TrustedReviews posted a review of the Pentax Optio S55 digital camera

Available for £150.70, the Optio S55 is a budget-priced zoom compact that saves on development costs by sharing many of its features with other cameras in the Optio series. It has the familiar 3x zoom Sliding Lens System optics found on most of the other models in the range, the same big 2.5in LCD monitor found on the S5z, and the same slightly-larger-than-tiny aluminium alloy body found on the S45 and S50.

Pentax Optio S55 Digital Camera Review