It seems like Pentax have a custom fit head/quick release system for at least the 645 system. QS-B1/QS-20. The plate has that prong that fit into the hole near the tripod socket on the camera bodies preventing twisting. BTW the plate also seem to fit the tripod sockets for various Pentax K lenses with tripod sockets. As far as I can judge from the pictures at Pentax Japan web page it seems to fit the Velbon head type. Can anyone confirm this? I happen to use the Velbon PH 273 head and it needs a new top plate anyway as the lever for releasing the camera is broken. The Pentax one seems very interesting.
Head base: http://shop.pentax.jp/defaultMall/sitemap/CSfLastGenGoodsPage_001.jsp? Plate at the bottom of the page Does anyone know about this? Does Pentax Japan accept international orders? Pål
