Camera and Video
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Hi. My name is*****'m a camera repair technician with almost 30years in the business and I'll be glad to help you with your question today.
RAW is the maximum resolution for the image files. These capture more information than all other formats. The problem is in the lens you are using. In order to get an image that doesn't pixelate, you need to use a lens with a focal length appropriate to the image you are taking. You can't use a wide angle lens and blow up the center and expect it to look great.
Another thing to consider is the ISO. Just like film, a higher ISO will take less light but will have a poorer resolution. Fine photography has always been done at an ISO of 100 or less. Auto is usually only good for conditions where the lighting changes abrubtly and often. Try a controlled set of shots at the right focal length and ISO 100. You'll be amazed at the quality difference.
Again, I believe you are blowing the images up too far. You need to use a lens of an appropriate focal length for the subject being photographed. A zoom lens for larger images at a distance, macro lens for larger images close up.