Gonna get technical here lol so Lab, Toby, just ignore.............. It's a 200mm on a constant f2.8 through all focal lengths.... which means I can zoom right in without losing light or needing to lose shutter speed. I fitted a 1.4x converter to it so I get 280mm at the price of 1 F stop, which brings it up to F4 through all focal lengths. I think the trade off is worth it for nearly a half more zoom Its a sigma 70-200mm F2.8 APO lens if you want to look it up on warehouseexpress.com I'm not sure if they still do that one, had it for donkeys. the lens cost me I think, £750ish.
ok