I have a zillion or so lenses. About 80 of them mount on my K20D without undue assistance (bellows, reversal rings, etc). Exactly
six (6) of those are AF. The
DA18-250 is still my default in dynamic situations. The rest of the time, it's usually one of these:
Zenitar 16/2.8 -- Tokina 21/3.8 -- Sigma-Z 24/2.8 -- M28/3.8 -- Isco 35/2.8 -- S-Tak 35/3.5 -- Meyer 50/1.8 -- Macro-Tak 50M/4 -- Helios-44 58/2 -- Nikkor 85/2 -- Vivitar 90M/2.8 -- K135/2.5 -- Tele-Tak 200/5.6
Or any of the 60 other manual lenses. Different days, different defaults. Some days it's a LF or MF or enlarger lens on bellows. Some days, when I feel strong, it's the Vivitar Series 1 Version 1 70-210/3.5. Some days it's the weird
Schneider Betavaron enlarger zoom (on 30mm extension). Some days it's an Industar-58U 75/3.5 fixed-focus. Ya just never can tell.