The Astrotracer (O-GPS1) works well with a 300mm lens :): Pentax SLR Talk Forum: Digital Photography Review
New Pentax K-3 Mark III Update Improves Astro Photos Without GPS | PetaPixel
PENTAX K-3 II "Built-in GPS, ASTROTRACER" - YouTube
Pentax Astrotracer O-GPS1 39012 , $2.18 Off with Free S&H — CampSaver
PENTAX: The choice for astrophotography / explore | RICOH IMAGING
ASTROTRACER | GPS UNIT O-GPS1 | RICOH IMAGING
PENTAX O-GPS2 – PENTAX - Official Store
Pentax Astrotracer DSLR camera kit - BBC Sky at Night Magazine
Discussing real-world applications of the Pentax Astrotracer with Tim Little - Photofocus
PENTAX: The choice for astrophotography / explore | RICOH IMAGING
K3 III Firmware 1.41 adds Astrotracer Type 3 officially - Page 5 - PentaxForums.com
Pentax Astrotracer Guide and GPS Feature Comparison - Articles and Tips | PentaxForums.com (Mobile)
Pentax GPS UNIT O-GPS2 Black Astrotracer compatible 2022 Model 30364 | eBay
Pentax PENTAX GPS unit O-GPS2 [Simple astronomical tracking as Astro tracer NEW | eBay
New Pentax GPS Unit Makes Astrophotography Easier and More Accurate | PetaPixel
Amazon.com : Bundle of PENTAX KF APS-C Digital SLR Camera Body kit + PENTAX O-GPS2 Handy GPS Unit with ASTROTRACER, Simple Navigation, Electronic Compass. Simplified Weather-Resistant Construction (30364) : Electronics
Amazon.com : PENTAX O-GPS2 Handy GPS Unit with ASTROTRACER, Simple Navigation, Electronic Compass. Simplified Weather-Resistant Construction (30364) : Electronics
The Astrotracer O-GPS2 on the Pentax K-3 MarkIII - Recommended setting – PENTAX - Official Store
Pentax PENTAX GPS unit O-GPS2 [Simple astronomical tracking as Astro tracer NEW | eBay
Pentax Astrotracer DSLR camera kit - BBC Sky at Night Magazine
Pentax Astrotracer DSLR camera kit - BBC Sky at Night Magazine
A simple tool for Pentax O-GPS (Astrotracer) Calibration more easy - PentaxForums.com
