http://www.pentax.jp/japan/support/download/digital/k5_s.htmlhttp://www.pentax.jp/japan/support/download/digital/kr_s.htmlhttp://www.pentax.jp/japan/support/download/digital/645d_s.htmlVia http://www.pentax.jp/japan/index.html(All in Japanese)It says it is made to support the new O-GPS1 unit. It says nothing about if the new firmware of K-r will relief the consistent tungsten/yellow light Front
