Summary: The Sony 55-300 mm is a well-built and compact lens with a large zoom range and an attractive price tag. In-camera correction of distortion by the Sony A77 yields jpg files without visible distortion or chromatic aberration over the entire zoom range. Vignetting is kept low at all focal lengths, both in jpg and RAW files. Surprisingly, vignetting in RAW files proved to be a little lower in comparison with vignetting in the jpg files.
Pros: Compact design and built well, Attractive price and high price performance ratio, Jpg files very well corrected for distortion and chromatic aberration, High resolution over almost the entire zoom range
Cons: Visible distortion and chromatic aberration in RAW files, Slightly lower resolution at 300 mm