I'm not so sure about that. The GX-10 doesn't have .pef files
(only .dng) and it could well have a different image processing
engine n it. After all, Samsung have made plenty of cameras prior
to the GX and PRIME might have been something that Pentax wished to
The Samsung does have .pef files and from what I have read in the
manual it is the same camera as the k10d with only a few cosmetic
differences on the back. I will be loaning a GX10 next week for a
couple of weeks so I downloaded both manuals to see what the
differences are and I think even the manual is mostly lifted from
Pentax-certain parts word for word. The GX10 manual doesn't mention
'prime' but as has been said it is a Pentax acronym and they also
call their antishake OPS as in the compacts that have it. Their
lenses also appear to be clones of Pentax lenses but with a
different coloured ring and a different name. Interestingly Jessops
are advertising the GX10 with 18-55 lens for £599 and the K10d with
18-55 for £849.