Tamron makes 150-600's for different brands. This one is for Canon cameras.

After it was pointed out that I did not directly say it was a canon I went back and edited my post. Sorry for the confusion!😬

Sorry. I neglected to say that it is a Canon mount.

I have a first generation Tamron 150-600 up for sale. It is for a Canon camera . It is approximately two years old. I would classify it as a 9 out of 10 quality wise. I have it up for sale as I am going to take the plunge for a new canon 100-400. I would like to get $700 for it. I know with the new g2's out the demand for a g1 might be light, but if you are interested in a 150-600 in great condition feel free to contact me.

My guess would be a Susie mallard x domestic duck cross.