Why my picture are not sharp and blur?

without seeing them, there could be all sorts wrong... and mostly down to you not knowing what you are doing with a DSLR... perhaps you got the DSLR before you were ready... or haven't learned anything...

without seeing them, there could be all sorts wrong... and mostly down to you not knowing what you are doing with a DSLR... perhaps you got the DSLR before you were ready... or haven't learned anything...

If you're doing everything right, you could have uncalibrated lenses. This happens sometimes with kit lenses and third-party brands like Tamron. Remember also, that kit lenses and budget zoom lenses are not very sharp at their wide apertures. 70-300 budget zooms tend not to be very sharp at the 300mm end, no matter what aperture you use. This is what I'd do: 1. Make sure both lenses are dust and smudge free on both ends of the lenses. 2. Set up on a tripod on a well lit subject with a lot of potential detail. 3. Put camera in aperture priority and keep it in f8.0. This should be the sharpest aperture for both lenses. 3. Take a series of shots using autofocus. Be sure to do this with a manually selected autofocus point for consistency. Check the photos to make sure the autofocus is consistent and accurate. 4. Now take a shot using manual focus. Be very careful to visually check through the view finder for accurate focus. Verify that the results match the autofocus series. Conclusion: This will verify at least, that it's not lens or autofocus error. If you do have an uncalibrated lens, and it's still under warranty, you can send them to the manufacturers for calibration. There's plenty of aspects to shooting technique that can lead to unsharp images, particularly with your telephoto lens - shutterspeed too low, shakey hands, automatic autofocus point selection, and so on.

I wouldnt know since i dont have an example. but my guess is that your pictures are not focused right, so they might come out blurry.

Is your camera actually focussed? xD

Is your camera actually focussed? xD

If you're doing everything right, you could have uncalibrated lenses. This happens sometimes with kit lenses and third-party brands like Tamron. Remember also, that kit lenses and budget zoom lenses are not very sharp at their wide apertures. 70-300 budget zooms tend not to be very sharp at the 300mm end, no matter what aperture you use. This is what I'd do: 1. Make sure both lenses are dust and smudge free on both ends of the lenses. 2. Set up on a tripod on a well lit subject with a lot of potential detail. 3. Put camera in aperture priority and keep it in f8.0. This should be the sharpest aperture for both lenses. 3. Take a series of shots using autofocus. Be sure to do this with a manually selected autofocus point for consistency. Check the photos to make sure the autofocus is consistent and accurate. 4. Now take a shot using manual focus. Be very careful to visually check through the view finder for accurate focus. Verify that the results match the autofocus series. Conclusion: This will verify at least, that it's not lens or autofocus error. If you do have an uncalibrated lens, and it's still under warranty, you can send them to the manufacturers for calibration. There's plenty of aspects to shooting technique that can lead to unsharp images, particularly with your telephoto lens - shutterspeed too low, shakey hands, automatic autofocus point selection, and so on.

I wouldnt know since i dont have an example. but my guess is that your pictures are not focused right, so they might come out blurry.

Clean both sides of the lens so you can be sure there are no oils or smudges on it. You may need to adjust your aperture and/or the lighting.