3 legged Thing make a very good universal L bracket. Arca Swiss. They have 2 types and 2 colors.
QR11-LC-Equinox Copper, short side arm. QR11-LG-Eclipse Grey, short side arm. QR11-FBC-Equinox Copper, Long side arm for use with battery grips. QR11-FBG-Eclipse Grey, long side arm for use with battery grips.
Pentax is in the TIER 3 COMPATIBILITY, ( PENTAX - K-1, K-3 II, K-50, K-70, K-S2 ) The following cameras support the QR11, but access to the cable and battery doors is impeded. You have to remove L-Bracket to access battery. The base plate does alow the bracket to fit with access to battery, without grip. You just have to have the side arm about 2cm gap off the side of the camera.
I have the QR11-LG. Works great. No battery grip.
3 Legged Thing - L Brackets
Last edited by Craig66; 04-13-2018 at 05:36 PM.