Thanks again, all.
I'll be honest and say that due to how I use the kit I probably don't get the best out it.
I wish I was in a situation where I could hunker down, get comfortable and prepared, and wait for birds to present themselves to me in good light, on good perches with nice clear backgrounds.
The reality is that I live in an industrialised area of England with precious little in the the way of decent bird photograph opportunities. I'm on the move all the time just to find birds to photograph, and most of my opportunities are "snatched", which doesn't really lend itself to brilliant pictures.
Even with my wader/shorebird shots, the beaches here are always busy with the Great Unwashed and people emptying their dogs - I've had rocks thrown at me when I've been sitting waiting for turnstones to get a bit closer!
Not ideal photographic situations, as I say.
Jason,
my BT pictures were taken up the road from you at Pensthorpe Wildfowl Park.
I'm not normally one for shooting captive birds, but they have a couple of large free-flying aviaries, one of which contains a family of bearded tits - they're hard to resist, given that the "reedbed" they live in is about 15 feet past the entrance to their aviary - and you'll be all but stepping over avocet, ruff and redshank to get to them!
