Originally posted by Bui Or the question is, for someone owning both Pentax FF and APSC system,
I use K-1II and K-3II. Depends on the situation which body I use. Sometimes one or the other, sometimes both with different lenses.
K-3II has the 16-85 on it most of the time. K-1II has the 28-105 on it quite often. The 28-105 is a very good general purpose lens. I have also the 24-70 for the K-1II but the 28-105 is so good and much lighter that I use it unless the 24-70 is needed for a specific shot.
Why both? For me I use the different formats depending on what I am shooting. I plan on having both APS-C and FF bodies so having both is not an issue for me. For many shoots having at least two bodies on site is needed just in case. When just going out with a light kit the K-3II usually goes. When going out for sunset or sunrise or other difficult times the K-1II goes. So having 16-85 and 28-105 is for me, not a duplication.