There are various ways in which you can limit the file size of PDF files. A page on this site describes the various PDF compression algorithms. In September 2007 I asked the visitors of this site which they considered to be the best compression setting for images.
How do you compress images in PDF files?
- JPEG Max quality (33%, 71 Votes)
- ZIP (30%, 65 Votes)
- No compression (25%, 55 Votes)
- JPEG other setting (7%, 16 Votes)
- JPEG 2000 (5%, 10 Votes)
Total Voters: 217
There is an entire section on this site devoted to a more in-depth description of compression algorithms.