as you prepare the final image for delivery to the stock site?