[Q] Pentax 1.7tc with 60-250
the focal lens is use for shaking Reduction system of the body, so maybe you should enter 1.7 x 250 if you use the longest length ( maybe you do, that reason you add a tele converter )
Thanks, yes that's what i've been doing.
What is the logic for not passing an adjusted FL from the adapter to the body? The aperture is adjusted.