Originally posted by timb64 I’ve been very pleased with a Think Tank Turnstyle 10 ,I use mine for a KP with 55-300 PLM attached and also carry a 16-85 so a medium size would probably be fine for just your K1.It’s very well made and doesn’t scream “ camera bag”
I'll second the Turnstyle 10, Here's mine with the KP with 20-40 mounted, 55-300PLM, DA 15 (in an individual pouch in last section). Unfortunately I don't have a K-1 to check, it might need the Turnstyle 20. I got it in April 2017 and can't image switching to another bag. I actually also have a smaller Turnstyle 5 that I got when I had a Sony a6000 for a while, now use it for film cameras. The KP with a lens will fit in it, but it's snug.