I had a few hours to kill whilst my car was being seviced, I found a field behind the local church. It was pretty cold but I managed several shots or robins and Stonechats.
OM-1, 150-400TC
Focal Length (35 mm conversion) : 801.0mm
Exposure mode : Manual exposure
PhotographicSensitivity : 320
Exposure compensation : 0.0 EV
Shutter : 1/1600 sec
Aperture : F4.5
ACR/PSCC