bud 77 wrote:
I have had the 150-500 sigma for over a year and have had good results. It is heavy and I use a tripod when possible. I have made many hand held shots on bright days with good success. I don't think you can beat it for the money. Ask regis. he used one for a long time.
Regis has a Tamron not Sigma. I have one and as yet I'm not able to a photo as sharp as Regis.