https://www.engadget.com/2011-06-02-pentax-releases-o-gps1-add-on-for-dslrs-appeals-to-astronomy-nu.html
Pentax releases O-GPS1 add-on for DSLRs, appeals to astronomy nuts
Jun 2, 2011 - Pentax's Optio WG-1 GPS point-and-shoot satisfied geotaggers out of the box, but owners of its K-5, K-r and 645D DSLRs have had to make do with third-party...
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