I can not get sharp and clear photograph from k750i mobile camra?

Answer 1

How are the Sony Ericsson K750i photos?
Very good. I don't have in mind the 2 megapixel resolution, but the automatic focus. Like all digital cameras, the button has two positions. When you push it with a little pressure, the camera focuses, the phone beeps, a symbol appears on the display; and when you push all the way the picture is taken. While capturing, you can listen and feel with your fingers how the lens are moving inside the phone.
Sony Ericsson K750i however, doesn't work like a real digital camera - it does not change the aperture, it is fixed at F2.8. The amount of light, which gets to the sensor is regulated only with the shutter speed; in worse light conditions ISO sensitivity is also used. With the higher ISO sensitivities the noise in the picture increases.

Thanks to the fine display, the image in the viewfinder is perfectly sharp, but after the capture of the photo blurs a little. Obviously, this is because of the fact, that the phone is trying to display the whole 2 megapixel picture, which downsampled loses some sharpness.
Sony Ericsson K750i is a class above the compared camera phones and two classes above all others. Pictures, of course are not perfect. You may have remarks on the local defocusing on the right side of all the pictures (of course, this is the disadvantage of the pre-production unit), the pictures often are more colorful than normal, but this is also a feature of the Sony digital cameras. However, this is the best camera phone for nowadays and the near future.