I have just bought an olderto try & see if I like nature photography ?
It is a silver plastic 100-300 & I am using it on my SD15.
The pix I took today look like I have far too much noise
Very grainy & spotty colours, nothing in focus. I can see it was getting OK.
I was using manual mode with both auto-focus & manual focus.
I had it set for f10, ISO200 & white balance for a sunny day, adjusted the for zero, each shot.
I have a sturdy tri-pod.
I know I need more reach now, but image quality is bad
I have a new 18-200 & it is OK, just not the length.