Pentax A35-105 f3.5, purchased from KEH in 'bargain' condition. When I change the zoom, the focus seems to change.
For example, at 105mm focused out at 20', after zooming out a bit it will clearly focus well below the 20' mark on the focus scale. I find that I cannot trust the scale near the 35mm end of the zoom range. Is this actually a varifocal lens? Brian
