By simply mounting the O-GPS1 onto the hotshoe of a Pentax digital SLR camera, (compatible models are the K-5, K-r and 645D (as of May 2011). Some of the O-GPS1’s functions may not be available when used with the 645D) users can record the latitude, longitude, altitude, universal time coordinated (UTC) and aspect of the location they are shooting directly onto each image they capture. Image files carrying GPS location data, can then be used to track shooting locations and review location data on a PC. GPS location data stored on such files also makes it much easier to sort and file recorded images.
By coupling GPS data with the camera’s SR (Shake Reduction) system, the unit offers a range of unique, advanced applications, including ASTROTRACER, Simple Navigation and an Electronic Compass.