Great try for your first attempt. I’m sure m’learned friends on here would agree keep shooting, the more you do the better you get, that and there are loads of quality photographers who post here and will be able offer lots of good advice.
Hi Rab,
I had the same lens earlier in the year(albeit on a Nikon body), binned it after 2 weeks, anything greater than about 230 mm was very soft and like you I found it very slow to focus.