You probably landed here from a web page where the pictures were taken using one of two small compact cameras (nothing fancy) equipped usually with slide film (in a few cases also print film was used).
Underwater pictures were taken typically with one of those disposable cameras. In spite of their cheap price, I find that the pictures are normally decent. In some cases I have obtained pictures of some quality even at twenty meters' depth. In at least one case, I was however disappointed even with pictures taken just under the water in full daylight.
The pictures or the slides were subsequently scanned using a medium quality (i.e., not the cheapest model, but certainly not top of the line) scanner. Typical resolutions used were 300dpi for the prints, and 1200dpi for the slides. On average, it takes me about 40 minutes to scan and organize a 36-slides set, somewhat less for prints.
The images shown on my pages were usually resampled from the original resolution of the scans, down to about 800x600 or 640x480 in order to save bandwidth for the viewers. The images are usually 24bit JPG.

In order to work on the images, and to generate the HTML pages, I have relied almost completely on freeware available partly on the Windows side, and partly for Unix/Linux.
The text is solely my own, and I am responsible for any idiocy or mistake you may notice. In such cases, I would be grateful if you could point to me the offending line, and I'll try to correct it.

Thanks for visiting my travel pictures page. Try also my work and my personal homepages.

A. Richichi