I have got the lens 2 days back and am initially happy. Basically I don't expect an IQ equivalent to my 500 f4 . It is a very good lens for the budget. I opted for this because I am struggling with my old 100-400 over reach. Iq wise the new Tammy is almost as good as the 100-400 and the extra reach is welcome for a day to day use . The only thing I can complain is a little slower auto focus when it is focused on the other end. Ev en with flying birds I feel OK with the lens. This is an example of the flying rock pigeon with the exif data....
Canon EOS-1D X
06/02/2014 8:44:58 AM
Manual Exposure
1/2500
7.1
Evaluative Metering
ISO1000
TAMRON SP 150-600mm F/5-6.3 Di VC USD A011
600.0mm
RAW
Auto WB
AI Servo AF
Low-speed continuous shooting
Canon EOS-1D X
06/02/2014 8:44:58 AM
Manual Exposure
1/2500
7.1
Evaluative Metering
ISO1000
TAMRON SP 150-600mm F/5-6.3 Di VC USD A011
600.0mm
RAW
Auto WB
AI Servo AF
Low-speed continuous shooting
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