Olympus 40-150 F/2.8 Pro - a great cashback deal at the moment.
I also bought these but I don't see me keeping any (though my shelf would suggest I have said that before and not been honest with myself)
Canon FD 135mm F/3.5
Olympus Zuiko Auto-Zoom 50-90mm F/3.5
Olympus E.Zuiko Auto-T 100mm F/3.5
Olympus E.Zuiko Auto-T 150mm F/4
Olympus Zuiko Zoom 100-200mm F/5
RMC Tokina EMZ 80-200mm F/4.5
Sigma Zoom II 60-200mm F4-5.6
Rodenstock Retina-Heligon C 80mm F/4
Rodenstock Retina-Heligon C 50mm F/2.8
Fujica STX-1
X-Fujinon 50mm F/1.9 FM
Pentax-M Zoom 75-150mm F/4
Pentax MV
SMC Pentax-M 50mm F/2
Kodak Retina IIC (Type 029)