Amazon.com : Pentax GPS Unit O-GPS1 Hotshoe Mounted Accessory GPS Unit for Pentax K-5, K-r, 645D : Flash Shoe Mounts : Electronics
無痛「追星」:Pentax O-GPS2 對應四大定位系統- DCFever.com
PENTAX O-GPS1 A handy GPS unit for digital SLR cameras, offering innovative features for effortless tracking and photographing of celestial bodies | RICOH IMAGING
New Pentax GPS Unit Makes Astrophotography Easier and More Accurate | PetaPixel