General Resources

• All official Pentax sites are united under Pentax Worldwide.
• The Pentax Discuss Mailing List (PDML) is made up of very friendly and knowledgeable folks. If you have interest in Pentax equipment, you are encouraged to read the welcome message, the FAQ or the archives. Before posting a message, you must subscribe.
• The Asahi Optical Historical Club (AOHC).
• BOA's Gallery with reviews of Pentax equipment.
• The now-defunct Pentax FAQ is also informative.
• The Pentax User Gallery.
• The Polish Pentax Users Club offers a portal with news and a discussion forum.
• The UK-based Pentax-User club.
• Pentaxiste is a French site featuring discussions, press reviews and photo galleries, all related to Pentax equipment.

Lens Resources

• Yoshihiko Takinami's Lens Resolution Tests web site.
• Frederick Wasti's Lens Resolution Tests web site.
• Arnold Stark's Lens Resolution Tests web site.
• The Pentax Lens Gallery currently maintained by Fred.
• Stan Halpin's Lens Comments Site.
• Jim Colwell's SPLOSdb (SMC Pentax lenses and other stuff database) traces the prices, frequency and condition of all SMC lenses and some LX accessories sold over eBay and others over a three-month period. The "pancake" is not at all rare, as it turns out!
• PhotoZone has quite a few tests of Pentax lenses.

Body Resources

• Service and repair manuals from Mark Roberts.
• A page dedicated to the Pentax LX.
• A nice page on the Pentax LX body.

Digital Resources

• Pentax DSLR discussion forum at dprewview.com
• John Francis has a page dedicated to the Pentax file formats.

Pentax Beyond the K Mount

• The Spotmatic web page is maintained by Peter Jonkman.
• An amazing collection of links to Pentax-related pages.
• Technical info on 6x7 lenses.
• Lots of manuals, Pentax and other K-Mount brands, can be found at Michael Butkus' site orphancameras.com.