Originally posted by gifthorse If you want to do astrophotography only the Pentaxes ( K-r, K-5, K5II, K-5IIs, and the K-3) can use the O-GPS1, also called 'Astrotracer'.
pentax-o-gps1 According to my K50 manual and the K30 manual and in the camera menu settings, the O-GPS1 shows as being a functional accessory option on these two cameras also. I think the Ricoh web site camera listing for this accessory hasn't been updated to include these.
Using the GPS Unit
The following functions are available when the optional GPS unit O-GPS1is attached to this camera.
Electronic Compass
Displays the latitude,
longitude, altitude of the
current location, lens
direction and Coordinated Universal
Time (UTC) in standby mode.
ASTROTRACER
Tracks and captures celestial bodies. By matching the
movement of the camera’s built-in shake reduction unit
with the movement of celestial bodies, celestial bodies
can be captured as individual points even when shooting
with a long exposure setting. (p.270)
GPS Time Sync Automatically adjusts the camera’s date and time
settings using information acquired from GPS satellites.
• Refer to the manual of the GPS unit for details on how to attach the unit and
information on the unit’s functions.
• To display the electronic compass, press the M button twice in standby
mode and select [Electronic Compass] from the standby mode display
selection screen. (p.29)
“Simple Navigation” cannot be used with this camera.